--- /dev/null
+* Texas Instrument OMAP SCM bandgap bindings
+
+In the System Control Module, OMAP supplies a voltage reference
+and a temperature sensor feature that are gathered in the band
+gap voltage and temperature sensor (VBGAPTS) module. The band
+gap provides current and voltage reference for its internal
+circuits and other analog IP blocks. The analog-to-digital
+converter (ADC) produces an output value that is proportional
+to the silicon temperature.
+
+Required properties:
+- compatible : Should be:
+ - "ti,omap4430-bandgap" : for OMAP4430 bandgap
+ - "ti,omap4460-bandgap" : for OMAP4460 bandgap
+ - "ti,omap4470-bandgap" : for OMAP4470 bandgap
+ - "ti,omap5430-bandgap" : for OMAP5430 bandgap
+- interrupts : this entry should indicate which interrupt line
+the talert signal is routed to;
+Specific:
+- ti,tshut-gpio : this entry should be used to inform which GPIO
+line the tshut signal is routed to;
+- regs : this entry must also be specified and it is specific
+to each bandgap version, because the mapping may change from
+soc to soc, apart of depending on available features.
+
+Example:
+OMAP4430:
+bandgap {
+ reg = <0x4a002260 0x4 0x4a00232C 0x4>;
+ compatible = "ti,omap4430-bandgap";
+};
+
+OMAP4460:
+bandgap {
+ reg = <0x4a002260 0x4
+ 0x4a00232C 0x4
+ 0x4a002378 0x18>;
+ compatible = "ti,omap4460-bandgap";
+ interrupts = <0 126 4>; /* talert */
+ ti,tshut-gpio = <86>;
+};
+
+OMAP4470:
+bandgap {
+ reg = <0x4a002260 0x4
+ 0x4a00232C 0x4
+ 0x4a002378 0x18>;
+ compatible = "ti,omap4470-bandgap";
+ interrupts = <0 126 4>; /* talert */
+ ti,tshut-gpio = <86>;
+};
+
+OMAP5430:
+bandgap {
+ reg = <0x4a0021e0 0xc
+ 0x4a00232c 0xc
+ 0x4a002380 0x2c
+ 0x4a0023C0 0x3c>;
+ compatible = "ti,omap5430-bandgap";
+};
source "drivers/staging/csr/Kconfig"
-source "drivers/staging/ti-soc-thermal/Kconfig"
-
source "drivers/staging/silicom/Kconfig"
source "drivers/staging/ced1401/Kconfig"
obj-$(CONFIG_USB_WPAN_HCD) += ozwpan/
obj-$(CONFIG_WIMAX_GDM72XX) += gdm72xx/
obj-$(CONFIG_CSR_WIFI) += csr/
-obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/
obj-$(CONFIG_NET_VENDOR_SILICOM) += silicom/
obj-$(CONFIG_CED1401) += ced1401/
obj-$(CONFIG_DRM_IMX) += imx-drm/
+++ /dev/null
-config TI_SOC_THERMAL
- tristate "Texas Instruments SoCs temperature sensor driver"
- depends on THERMAL
- depends on ARCH_HAS_BANDGAP
- help
- If you say yes here you get support for the Texas Instruments
- OMAP4460+ on die bandgap temperature sensor support. The register
- set is part of system control module.
-
- This includes alert interrupts generation and also the TSHUT
- support.
-
-config TI_THERMAL
- bool "Texas Instruments SoCs thermal framework support"
- depends on TI_SOC_THERMAL
- depends on CPU_THERMAL
- help
- If you say yes here you want to get support for generic thermal
- framework for the Texas Instruments on die bandgap temperature sensor.
-
- This includes trip points definitions, extrapolation rules and
- CPU cooling device bindings.
-
-config OMAP4_THERMAL
- bool "Texas Instruments OMAP4 thermal support"
- depends on TI_SOC_THERMAL
- depends on ARCH_OMAP4
- help
- If you say yes here you get thermal support for the Texas Instruments
- OMAP4 SoC family. The current chip supported are:
- - OMAP4430
- - OMAP4460
- - OMAP4470
-
- This includes alert interrupts generation and also the TSHUT
- support.
-
-config OMAP5_THERMAL
- bool "Texas Instruments OMAP5 thermal support"
- depends on TI_SOC_THERMAL
- depends on SOC_OMAP5
- help
- If you say yes here you get thermal support for the Texas Instruments
- OMAP5 SoC family. The current chip supported are:
- - OMAP5430
-
- This includes alert interrupts generation and also the TSHUT
- support.
+++ /dev/null
-obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal.o
-ti-soc-thermal-y := ti-bandgap.o
-ti-soc-thermal-$(CONFIG_TI_THERMAL) += ti-thermal-common.o
-ti-soc-thermal-$(CONFIG_OMAP4_THERMAL) += omap4-thermal-data.o
-ti-soc-thermal-$(CONFIG_OMAP5_THERMAL) += omap5-thermal-data.o
+++ /dev/null
-List of TODOs (by Eduardo Valentin)
-
-on ti-bandgap.c:
-- Revisit PM support
-
-on ti-thermal-common.c/ti-thermal.h:
-- Revisit need for locking
-
-generally:
-- make sure this code works on OMAP4430, OMAP4460 and OMAP5430
-
-Copy patches to Eduardo Valentin <eduardo.valentin@ti.com>
+++ /dev/null
-/*
- * OMAP4 thermal driver.
- *
- * Copyright (C) 2011-2012 Texas Instruments Inc.
- * Contact:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include "ti-thermal.h"
-#include "ti-bandgap.h"
-#include "omap4xxx-bandgap.h"
-
-/*
- * OMAP4430 has one instance of thermal sensor for MPU
- * need to describe the individual bit fields
- */
-static struct temp_sensor_registers
-omap4430_mpu_temp_sensor_registers = {
- .temp_sensor_ctrl = OMAP4430_TEMP_SENSOR_CTRL_OFFSET,
- .bgap_tempsoff_mask = OMAP4430_BGAP_TEMPSOFF_MASK,
- .bgap_soc_mask = OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK,
- .bgap_eocz_mask = OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK,
- .bgap_dtemp_mask = OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK,
-
- .bgap_mode_ctrl = OMAP4430_TEMP_SENSOR_CTRL_OFFSET,
- .mode_ctrl_mask = OMAP4430_SINGLE_MODE_MASK,
-
- .bgap_efuse = OMAP4430_FUSE_OPP_BGAP,
-};
-
-/* Thresholds and limits for OMAP4430 MPU temperature sensor */
-static struct temp_sensor_data omap4430_mpu_temp_sensor_data = {
- .min_freq = OMAP4430_MIN_FREQ,
- .max_freq = OMAP4430_MAX_FREQ,
- .max_temp = OMAP4430_MAX_TEMP,
- .min_temp = OMAP4430_MIN_TEMP,
- .hyst_val = OMAP4430_HYST_VAL,
-};
-
-/*
- * Temperature values in milli degree celsius
- * ADC code values from 530 to 923
- */
-static const int
-omap4430_adc_to_temp[OMAP4430_ADC_END_VALUE - OMAP4430_ADC_START_VALUE + 1] = {
- -38000, -35000, -34000, -32000, -30000, -28000, -26000, -24000, -22000,
- -20000, -18000, -17000, -15000, -13000, -12000, -10000, -8000, -6000,
- -5000, -3000, -1000, 0, 2000, 3000, 5000, 6000, 8000, 10000, 12000,
- 13000, 15000, 17000, 19000, 21000, 23000, 25000, 27000, 28000, 30000,
- 32000, 33000, 35000, 37000, 38000, 40000, 42000, 43000, 45000, 47000,
- 48000, 50000, 52000, 53000, 55000, 57000, 58000, 60000, 62000, 64000,
- 66000, 68000, 70000, 71000, 73000, 75000, 77000, 78000, 80000, 82000,
- 83000, 85000, 87000, 88000, 90000, 92000, 93000, 95000, 97000, 98000,
- 100000, 102000, 103000, 105000, 107000, 109000, 111000, 113000, 115000,
- 117000, 118000, 120000, 122000, 123000,
-};
-
-/* OMAP4430 data */
-const struct ti_bandgap_data omap4430_data = {
- .features = TI_BANDGAP_FEATURE_MODE_CONFIG |
- TI_BANDGAP_FEATURE_CLK_CTRL |
- TI_BANDGAP_FEATURE_POWER_SWITCH,
- .fclock_name = "bandgap_fclk",
- .div_ck_name = "bandgap_fclk",
- .conv_table = omap4430_adc_to_temp,
- .adc_start_val = OMAP4430_ADC_START_VALUE,
- .adc_end_val = OMAP4430_ADC_END_VALUE,
- .expose_sensor = ti_thermal_expose_sensor,
- .remove_sensor = ti_thermal_remove_sensor,
- .sensors = {
- {
- .registers = &omap4430_mpu_temp_sensor_registers,
- .ts_data = &omap4430_mpu_temp_sensor_data,
- .domain = "cpu",
- .slope = OMAP_GRADIENT_SLOPE_4430,
- .constant = OMAP_GRADIENT_CONST_4430,
- .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_4430,
- .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_4430,
- .register_cooling = ti_thermal_register_cpu_cooling,
- .unregister_cooling = ti_thermal_unregister_cpu_cooling,
- },
- },
- .sensor_count = 1,
-};
-/*
- * OMAP4460 has one instance of thermal sensor for MPU
- * need to describe the individual bit fields
- */
-static struct temp_sensor_registers
-omap4460_mpu_temp_sensor_registers = {
- .temp_sensor_ctrl = OMAP4460_TEMP_SENSOR_CTRL_OFFSET,
- .bgap_tempsoff_mask = OMAP4460_BGAP_TEMPSOFF_MASK,
- .bgap_soc_mask = OMAP4460_BGAP_TEMP_SENSOR_SOC_MASK,
- .bgap_eocz_mask = OMAP4460_BGAP_TEMP_SENSOR_EOCZ_MASK,
- .bgap_dtemp_mask = OMAP4460_BGAP_TEMP_SENSOR_DTEMP_MASK,
-
- .bgap_mask_ctrl = OMAP4460_BGAP_CTRL_OFFSET,
- .mask_hot_mask = OMAP4460_MASK_HOT_MASK,
- .mask_cold_mask = OMAP4460_MASK_COLD_MASK,
-
- .bgap_mode_ctrl = OMAP4460_BGAP_CTRL_OFFSET,
- .mode_ctrl_mask = OMAP4460_SINGLE_MODE_MASK,
-
- .bgap_counter = OMAP4460_BGAP_COUNTER_OFFSET,
- .counter_mask = OMAP4460_COUNTER_MASK,
-
- .bgap_threshold = OMAP4460_BGAP_THRESHOLD_OFFSET,
- .threshold_thot_mask = OMAP4460_T_HOT_MASK,
- .threshold_tcold_mask = OMAP4460_T_COLD_MASK,
-
- .tshut_threshold = OMAP4460_BGAP_TSHUT_OFFSET,
- .tshut_hot_mask = OMAP4460_TSHUT_HOT_MASK,
- .tshut_cold_mask = OMAP4460_TSHUT_COLD_MASK,
-
- .bgap_status = OMAP4460_BGAP_STATUS_OFFSET,
- .status_clean_stop_mask = OMAP4460_CLEAN_STOP_MASK,
- .status_bgap_alert_mask = OMAP4460_BGAP_ALERT_MASK,
- .status_hot_mask = OMAP4460_HOT_FLAG_MASK,
- .status_cold_mask = OMAP4460_COLD_FLAG_MASK,
-
- .bgap_efuse = OMAP4460_FUSE_OPP_BGAP,
-};
-
-/* Thresholds and limits for OMAP4460 MPU temperature sensor */
-static struct temp_sensor_data omap4460_mpu_temp_sensor_data = {
- .tshut_hot = OMAP4460_TSHUT_HOT,
- .tshut_cold = OMAP4460_TSHUT_COLD,
- .t_hot = OMAP4460_T_HOT,
- .t_cold = OMAP4460_T_COLD,
- .min_freq = OMAP4460_MIN_FREQ,
- .max_freq = OMAP4460_MAX_FREQ,
- .max_temp = OMAP4460_MAX_TEMP,
- .min_temp = OMAP4460_MIN_TEMP,
- .hyst_val = OMAP4460_HYST_VAL,
- .update_int1 = 1000,
- .update_int2 = 2000,
-};
-
-/*
- * Temperature values in milli degree celsius
- * ADC code values from 530 to 923
- */
-static const int
-omap4460_adc_to_temp[OMAP4460_ADC_END_VALUE - OMAP4460_ADC_START_VALUE + 1] = {
- -40000, -40000, -40000, -40000, -39800, -39400, -39000, -38600, -38200,
- -37800, -37300, -36800, -36400, -36000, -35600, -35200, -34800,
- -34300, -33800, -33400, -33000, -32600, -32200, -31800, -31300,
- -30800, -30400, -30000, -29600, -29200, -28700, -28200, -27800,
- -27400, -27000, -26600, -26200, -25700, -25200, -24800, -24400,
- -24000, -23600, -23200, -22700, -22200, -21800, -21400, -21000,
- -20600, -20200, -19700, -19200, -18800, -18400, -18000, -17600,
- -17200, -16700, -16200, -15800, -15400, -15000, -14600, -14200,
- -13700, -13200, -12800, -12400, -12000, -11600, -11200, -10700,
- -10200, -9800, -9400, -9000, -8600, -8200, -7700, -7200, -6800,
- -6400, -6000, -5600, -5200, -4800, -4300, -3800, -3400, -3000,
- -2600, -2200, -1800, -1300, -800, -400, 0, 400, 800, 1200, 1600,
- 2100, 2600, 3000, 3400, 3800, 4200, 4600, 5100, 5600, 6000, 6400,
- 6800, 7200, 7600, 8000, 8500, 9000, 9400, 9800, 10200, 10600, 11000,
- 11400, 11900, 12400, 12800, 13200, 13600, 14000, 14400, 14800,
- 15300, 15800, 16200, 16600, 17000, 17400, 17800, 18200, 18700,
- 19200, 19600, 20000, 20400, 20800, 21200, 21600, 22100, 22600,
- 23000, 23400, 23800, 24200, 24600, 25000, 25400, 25900, 26400,
- 26800, 27200, 27600, 28000, 28400, 28800, 29300, 29800, 30200,
- 30600, 31000, 31400, 31800, 32200, 32600, 33100, 33600, 34000,
- 34400, 34800, 35200, 35600, 36000, 36400, 36800, 37300, 37800,
- 38200, 38600, 39000, 39400, 39800, 40200, 40600, 41100, 41600,
- 42000, 42400, 42800, 43200, 43600, 44000, 44400, 44800, 45300,
- 45800, 46200, 46600, 47000, 47400, 47800, 48200, 48600, 49000,
- 49500, 50000, 50400, 50800, 51200, 51600, 52000, 52400, 52800,
- 53200, 53700, 54200, 54600, 55000, 55400, 55800, 56200, 56600,
- 57000, 57400, 57800, 58200, 58700, 59200, 59600, 60000, 60400,
- 60800, 61200, 61600, 62000, 62400, 62800, 63300, 63800, 64200,
- 64600, 65000, 65400, 65800, 66200, 66600, 67000, 67400, 67800,
- 68200, 68700, 69200, 69600, 70000, 70400, 70800, 71200, 71600,
- 72000, 72400, 72800, 73200, 73600, 74100, 74600, 75000, 75400,
- 75800, 76200, 76600, 77000, 77400, 77800, 78200, 78600, 79000,
- 79400, 79800, 80300, 80800, 81200, 81600, 82000, 82400, 82800,
- 83200, 83600, 84000, 84400, 84800, 85200, 85600, 86000, 86400,
- 86800, 87300, 87800, 88200, 88600, 89000, 89400, 89800, 90200,
- 90600, 91000, 91400, 91800, 92200, 92600, 93000, 93400, 93800,
- 94200, 94600, 95000, 95500, 96000, 96400, 96800, 97200, 97600,
- 98000, 98400, 98800, 99200, 99600, 100000, 100400, 100800, 101200,
- 101600, 102000, 102400, 102800, 103200, 103600, 104000, 104400,
- 104800, 105200, 105600, 106100, 106600, 107000, 107400, 107800,
- 108200, 108600, 109000, 109400, 109800, 110200, 110600, 111000,
- 111400, 111800, 112200, 112600, 113000, 113400, 113800, 114200,
- 114600, 115000, 115400, 115800, 116200, 116600, 117000, 117400,
- 117800, 118200, 118600, 119000, 119400, 119800, 120200, 120600,
- 121000, 121400, 121800, 122200, 122600, 123000, 123400, 123800, 124200,
- 124600, 124900, 125000, 125000, 125000, 125000
-};
-
-/* OMAP4460 data */
-const struct ti_bandgap_data omap4460_data = {
- .features = TI_BANDGAP_FEATURE_TSHUT |
- TI_BANDGAP_FEATURE_TSHUT_CONFIG |
- TI_BANDGAP_FEATURE_TALERT |
- TI_BANDGAP_FEATURE_MODE_CONFIG |
- TI_BANDGAP_FEATURE_POWER_SWITCH |
- TI_BANDGAP_FEATURE_CLK_CTRL |
- TI_BANDGAP_FEATURE_COUNTER,
- .fclock_name = "bandgap_ts_fclk",
- .div_ck_name = "div_ts_ck",
- .conv_table = omap4460_adc_to_temp,
- .adc_start_val = OMAP4460_ADC_START_VALUE,
- .adc_end_val = OMAP4460_ADC_END_VALUE,
- .expose_sensor = ti_thermal_expose_sensor,
- .remove_sensor = ti_thermal_remove_sensor,
- .report_temperature = ti_thermal_report_sensor_temperature,
- .sensors = {
- {
- .registers = &omap4460_mpu_temp_sensor_registers,
- .ts_data = &omap4460_mpu_temp_sensor_data,
- .domain = "cpu",
- .slope = OMAP_GRADIENT_SLOPE_4460,
- .constant = OMAP_GRADIENT_CONST_4460,
- .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_4460,
- .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_4460,
- .register_cooling = ti_thermal_register_cpu_cooling,
- .unregister_cooling = ti_thermal_unregister_cpu_cooling,
- },
- },
- .sensor_count = 1,
-};
-
-/* OMAP4470 data */
-const struct ti_bandgap_data omap4470_data = {
- .features = TI_BANDGAP_FEATURE_TSHUT |
- TI_BANDGAP_FEATURE_TSHUT_CONFIG |
- TI_BANDGAP_FEATURE_TALERT |
- TI_BANDGAP_FEATURE_MODE_CONFIG |
- TI_BANDGAP_FEATURE_POWER_SWITCH |
- TI_BANDGAP_FEATURE_CLK_CTRL |
- TI_BANDGAP_FEATURE_COUNTER,
- .fclock_name = "bandgap_ts_fclk",
- .div_ck_name = "div_ts_ck",
- .conv_table = omap4460_adc_to_temp,
- .adc_start_val = OMAP4460_ADC_START_VALUE,
- .adc_end_val = OMAP4460_ADC_END_VALUE,
- .expose_sensor = ti_thermal_expose_sensor,
- .remove_sensor = ti_thermal_remove_sensor,
- .report_temperature = ti_thermal_report_sensor_temperature,
- .sensors = {
- {
- .registers = &omap4460_mpu_temp_sensor_registers,
- .ts_data = &omap4460_mpu_temp_sensor_data,
- .domain = "cpu",
- .slope = OMAP_GRADIENT_SLOPE_4470,
- .constant = OMAP_GRADIENT_CONST_4470,
- .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_4470,
- .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_4470,
- .register_cooling = ti_thermal_register_cpu_cooling,
- .unregister_cooling = ti_thermal_unregister_cpu_cooling,
- },
- },
- .sensor_count = 1,
-};
+++ /dev/null
-/*
- * OMAP4xxx bandgap registers, bitfields and temperature definitions
- *
- * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
- * Contact:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-#ifndef __OMAP4XXX_BANDGAP_H
-#define __OMAP4XXX_BANDGAP_H
-
-/**
- * *** OMAP4430 ***
- *
- * Below, in sequence, are the Register definitions,
- * the bitfields and the temperature definitions for OMAP4430.
- */
-
-/**
- * OMAP4430 register definitions
- *
- * Registers are defined as offsets. The offsets are
- * relative to FUSE_OPP_BGAP on 4430.
- */
-
-/* OMAP4430.FUSE_OPP_BGAP */
-#define OMAP4430_FUSE_OPP_BGAP 0x0
-
-/* OMAP4430.TEMP_SENSOR */
-#define OMAP4430_TEMP_SENSOR_CTRL_OFFSET 0xCC
-
-/**
- * Register and bit definitions for OMAP4430
- *
- * All the macros bellow define the required bits for
- * controlling temperature on OMAP4430. Bit defines are
- * grouped by register.
- */
-
-/* OMAP4430.TEMP_SENSOR bits */
-#define OMAP4430_BGAP_TEMPSOFF_MASK BIT(12)
-#define OMAP4430_BGAP_TSHUT_MASK BIT(11)
-#define OMAP4430_SINGLE_MODE_MASK BIT(10)
-#define OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK BIT(9)
-#define OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK BIT(8)
-#define OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK (0xff << 0)
-
-/**
- * Temperature limits and thresholds for OMAP4430
- *
- * All the macros bellow are definitions for handling the
- * ADC conversions and representation of temperature limits
- * and thresholds for OMAP4430.
- */
-
-/* ADC conversion table limits */
-#define OMAP4430_ADC_START_VALUE 0
-#define OMAP4430_ADC_END_VALUE 127
-/* bandgap clock limits (no control on 4430) */
-#define OMAP4430_MAX_FREQ 32768
-#define OMAP4430_MIN_FREQ 32768
-/* sensor limits */
-#define OMAP4430_MIN_TEMP -40000
-#define OMAP4430_MAX_TEMP 125000
-#define OMAP4430_HYST_VAL 5000
-
-/**
- * *** OMAP4460 *** Applicable for OMAP4470
- *
- * Below, in sequence, are the Register definitions,
- * the bitfields and the temperature definitions for OMAP4460.
- */
-
-/**
- * OMAP4460 register definitions
- *
- * Registers are defined as offsets. The offsets are
- * relative to FUSE_OPP_BGAP on 4460.
- */
-
-/* OMAP4460.FUSE_OPP_BGAP */
-#define OMAP4460_FUSE_OPP_BGAP 0x0
-
-/* OMAP4460.TEMP_SENSOR */
-#define OMAP4460_TEMP_SENSOR_CTRL_OFFSET 0xCC
-
-/* OMAP4460.BANDGAP_CTRL */
-#define OMAP4460_BGAP_CTRL_OFFSET 0x118
-
-/* OMAP4460.BANDGAP_COUNTER */
-#define OMAP4460_BGAP_COUNTER_OFFSET 0x11C
-
-/* OMAP4460.BANDGAP_THRESHOLD */
-#define OMAP4460_BGAP_THRESHOLD_OFFSET 0x120
-
-/* OMAP4460.TSHUT_THRESHOLD */
-#define OMAP4460_BGAP_TSHUT_OFFSET 0x124
-
-/* OMAP4460.BANDGAP_STATUS */
-#define OMAP4460_BGAP_STATUS_OFFSET 0x128
-
-/**
- * Register bitfields for OMAP4460
- *
- * All the macros bellow define the required bits for
- * controlling temperature on OMAP4460. Bit defines are
- * grouped by register.
- */
-/* OMAP4460.TEMP_SENSOR bits */
-#define OMAP4460_BGAP_TEMPSOFF_MASK BIT(13)
-#define OMAP4460_BGAP_TEMP_SENSOR_SOC_MASK BIT(11)
-#define OMAP4460_BGAP_TEMP_SENSOR_EOCZ_MASK BIT(10)
-#define OMAP4460_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
-
-/* OMAP4460.BANDGAP_CTRL bits */
-#define OMAP4460_SINGLE_MODE_MASK BIT(31)
-#define OMAP4460_MASK_HOT_MASK BIT(1)
-#define OMAP4460_MASK_COLD_MASK BIT(0)
-
-/* OMAP4460.BANDGAP_COUNTER bits */
-#define OMAP4460_COUNTER_MASK (0xffffff << 0)
-
-/* OMAP4460.BANDGAP_THRESHOLD bits */
-#define OMAP4460_T_HOT_MASK (0x3ff << 16)
-#define OMAP4460_T_COLD_MASK (0x3ff << 0)
-
-/* OMAP4460.TSHUT_THRESHOLD bits */
-#define OMAP4460_TSHUT_HOT_MASK (0x3ff << 16)
-#define OMAP4460_TSHUT_COLD_MASK (0x3ff << 0)
-
-/* OMAP4460.BANDGAP_STATUS bits */
-#define OMAP4460_CLEAN_STOP_MASK BIT(3)
-#define OMAP4460_BGAP_ALERT_MASK BIT(2)
-#define OMAP4460_HOT_FLAG_MASK BIT(1)
-#define OMAP4460_COLD_FLAG_MASK BIT(0)
-
-/**
- * Temperature limits and thresholds for OMAP4460
- *
- * All the macros bellow are definitions for handling the
- * ADC conversions and representation of temperature limits
- * and thresholds for OMAP4460.
- */
-
-/* ADC conversion table limits */
-#define OMAP4460_ADC_START_VALUE 530
-#define OMAP4460_ADC_END_VALUE 932
-/* bandgap clock limits */
-#define OMAP4460_MAX_FREQ 1500000
-#define OMAP4460_MIN_FREQ 1000000
-/* sensor limits */
-#define OMAP4460_MIN_TEMP -40000
-#define OMAP4460_MAX_TEMP 123000
-#define OMAP4460_HYST_VAL 5000
-/* interrupts thresholds */
-#define OMAP4460_TSHUT_HOT 900 /* 122 deg C */
-#define OMAP4460_TSHUT_COLD 895 /* 100 deg C */
-#define OMAP4460_T_HOT 800 /* 73 deg C */
-#define OMAP4460_T_COLD 795 /* 71 deg C */
-
-#endif /* __OMAP4XXX_BANDGAP_H */
+++ /dev/null
-/*
- * OMAP5 thermal driver.
- *
- * Copyright (C) 2011-2012 Texas Instruments Inc.
- * Contact:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include "ti-thermal.h"
-#include "ti-bandgap.h"
-#include "omap5xxx-bandgap.h"
-
-/*
- * OMAP5430 has three instances of thermal sensor for MPU, GPU & CORE,
- * need to describe the individual registers and bit fields.
- */
-
-/*
- * OMAP5430 MPU thermal sensor register offset and bit-fields
- */
-static struct temp_sensor_registers
-omap5430_mpu_temp_sensor_registers = {
- .temp_sensor_ctrl = OMAP5430_TEMP_SENSOR_MPU_OFFSET,
- .bgap_tempsoff_mask = OMAP5430_BGAP_TEMPSOFF_MASK,
- .bgap_eocz_mask = OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK,
- .bgap_dtemp_mask = OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK,
-
- .bgap_mask_ctrl = OMAP5430_BGAP_CTRL_OFFSET,
- .mask_hot_mask = OMAP5430_MASK_HOT_MPU_MASK,
- .mask_cold_mask = OMAP5430_MASK_COLD_MPU_MASK,
- .mask_sidlemode_mask = OMAP5430_MASK_SIDLEMODE_MASK,
- .mask_counter_delay_mask = OMAP5430_MASK_COUNTER_DELAY_MASK,
- .mask_freeze_mask = OMAP5430_MASK_FREEZE_MPU_MASK,
- .mask_clear_mask = OMAP5430_MASK_CLEAR_MPU_MASK,
- .mask_clear_accum_mask = OMAP5430_MASK_CLEAR_ACCUM_MPU_MASK,
-
-
- .bgap_counter = OMAP5430_BGAP_CTRL_OFFSET,
- .counter_mask = OMAP5430_COUNTER_MASK,
-
- .bgap_threshold = OMAP5430_BGAP_THRESHOLD_MPU_OFFSET,
- .threshold_thot_mask = OMAP5430_T_HOT_MASK,
- .threshold_tcold_mask = OMAP5430_T_COLD_MASK,
-
- .tshut_threshold = OMAP5430_BGAP_TSHUT_MPU_OFFSET,
- .tshut_hot_mask = OMAP5430_TSHUT_HOT_MASK,
- .tshut_cold_mask = OMAP5430_TSHUT_COLD_MASK,
-
- .bgap_status = OMAP5430_BGAP_STATUS_OFFSET,
- .status_clean_stop_mask = 0x0,
- .status_bgap_alert_mask = OMAP5430_BGAP_ALERT_MASK,
- .status_hot_mask = OMAP5430_HOT_MPU_FLAG_MASK,
- .status_cold_mask = OMAP5430_COLD_MPU_FLAG_MASK,
-
- .bgap_cumul_dtemp = OMAP5430_BGAP_CUMUL_DTEMP_MPU_OFFSET,
- .ctrl_dtemp_0 = OMAP5430_BGAP_DTEMP_MPU_0_OFFSET,
- .ctrl_dtemp_1 = OMAP5430_BGAP_DTEMP_MPU_1_OFFSET,
- .ctrl_dtemp_2 = OMAP5430_BGAP_DTEMP_MPU_2_OFFSET,
- .ctrl_dtemp_3 = OMAP5430_BGAP_DTEMP_MPU_3_OFFSET,
- .ctrl_dtemp_4 = OMAP5430_BGAP_DTEMP_MPU_4_OFFSET,
- .bgap_efuse = OMAP5430_FUSE_OPP_BGAP_MPU,
-};
-
-/*
- * OMAP5430 GPU thermal sensor register offset and bit-fields
- */
-static struct temp_sensor_registers
-omap5430_gpu_temp_sensor_registers = {
- .temp_sensor_ctrl = OMAP5430_TEMP_SENSOR_GPU_OFFSET,
- .bgap_tempsoff_mask = OMAP5430_BGAP_TEMPSOFF_MASK,
- .bgap_eocz_mask = OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK,
- .bgap_dtemp_mask = OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK,
-
- .bgap_mask_ctrl = OMAP5430_BGAP_CTRL_OFFSET,
- .mask_hot_mask = OMAP5430_MASK_HOT_GPU_MASK,
- .mask_cold_mask = OMAP5430_MASK_COLD_GPU_MASK,
- .mask_sidlemode_mask = OMAP5430_MASK_SIDLEMODE_MASK,
- .mask_counter_delay_mask = OMAP5430_MASK_COUNTER_DELAY_MASK,
- .mask_freeze_mask = OMAP5430_MASK_FREEZE_GPU_MASK,
- .mask_clear_mask = OMAP5430_MASK_CLEAR_GPU_MASK,
- .mask_clear_accum_mask = OMAP5430_MASK_CLEAR_ACCUM_GPU_MASK,
-
- .bgap_counter = OMAP5430_BGAP_CTRL_OFFSET,
- .counter_mask = OMAP5430_COUNTER_MASK,
-
- .bgap_threshold = OMAP5430_BGAP_THRESHOLD_GPU_OFFSET,
- .threshold_thot_mask = OMAP5430_T_HOT_MASK,
- .threshold_tcold_mask = OMAP5430_T_COLD_MASK,
-
- .tshut_threshold = OMAP5430_BGAP_TSHUT_GPU_OFFSET,
- .tshut_hot_mask = OMAP5430_TSHUT_HOT_MASK,
- .tshut_cold_mask = OMAP5430_TSHUT_COLD_MASK,
-
- .bgap_status = OMAP5430_BGAP_STATUS_OFFSET,
- .status_clean_stop_mask = 0x0,
- .status_bgap_alert_mask = OMAP5430_BGAP_ALERT_MASK,
- .status_hot_mask = OMAP5430_HOT_GPU_FLAG_MASK,
- .status_cold_mask = OMAP5430_COLD_GPU_FLAG_MASK,
-
- .bgap_cumul_dtemp = OMAP5430_BGAP_CUMUL_DTEMP_GPU_OFFSET,
- .ctrl_dtemp_0 = OMAP5430_BGAP_DTEMP_GPU_0_OFFSET,
- .ctrl_dtemp_1 = OMAP5430_BGAP_DTEMP_GPU_1_OFFSET,
- .ctrl_dtemp_2 = OMAP5430_BGAP_DTEMP_GPU_2_OFFSET,
- .ctrl_dtemp_3 = OMAP5430_BGAP_DTEMP_GPU_3_OFFSET,
- .ctrl_dtemp_4 = OMAP5430_BGAP_DTEMP_GPU_4_OFFSET,
-
- .bgap_efuse = OMAP5430_FUSE_OPP_BGAP_GPU,
-};
-
-/*
- * OMAP5430 CORE thermal sensor register offset and bit-fields
- */
-static struct temp_sensor_registers
-omap5430_core_temp_sensor_registers = {
- .temp_sensor_ctrl = OMAP5430_TEMP_SENSOR_CORE_OFFSET,
- .bgap_tempsoff_mask = OMAP5430_BGAP_TEMPSOFF_MASK,
- .bgap_eocz_mask = OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK,
- .bgap_dtemp_mask = OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK,
-
- .bgap_mask_ctrl = OMAP5430_BGAP_CTRL_OFFSET,
- .mask_hot_mask = OMAP5430_MASK_HOT_CORE_MASK,
- .mask_cold_mask = OMAP5430_MASK_COLD_CORE_MASK,
- .mask_sidlemode_mask = OMAP5430_MASK_SIDLEMODE_MASK,
- .mask_counter_delay_mask = OMAP5430_MASK_COUNTER_DELAY_MASK,
- .mask_freeze_mask = OMAP5430_MASK_FREEZE_CORE_MASK,
- .mask_clear_mask = OMAP5430_MASK_CLEAR_CORE_MASK,
- .mask_clear_accum_mask = OMAP5430_MASK_CLEAR_ACCUM_CORE_MASK,
-
- .bgap_counter = OMAP5430_BGAP_CTRL_OFFSET,
- .counter_mask = OMAP5430_COUNTER_MASK,
-
- .bgap_threshold = OMAP5430_BGAP_THRESHOLD_CORE_OFFSET,
- .threshold_thot_mask = OMAP5430_T_HOT_MASK,
- .threshold_tcold_mask = OMAP5430_T_COLD_MASK,
-
- .tshut_threshold = OMAP5430_BGAP_TSHUT_CORE_OFFSET,
- .tshut_hot_mask = OMAP5430_TSHUT_HOT_MASK,
- .tshut_cold_mask = OMAP5430_TSHUT_COLD_MASK,
-
- .bgap_status = OMAP5430_BGAP_STATUS_OFFSET,
- .status_clean_stop_mask = 0x0,
- .status_bgap_alert_mask = OMAP5430_BGAP_ALERT_MASK,
- .status_hot_mask = OMAP5430_HOT_CORE_FLAG_MASK,
- .status_cold_mask = OMAP5430_COLD_CORE_FLAG_MASK,
-
- .bgap_cumul_dtemp = OMAP5430_BGAP_CUMUL_DTEMP_CORE_OFFSET,
- .ctrl_dtemp_0 = OMAP5430_BGAP_DTEMP_CORE_0_OFFSET,
- .ctrl_dtemp_1 = OMAP5430_BGAP_DTEMP_CORE_1_OFFSET,
- .ctrl_dtemp_2 = OMAP5430_BGAP_DTEMP_CORE_2_OFFSET,
- .ctrl_dtemp_3 = OMAP5430_BGAP_DTEMP_CORE_3_OFFSET,
- .ctrl_dtemp_4 = OMAP5430_BGAP_DTEMP_CORE_4_OFFSET,
-
- .bgap_efuse = OMAP5430_FUSE_OPP_BGAP_CORE,
-};
-
-/* Thresholds and limits for OMAP5430 MPU temperature sensor */
-static struct temp_sensor_data omap5430_mpu_temp_sensor_data = {
- .tshut_hot = OMAP5430_MPU_TSHUT_HOT,
- .tshut_cold = OMAP5430_MPU_TSHUT_COLD,
- .t_hot = OMAP5430_MPU_T_HOT,
- .t_cold = OMAP5430_MPU_T_COLD,
- .min_freq = OMAP5430_MPU_MIN_FREQ,
- .max_freq = OMAP5430_MPU_MAX_FREQ,
- .max_temp = OMAP5430_MPU_MAX_TEMP,
- .min_temp = OMAP5430_MPU_MIN_TEMP,
- .hyst_val = OMAP5430_MPU_HYST_VAL,
- .update_int1 = 1000,
- .update_int2 = 2000,
-};
-
-/* Thresholds and limits for OMAP5430 GPU temperature sensor */
-static struct temp_sensor_data omap5430_gpu_temp_sensor_data = {
- .tshut_hot = OMAP5430_GPU_TSHUT_HOT,
- .tshut_cold = OMAP5430_GPU_TSHUT_COLD,
- .t_hot = OMAP5430_GPU_T_HOT,
- .t_cold = OMAP5430_GPU_T_COLD,
- .min_freq = OMAP5430_GPU_MIN_FREQ,
- .max_freq = OMAP5430_GPU_MAX_FREQ,
- .max_temp = OMAP5430_GPU_MAX_TEMP,
- .min_temp = OMAP5430_GPU_MIN_TEMP,
- .hyst_val = OMAP5430_GPU_HYST_VAL,
- .update_int1 = 1000,
- .update_int2 = 2000,
-};
-
-/* Thresholds and limits for OMAP5430 CORE temperature sensor */
-static struct temp_sensor_data omap5430_core_temp_sensor_data = {
- .tshut_hot = OMAP5430_CORE_TSHUT_HOT,
- .tshut_cold = OMAP5430_CORE_TSHUT_COLD,
- .t_hot = OMAP5430_CORE_T_HOT,
- .t_cold = OMAP5430_CORE_T_COLD,
- .min_freq = OMAP5430_CORE_MIN_FREQ,
- .max_freq = OMAP5430_CORE_MAX_FREQ,
- .max_temp = OMAP5430_CORE_MAX_TEMP,
- .min_temp = OMAP5430_CORE_MIN_TEMP,
- .hyst_val = OMAP5430_CORE_HYST_VAL,
- .update_int1 = 1000,
- .update_int2 = 2000,
-};
-
-/*
- * OMAP54xx ES2.0 : Temperature values in milli degree celsius
- * ADC code values from 540 to 945
- */
-static int
-omap5430_adc_to_temp[
- OMAP5430_ADC_END_VALUE - OMAP5430_ADC_START_VALUE + 1] = {
- /* Index 540 - 549 */
- -40000, -40000, -40000, -40000, -39800, -39400, -39000, -38600, -38200,
- -37800,
- /* Index 550 - 559 */
- -37400, -37000, -36600, -36200, -35800, -35300, -34700, -34200, -33800,
- -33400,
- /* Index 560 - 569 */
- -33000, -32600, -32200, -31800, -31400, -31000, -30600, -30200, -29800,
- -29400,
- /* Index 570 - 579 */
- -29000, -28600, -28200, -27700, -27100, -26600, -26200, -25800, -25400,
- -25000,
- /* Index 580 - 589 */
- -24600, -24200, -23800, -23400, -23000, -22600, -22200, -21600, -21400,
- -21000,
- /* Index 590 - 599 */
- -20500, -19900, -19400, -19000, -18600, -18200, -17800, -17400, -17000,
- -16600,
- /* Index 600 - 609 */
- -16200, -15800, -15400, -15000, -14600, -14200, -13800, -13400, -13000,
- -12500,
- /* Index 610 - 619 */
- -11900, -11400, -11000, -10600, -10200, -9800, -9400, -9000, -8600,
- -8200,
- /* Index 620 - 629 */
- -7800, -7400, -7000, -6600, -6200, -5800, -5400, -5000, -4500, -3900,
- /* Index 630 - 639 */
- -3400, -3000, -2600, -2200, -1800, -1400, -1000, -600, -200, 200,
- /* Index 640 - 649 */
- 600, 1000, 1400, 1800, 2200, 2600, 3000, 3400, 3900, 4500,
- /* Index 650 - 659 */
- 5000, 5400, 5800, 6200, 6600, 7000, 7400, 7800, 8200, 8600,
- /* Index 660 - 669 */
- 9000, 9400, 9800, 10200, 10600, 11000, 11400, 11800, 12200, 12700,
- /* Index 670 - 679 */
- 13300, 13800, 14200, 14600, 15000, 15400, 15800, 16200, 16600, 17000,
- /* Index 680 - 689 */
- 17400, 17800, 18200, 18600, 19000, 19400, 19800, 20200, 20600, 21100,
- /* Index 690 - 699 */
- 21400, 21900, 22500, 23000, 23400, 23800, 24200, 24600, 25000, 25400,
- /* Index 700 - 709 */
- 25800, 26200, 26600, 27000, 27400, 27800, 28200, 28600, 29000, 29400,
- /* Index 710 - 719 */
- 29800, 30200, 30600, 31000, 31400, 31900, 32500, 33000, 33400, 33800,
- /* Index 720 - 729 */
- 34200, 34600, 35000, 35400, 35800, 36200, 36600, 37000, 37400, 37800,
- /* Index 730 - 739 */
- 38200, 38600, 39000, 39400, 39800, 40200, 40600, 41000, 41400, 41800,
- /* Index 740 - 749 */
- 42200, 42600, 43100, 43700, 44200, 44600, 45000, 45400, 45800, 46200,
- /* Index 750 - 759 */
- 46600, 47000, 47400, 47800, 48200, 48600, 49000, 49400, 49800, 50200,
- /* Index 760 - 769 */
- 50600, 51000, 51400, 51800, 52200, 52600, 53000, 53400, 53800, 54200,
- /* Index 770 - 779 */
- 54600, 55000, 55400, 55900, 56500, 57000, 57400, 57800, 58200, 58600,
- /* Index 780 - 789 */
- 59000, 59400, 59800, 60200, 60600, 61000, 61400, 61800, 62200, 62600,
- /* Index 790 - 799 */
- 63000, 63400, 63800, 64200, 64600, 65000, 65400, 65800, 66200, 66600,
- /* Index 800 - 809 */
- 67000, 67400, 67800, 68200, 68600, 69000, 69400, 69800, 70200, 70600,
- /* Index 810 - 819 */
- 71000, 71500, 72100, 72600, 73000, 73400, 73800, 74200, 74600, 75000,
- /* Index 820 - 829 */
- 75400, 75800, 76200, 76600, 77000, 77400, 77800, 78200, 78600, 79000,
- /* Index 830 - 839 */
- 79400, 79800, 80200, 80600, 81000, 81400, 81800, 82200, 82600, 83000,
- /* Index 840 - 849 */
- 83400, 83800, 84200, 84600, 85000, 85400, 85800, 86200, 86600, 87000,
- /* Index 850 - 859 */
- 87400, 87800, 88200, 88600, 89000, 89400, 89800, 90200, 90600, 91000,
- /* Index 860 - 869 */
- 91400, 91800, 92200, 92600, 93000, 93400, 93800, 94200, 94600, 95000,
- /* Index 870 - 879 */
- 95400, 95800, 96200, 96600, 97000, 97500, 98100, 98600, 99000, 99400,
- /* Index 880 - 889 */
- 99800, 100200, 100600, 101000, 101400, 101800, 102200, 102600, 103000,
- 103400,
- /* Index 890 - 899 */
- 103800, 104200, 104600, 105000, 105400, 105800, 106200, 106600, 107000,
- 107400,
- /* Index 900 - 909 */
- 107800, 108200, 108600, 109000, 109400, 109800, 110200, 110600, 111000,
- 111400,
- /* Index 910 - 919 */
- 111800, 112200, 112600, 113000, 113400, 113800, 114200, 114600, 115000,
- 115400,
- /* Index 920 - 929 */
- 115800, 116200, 116600, 117000, 117400, 117800, 118200, 118600, 119000,
- 119400,
- /* Index 930 - 939 */
- 119800, 120200, 120600, 121000, 121400, 121800, 122400, 122600, 123000,
- 123400,
- /* Index 940 - 945 */
- 123800, 1242000, 124600, 124900, 125000, 125000,
-};
-
-/* OMAP54xx ES2.0 data */
-const struct ti_bandgap_data omap5430_data = {
- .features = TI_BANDGAP_FEATURE_TSHUT_CONFIG |
- TI_BANDGAP_FEATURE_FREEZE_BIT |
- TI_BANDGAP_FEATURE_TALERT |
- TI_BANDGAP_FEATURE_COUNTER_DELAY |
- TI_BANDGAP_FEATURE_HISTORY_BUFFER,
- .fclock_name = "l3instr_ts_gclk_div",
- .div_ck_name = "l3instr_ts_gclk_div",
- .conv_table = omap5430_adc_to_temp,
- .adc_start_val = OMAP5430_ADC_START_VALUE,
- .adc_end_val = OMAP5430_ADC_END_VALUE,
- .expose_sensor = ti_thermal_expose_sensor,
- .remove_sensor = ti_thermal_remove_sensor,
- .report_temperature = ti_thermal_report_sensor_temperature,
- .sensors = {
- {
- .registers = &omap5430_mpu_temp_sensor_registers,
- .ts_data = &omap5430_mpu_temp_sensor_data,
- .domain = "cpu",
- .register_cooling = ti_thermal_register_cpu_cooling,
- .unregister_cooling = ti_thermal_unregister_cpu_cooling,
- .slope = OMAP_GRADIENT_SLOPE_5430_CPU,
- .constant = OMAP_GRADIENT_CONST_5430_CPU,
- .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_5430_CPU,
- .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_5430_CPU,
- },
- {
- .registers = &omap5430_gpu_temp_sensor_registers,
- .ts_data = &omap5430_gpu_temp_sensor_data,
- .domain = "gpu",
- .slope = OMAP_GRADIENT_SLOPE_5430_GPU,
- .constant = OMAP_GRADIENT_CONST_5430_GPU,
- .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_5430_GPU,
- .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_5430_GPU,
- },
- {
- .registers = &omap5430_core_temp_sensor_registers,
- .ts_data = &omap5430_core_temp_sensor_data,
- .domain = "core",
- },
- },
- .sensor_count = 3,
-};
+++ /dev/null
-/*
- * OMAP5xxx bandgap registers, bitfields and temperature definitions
- *
- * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
- * Contact:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-#ifndef __OMAP5XXX_BANDGAP_H
-#define __OMAP5XXX_BANDGAP_H
-
-/**
- * *** OMAP5430 ***
- *
- * Below, in sequence, are the Register definitions,
- * the bitfields and the temperature definitions for OMAP5430.
- */
-
-/**
- * OMAP5430 register definitions
- *
- * Registers are defined as offsets. The offsets are
- * relative to FUSE_OPP_BGAP_GPU on 5430.
- *
- * Register below are grouped by domain (not necessarily in offset order)
- */
-
-/* OMAP5430.GPU register offsets */
-#define OMAP5430_FUSE_OPP_BGAP_GPU 0x0
-#define OMAP5430_TEMP_SENSOR_GPU_OFFSET 0x150
-#define OMAP5430_BGAP_THRESHOLD_GPU_OFFSET 0x1A8
-#define OMAP5430_BGAP_TSHUT_GPU_OFFSET 0x1B4
-#define OMAP5430_BGAP_CUMUL_DTEMP_GPU_OFFSET 0x1C0
-#define OMAP5430_BGAP_DTEMP_GPU_0_OFFSET 0x1F4
-#define OMAP5430_BGAP_DTEMP_GPU_1_OFFSET 0x1F8
-#define OMAP5430_BGAP_DTEMP_GPU_2_OFFSET 0x1FC
-#define OMAP5430_BGAP_DTEMP_GPU_3_OFFSET 0x200
-#define OMAP5430_BGAP_DTEMP_GPU_4_OFFSET 0x204
-
-/* OMAP5430.MPU register offsets */
-#define OMAP5430_FUSE_OPP_BGAP_MPU 0x4
-#define OMAP5430_TEMP_SENSOR_MPU_OFFSET 0x14C
-#define OMAP5430_BGAP_THRESHOLD_MPU_OFFSET 0x1A4
-#define OMAP5430_BGAP_TSHUT_MPU_OFFSET 0x1B0
-#define OMAP5430_BGAP_CUMUL_DTEMP_MPU_OFFSET 0x1BC
-#define OMAP5430_BGAP_DTEMP_MPU_0_OFFSET 0x1E0
-#define OMAP5430_BGAP_DTEMP_MPU_1_OFFSET 0x1E4
-#define OMAP5430_BGAP_DTEMP_MPU_2_OFFSET 0x1E8
-#define OMAP5430_BGAP_DTEMP_MPU_3_OFFSET 0x1EC
-#define OMAP5430_BGAP_DTEMP_MPU_4_OFFSET 0x1F0
-
-/* OMAP5430.MPU register offsets */
-#define OMAP5430_FUSE_OPP_BGAP_CORE 0x8
-#define OMAP5430_TEMP_SENSOR_CORE_OFFSET 0x154
-#define OMAP5430_BGAP_THRESHOLD_CORE_OFFSET 0x1AC
-#define OMAP5430_BGAP_TSHUT_CORE_OFFSET 0x1B8
-#define OMAP5430_BGAP_CUMUL_DTEMP_CORE_OFFSET 0x1C4
-#define OMAP5430_BGAP_DTEMP_CORE_0_OFFSET 0x208
-#define OMAP5430_BGAP_DTEMP_CORE_1_OFFSET 0x20C
-#define OMAP5430_BGAP_DTEMP_CORE_2_OFFSET 0x210
-#define OMAP5430_BGAP_DTEMP_CORE_3_OFFSET 0x214
-#define OMAP5430_BGAP_DTEMP_CORE_4_OFFSET 0x218
-
-/* OMAP5430.common register offsets */
-#define OMAP5430_BGAP_CTRL_OFFSET 0x1A0
-#define OMAP5430_BGAP_STATUS_OFFSET 0x1C8
-
-/**
- * Register bitfields for OMAP5430
- *
- * All the macros bellow define the required bits for
- * controlling temperature on OMAP5430. Bit defines are
- * grouped by register.
- */
-
-/* OMAP5430.TEMP_SENSOR */
-#define OMAP5430_BGAP_TEMP_SENSOR_SOC_MASK BIT(12)
-#define OMAP5430_BGAP_TEMPSOFF_MASK BIT(11)
-#define OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK BIT(10)
-#define OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
-
-/* OMAP5430.BANDGAP_CTRL */
-#define OMAP5430_MASK_SIDLEMODE_MASK (0x3 << 30)
-#define OMAP5430_MASK_COUNTER_DELAY_MASK (0x7 << 27)
-#define OMAP5430_MASK_FREEZE_CORE_MASK BIT(23)
-#define OMAP5430_MASK_FREEZE_GPU_MASK BIT(22)
-#define OMAP5430_MASK_FREEZE_MPU_MASK BIT(21)
-#define OMAP5430_MASK_CLEAR_CORE_MASK BIT(20)
-#define OMAP5430_MASK_CLEAR_GPU_MASK BIT(19)
-#define OMAP5430_MASK_CLEAR_MPU_MASK BIT(18)
-#define OMAP5430_MASK_CLEAR_ACCUM_CORE_MASK BIT(17)
-#define OMAP5430_MASK_CLEAR_ACCUM_GPU_MASK BIT(16)
-#define OMAP5430_MASK_CLEAR_ACCUM_MPU_MASK BIT(15)
-#define OMAP5430_MASK_HOT_CORE_MASK BIT(5)
-#define OMAP5430_MASK_COLD_CORE_MASK BIT(4)
-#define OMAP5430_MASK_HOT_GPU_MASK BIT(3)
-#define OMAP5430_MASK_COLD_GPU_MASK BIT(2)
-#define OMAP5430_MASK_HOT_MPU_MASK BIT(1)
-#define OMAP5430_MASK_COLD_MPU_MASK BIT(0)
-
-/* OMAP5430.BANDGAP_COUNTER */
-#define OMAP5430_COUNTER_MASK (0xffffff << 0)
-
-/* OMAP5430.BANDGAP_THRESHOLD */
-#define OMAP5430_T_HOT_MASK (0x3ff << 16)
-#define OMAP5430_T_COLD_MASK (0x3ff << 0)
-
-/* OMAP5430.TSHUT_THRESHOLD */
-#define OMAP5430_TSHUT_HOT_MASK (0x3ff << 16)
-#define OMAP5430_TSHUT_COLD_MASK (0x3ff << 0)
-
-/* OMAP5430.BANDGAP_CUMUL_DTEMP_MPU */
-#define OMAP5430_CUMUL_DTEMP_MPU_MASK (0xffffffff << 0)
-
-/* OMAP5430.BANDGAP_CUMUL_DTEMP_GPU */
-#define OMAP5430_CUMUL_DTEMP_GPU_MASK (0xffffffff << 0)
-
-/* OMAP5430.BANDGAP_CUMUL_DTEMP_CORE */
-#define OMAP5430_CUMUL_DTEMP_CORE_MASK (0xffffffff << 0)
-
-/* OMAP5430.BANDGAP_STATUS */
-#define OMAP5430_BGAP_ALERT_MASK BIT(31)
-#define OMAP5430_HOT_CORE_FLAG_MASK BIT(5)
-#define OMAP5430_COLD_CORE_FLAG_MASK BIT(4)
-#define OMAP5430_HOT_GPU_FLAG_MASK BIT(3)
-#define OMAP5430_COLD_GPU_FLAG_MASK BIT(2)
-#define OMAP5430_HOT_MPU_FLAG_MASK BIT(1)
-#define OMAP5430_COLD_MPU_FLAG_MASK BIT(0)
-
-/**
- * Temperature limits and thresholds for OMAP5430
- *
- * All the macros bellow are definitions for handling the
- * ADC conversions and representation of temperature limits
- * and thresholds for OMAP5430. Definitions are grouped
- * by temperature domain.
- */
-
-/* OMAP5430.common temperature definitions */
-/* ADC conversion table limits */
-#define OMAP5430_ADC_START_VALUE 540
-#define OMAP5430_ADC_END_VALUE 945
-
-/* OMAP5430.GPU temperature definitions */
-/* bandgap clock limits */
-#define OMAP5430_GPU_MAX_FREQ 1500000
-#define OMAP5430_GPU_MIN_FREQ 1000000
-/* sensor limits */
-#define OMAP5430_GPU_MIN_TEMP -40000
-#define OMAP5430_GPU_MAX_TEMP 125000
-#define OMAP5430_GPU_HYST_VAL 5000
-/* interrupts thresholds */
-#define OMAP5430_GPU_TSHUT_HOT 915
-#define OMAP5430_GPU_TSHUT_COLD 900
-#define OMAP5430_GPU_T_HOT 800
-#define OMAP5430_GPU_T_COLD 795
-
-/* OMAP5430.MPU temperature definitions */
-/* bandgap clock limits */
-#define OMAP5430_MPU_MAX_FREQ 1500000
-#define OMAP5430_MPU_MIN_FREQ 1000000
-/* sensor limits */
-#define OMAP5430_MPU_MIN_TEMP -40000
-#define OMAP5430_MPU_MAX_TEMP 125000
-#define OMAP5430_MPU_HYST_VAL 5000
-/* interrupts thresholds */
-#define OMAP5430_MPU_TSHUT_HOT 915
-#define OMAP5430_MPU_TSHUT_COLD 900
-#define OMAP5430_MPU_T_HOT 800
-#define OMAP5430_MPU_T_COLD 795
-
-/* OMAP5430.CORE temperature definitions */
-/* bandgap clock limits */
-#define OMAP5430_CORE_MAX_FREQ 1500000
-#define OMAP5430_CORE_MIN_FREQ 1000000
-/* sensor limits */
-#define OMAP5430_CORE_MIN_TEMP -40000
-#define OMAP5430_CORE_MAX_TEMP 125000
-#define OMAP5430_CORE_HYST_VAL 5000
-/* interrupts thresholds */
-#define OMAP5430_CORE_TSHUT_HOT 915
-#define OMAP5430_CORE_TSHUT_COLD 900
-#define OMAP5430_CORE_T_HOT 800
-#define OMAP5430_CORE_T_COLD 795
-
-#endif /* __OMAP5XXX_BANDGAP_H */
+++ /dev/null
-/*
- * TI Bandgap temperature sensor driver
- *
- * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
- * Author: J Keerthy <j-keerthy@ti.com>
- * Author: Moiz Sonasath <m-sonasath@ti.com>
- * Couple of fixes, DT and MFD adaptation:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/export.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/gpio.h>
-#include <linux/platform_device.h>
-#include <linux/err.h>
-#include <linux/types.h>
-#include <linux/spinlock.h>
-#include <linux/reboot.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/of_irq.h>
-#include <linux/io.h>
-
-#include "ti-bandgap.h"
-
-/*** Helper functions to access registers and their bitfields ***/
-
-/**
- * ti_bandgap_readl() - simple read helper function
- * @bgp: pointer to ti_bandgap structure
- * @reg: desired register (offset) to be read
- *
- * Helper function to read bandgap registers. It uses the io remapped area.
- * Return: the register value.
- */
-static u32 ti_bandgap_readl(struct ti_bandgap *bgp, u32 reg)
-{
- return readl(bgp->base + reg);
-}
-
-/**
- * ti_bandgap_writel() - simple write helper function
- * @bgp: pointer to ti_bandgap structure
- * @val: desired register value to be written
- * @reg: desired register (offset) to be written
- *
- * Helper function to write bandgap registers. It uses the io remapped area.
- */
-static void ti_bandgap_writel(struct ti_bandgap *bgp, u32 val, u32 reg)
-{
- writel(val, bgp->base + reg);
-}
-
-/**
- * DOC: macro to update bits.
- *
- * RMW_BITS() - used to read, modify and update bandgap bitfields.
- * The value passed will be shifted.
- */
-#define RMW_BITS(bgp, id, reg, mask, val) \
-do { \
- struct temp_sensor_registers *t; \
- u32 r; \
- \
- t = bgp->conf->sensors[(id)].registers; \
- r = ti_bandgap_readl(bgp, t->reg); \
- r &= ~t->mask; \
- r |= (val) << __ffs(t->mask); \
- ti_bandgap_writel(bgp, r, t->reg); \
-} while (0)
-
-/*** Basic helper functions ***/
-
-/**
- * ti_bandgap_power() - controls the power state of a bandgap device
- * @bgp: pointer to ti_bandgap structure
- * @on: desired power state (1 - on, 0 - off)
- *
- * Used to power on/off a bandgap device instance. Only used on those
- * that features tempsoff bit.
- *
- * Return: 0 on success, -ENOTSUPP if tempsoff is not supported.
- */
-static int ti_bandgap_power(struct ti_bandgap *bgp, bool on)
-{
- int i, ret = 0;
-
- if (!TI_BANDGAP_HAS(bgp, POWER_SWITCH)) {
- ret = -ENOTSUPP;
- goto exit;
- }
-
- for (i = 0; i < bgp->conf->sensor_count; i++)
- /* active on 0 */
- RMW_BITS(bgp, i, temp_sensor_ctrl, bgap_tempsoff_mask, !on);
-
-exit:
- return ret;
-}
-
-/**
- * ti_bandgap_read_temp() - helper function to read sensor temperature
- * @bgp: pointer to ti_bandgap structure
- * @id: bandgap sensor id
- *
- * Function to concentrate the steps to read sensor temperature register.
- * This function is desired because, depending on bandgap device version,
- * it might be needed to freeze the bandgap state machine, before fetching
- * the register value.
- *
- * Return: temperature in ADC values.
- */
-static u32 ti_bandgap_read_temp(struct ti_bandgap *bgp, int id)
-{
- struct temp_sensor_registers *tsr;
- u32 temp, reg;
-
- tsr = bgp->conf->sensors[id].registers;
- reg = tsr->temp_sensor_ctrl;
-
- if (TI_BANDGAP_HAS(bgp, FREEZE_BIT)) {
- RMW_BITS(bgp, id, bgap_mask_ctrl, mask_freeze_mask, 1);
- /*
- * In case we cannot read from cur_dtemp / dtemp_0,
- * then we read from the last valid temp read
- */
- reg = tsr->ctrl_dtemp_1;
- }
-
- /* read temperature */
- temp = ti_bandgap_readl(bgp, reg);
- temp &= tsr->bgap_dtemp_mask;
-
- if (TI_BANDGAP_HAS(bgp, FREEZE_BIT))
- RMW_BITS(bgp, id, bgap_mask_ctrl, mask_freeze_mask, 0);
-
- return temp;
-}
-
-/*** IRQ handlers ***/
-
-/**
- * ti_bandgap_talert_irq_handler() - handles Temperature alert IRQs
- * @irq: IRQ number
- * @data: private data (struct ti_bandgap *)
- *
- * This is the Talert handler. Use it only if bandgap device features
- * HAS(TALERT). This handler goes over all sensors and checks their
- * conditions and acts accordingly. In case there are events pending,
- * it will reset the event mask to wait for the opposite event (next event).
- * Every time there is a new event, it will be reported to thermal layer.
- *
- * Return: IRQ_HANDLED
- */
-static irqreturn_t ti_bandgap_talert_irq_handler(int irq, void *data)
-{
- struct ti_bandgap *bgp = data;
- struct temp_sensor_registers *tsr;
- u32 t_hot = 0, t_cold = 0, ctrl;
- int i;
-
- spin_lock(&bgp->lock);
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- tsr = bgp->conf->sensors[i].registers;
- ctrl = ti_bandgap_readl(bgp, tsr->bgap_status);
-
- /* Read the status of t_hot */
- t_hot = ctrl & tsr->status_hot_mask;
-
- /* Read the status of t_cold */
- t_cold = ctrl & tsr->status_cold_mask;
-
- if (!t_cold && !t_hot)
- continue;
-
- ctrl = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
- /*
- * One TALERT interrupt: Two sources
- * If the interrupt is due to t_hot then mask t_hot and
- * and unmask t_cold else mask t_cold and unmask t_hot
- */
- if (t_hot) {
- ctrl &= ~tsr->mask_hot_mask;
- ctrl |= tsr->mask_cold_mask;
- } else if (t_cold) {
- ctrl &= ~tsr->mask_cold_mask;
- ctrl |= tsr->mask_hot_mask;
- }
-
- ti_bandgap_writel(bgp, ctrl, tsr->bgap_mask_ctrl);
-
- dev_dbg(bgp->dev,
- "%s: IRQ from %s sensor: hotevent %d coldevent %d\n",
- __func__, bgp->conf->sensors[i].domain,
- t_hot, t_cold);
-
- /* report temperature to whom may concern */
- if (bgp->conf->report_temperature)
- bgp->conf->report_temperature(bgp, i);
- }
- spin_unlock(&bgp->lock);
-
- return IRQ_HANDLED;
-}
-
-/**
- * ti_bandgap_tshut_irq_handler() - handles Temperature shutdown signal
- * @irq: IRQ number
- * @data: private data (unused)
- *
- * This is the Tshut handler. Use it only if bandgap device features
- * HAS(TSHUT). If any sensor fires the Tshut signal, we simply shutdown
- * the system.
- *
- * Return: IRQ_HANDLED
- */
-static irqreturn_t ti_bandgap_tshut_irq_handler(int irq, void *data)
-{
- pr_emerg("%s: TSHUT temperature reached. Needs shut down...\n",
- __func__);
-
- orderly_poweroff(true);
-
- return IRQ_HANDLED;
-}
-
-/*** Helper functions which manipulate conversion ADC <-> mi Celsius ***/
-
-/**
- * ti_bandgap_adc_to_mcelsius() - converts an ADC value to mCelsius scale
- * @bgp: struct ti_bandgap pointer
- * @adc_val: value in ADC representation
- * @t: address where to write the resulting temperature in mCelsius
- *
- * Simple conversion from ADC representation to mCelsius. In case the ADC value
- * is out of the ADC conv table range, it returns -ERANGE, 0 on success.
- * The conversion table is indexed by the ADC values.
- *
- * Return: 0 if conversion was successful, else -ERANGE in case the @adc_val
- * argument is out of the ADC conv table range.
- */
-static
-int ti_bandgap_adc_to_mcelsius(struct ti_bandgap *bgp, int adc_val, int *t)
-{
- const struct ti_bandgap_data *conf = bgp->conf;
- int ret = 0;
-
- /* look up for temperature in the table and return the temperature */
- if (adc_val < conf->adc_start_val || adc_val > conf->adc_end_val) {
- ret = -ERANGE;
- goto exit;
- }
-
- *t = bgp->conf->conv_table[adc_val - conf->adc_start_val];
-
-exit:
- return ret;
-}
-
-/**
- * ti_bandgap_mcelsius_to_adc() - converts a mCelsius value to ADC scale
- * @bgp: struct ti_bandgap pointer
- * @temp: value in mCelsius
- * @adc: address where to write the resulting temperature in ADC representation
- *
- * Simple conversion from mCelsius to ADC values. In case the temp value
- * is out of the ADC conv table range, it returns -ERANGE, 0 on success.
- * The conversion table is indexed by the ADC values.
- *
- * Return: 0 if conversion was successful, else -ERANGE in case the @temp
- * argument is out of the ADC conv table range.
- */
-static
-int ti_bandgap_mcelsius_to_adc(struct ti_bandgap *bgp, long temp, int *adc)
-{
- const struct ti_bandgap_data *conf = bgp->conf;
- const int *conv_table = bgp->conf->conv_table;
- int high, low, mid, ret = 0;
-
- low = 0;
- high = conf->adc_end_val - conf->adc_start_val;
- mid = (high + low) / 2;
-
- if (temp < conv_table[low] || temp > conv_table[high]) {
- ret = -ERANGE;
- goto exit;
- }
-
- while (low < high) {
- if (temp < conv_table[mid])
- high = mid - 1;
- else
- low = mid + 1;
- mid = (low + high) / 2;
- }
-
- *adc = conf->adc_start_val + low;
-
-exit:
- return ret;
-}
-
-/**
- * ti_bandgap_add_hyst() - add hysteresis (in mCelsius) to an ADC value
- * @bgp: struct ti_bandgap pointer
- * @adc_val: temperature value in ADC representation
- * @hyst_val: hysteresis value in mCelsius
- * @sum: address where to write the resulting temperature (in ADC scale)
- *
- * Adds an hysteresis value (in mCelsius) to a ADC temperature value.
- *
- * Return: 0 on success, -ERANGE otherwise.
- */
-static
-int ti_bandgap_add_hyst(struct ti_bandgap *bgp, int adc_val, int hyst_val,
- u32 *sum)
-{
- int temp, ret;
-
- /*
- * Need to add in the mcelsius domain, so we have a temperature
- * the conv_table range
- */
- ret = ti_bandgap_adc_to_mcelsius(bgp, adc_val, &temp);
- if (ret < 0)
- goto exit;
-
- temp += hyst_val;
-
- ret = ti_bandgap_mcelsius_to_adc(bgp, temp, sum);
-
-exit:
- return ret;
-}
-
-/*** Helper functions handling device Alert/Shutdown signals ***/
-
-/**
- * ti_bandgap_unmask_interrupts() - unmasks the events of thot & tcold
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @t_hot: hot temperature value to trigger alert signal
- * @t_cold: cold temperature value to trigger alert signal
- *
- * Checks the requested t_hot and t_cold values and configures the IRQ event
- * masks accordingly. Call this function only if bandgap features HAS(TALERT).
- */
-static void ti_bandgap_unmask_interrupts(struct ti_bandgap *bgp, int id,
- u32 t_hot, u32 t_cold)
-{
- struct temp_sensor_registers *tsr;
- u32 temp, reg_val;
-
- /* Read the current on die temperature */
- temp = ti_bandgap_read_temp(bgp, id);
-
- tsr = bgp->conf->sensors[id].registers;
- reg_val = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
-
- if (temp < t_hot)
- reg_val |= tsr->mask_hot_mask;
- else
- reg_val &= ~tsr->mask_hot_mask;
-
- if (t_cold < temp)
- reg_val |= tsr->mask_cold_mask;
- else
- reg_val &= ~tsr->mask_cold_mask;
- ti_bandgap_writel(bgp, reg_val, tsr->bgap_mask_ctrl);
-}
-
-/**
- * ti_bandgap_update_alert_threshold() - sequence to update thresholds
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @val: value (ADC) of a new threshold
- * @hot: desired threshold to be updated. true if threshold hot, false if
- * threshold cold
- *
- * It will program the required thresholds (hot and cold) for TALERT signal.
- * This function can be used to update t_hot or t_cold, depending on @hot value.
- * It checks the resulting t_hot and t_cold values, based on the new passed @val
- * and configures the thresholds so that t_hot is always greater than t_cold.
- * Call this function only if bandgap features HAS(TALERT).
- *
- * Return: 0 if no error, else corresponding error
- */
-static int ti_bandgap_update_alert_threshold(struct ti_bandgap *bgp, int id,
- int val, bool hot)
-{
- struct temp_sensor_data *ts_data = bgp->conf->sensors[id].ts_data;
- struct temp_sensor_registers *tsr;
- u32 thresh_val, reg_val, t_hot, t_cold;
- int err = 0;
-
- tsr = bgp->conf->sensors[id].registers;
-
- /* obtain the current value */
- thresh_val = ti_bandgap_readl(bgp, tsr->bgap_threshold);
- t_cold = (thresh_val & tsr->threshold_tcold_mask) >>
- __ffs(tsr->threshold_tcold_mask);
- t_hot = (thresh_val & tsr->threshold_thot_mask) >>
- __ffs(tsr->threshold_thot_mask);
- if (hot)
- t_hot = val;
- else
- t_cold = val;
-
- if (t_cold > t_hot) {
- if (hot)
- err = ti_bandgap_add_hyst(bgp, t_hot,
- -ts_data->hyst_val,
- &t_cold);
- else
- err = ti_bandgap_add_hyst(bgp, t_cold,
- ts_data->hyst_val,
- &t_hot);
- }
-
- /* write the new threshold values */
- reg_val = thresh_val &
- ~(tsr->threshold_thot_mask | tsr->threshold_tcold_mask);
- reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask)) |
- (t_cold << __ffs(tsr->threshold_tcold_mask));
- ti_bandgap_writel(bgp, reg_val, tsr->bgap_threshold);
-
- if (err) {
- dev_err(bgp->dev, "failed to reprogram thot threshold\n");
- err = -EIO;
- goto exit;
- }
-
- ti_bandgap_unmask_interrupts(bgp, id, t_hot, t_cold);
-exit:
- return err;
-}
-
-/**
- * ti_bandgap_validate() - helper to check the sanity of a struct ti_bandgap
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- *
- * Checks if the bandgap pointer is valid and if the sensor id is also
- * applicable.
- *
- * Return: 0 if no errors, -EINVAL for invalid @bgp pointer or -ERANGE if
- * @id cannot index @bgp sensors.
- */
-static inline int ti_bandgap_validate(struct ti_bandgap *bgp, int id)
-{
- int ret = 0;
-
- if (IS_ERR_OR_NULL(bgp)) {
- pr_err("%s: invalid bandgap pointer\n", __func__);
- ret = -EINVAL;
- goto exit;
- }
-
- if ((id < 0) || (id >= bgp->conf->sensor_count)) {
- dev_err(bgp->dev, "%s: sensor id out of range (%d)\n",
- __func__, id);
- ret = -ERANGE;
- }
-
-exit:
- return ret;
-}
-
-/**
- * _ti_bandgap_write_threshold() - helper to update TALERT t_cold or t_hot
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @val: value (mCelsius) of a new threshold
- * @hot: desired threshold to be updated. true if threshold hot, false if
- * threshold cold
- *
- * It will update the required thresholds (hot and cold) for TALERT signal.
- * This function can be used to update t_hot or t_cold, depending on @hot value.
- * Validates the mCelsius range and update the requested threshold.
- * Call this function only if bandgap features HAS(TALERT).
- *
- * Return: 0 if no error, else corresponding error value.
- */
-static int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val,
- bool hot)
-{
- struct temp_sensor_data *ts_data;
- struct temp_sensor_registers *tsr;
- u32 adc_val;
- int ret;
-
- ret = ti_bandgap_validate(bgp, id);
- if (ret)
- goto exit;
-
- if (!TI_BANDGAP_HAS(bgp, TALERT)) {
- ret = -ENOTSUPP;
- goto exit;
- }
-
- ts_data = bgp->conf->sensors[id].ts_data;
- tsr = bgp->conf->sensors[id].registers;
- if (hot) {
- if (val < ts_data->min_temp + ts_data->hyst_val)
- ret = -EINVAL;
- } else {
- if (val > ts_data->max_temp + ts_data->hyst_val)
- ret = -EINVAL;
- }
-
- if (ret)
- goto exit;
-
- ret = ti_bandgap_mcelsius_to_adc(bgp, val, &adc_val);
- if (ret < 0)
- goto exit;
-
- spin_lock(&bgp->lock);
- ret = ti_bandgap_update_alert_threshold(bgp, id, adc_val, hot);
- spin_unlock(&bgp->lock);
-
-exit:
- return ret;
-}
-
-/**
- * _ti_bandgap_read_threshold() - helper to read TALERT t_cold or t_hot
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @val: value (mCelsius) of a threshold
- * @hot: desired threshold to be read. true if threshold hot, false if
- * threshold cold
- *
- * It will fetch the required thresholds (hot and cold) for TALERT signal.
- * This function can be used to read t_hot or t_cold, depending on @hot value.
- * Call this function only if bandgap features HAS(TALERT).
- *
- * Return: 0 if no error, -ENOTSUPP if it has no TALERT support, or the
- * corresponding error value if some operation fails.
- */
-static int _ti_bandgap_read_threshold(struct ti_bandgap *bgp, int id,
- int *val, bool hot)
-{
- struct temp_sensor_registers *tsr;
- u32 temp, mask;
- int ret = 0;
-
- ret = ti_bandgap_validate(bgp, id);
- if (ret)
- goto exit;
-
- if (!TI_BANDGAP_HAS(bgp, TALERT)) {
- ret = -ENOTSUPP;
- goto exit;
- }
-
- tsr = bgp->conf->sensors[id].registers;
- if (hot)
- mask = tsr->threshold_thot_mask;
- else
- mask = tsr->threshold_tcold_mask;
-
- temp = ti_bandgap_readl(bgp, tsr->bgap_threshold);
- temp = (temp & mask) >> __ffs(mask);
- ret |= ti_bandgap_adc_to_mcelsius(bgp, temp, &temp);
- if (ret) {
- dev_err(bgp->dev, "failed to read thot\n");
- ret = -EIO;
- goto exit;
- }
-
- *val = temp;
-
-exit:
- return ret;
-}
-
-/*** Exposed APIs ***/
-
-/**
- * ti_bandgap_read_thot() - reads sensor current thot
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @thot: resulting current thot value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot)
-{
- return _ti_bandgap_read_threshold(bgp, id, thot, true);
-}
-
-/**
- * ti_bandgap_write_thot() - sets sensor current thot
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @val: desired thot value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val)
-{
- return _ti_bandgap_write_threshold(bgp, id, val, true);
-}
-
-/**
- * ti_bandgap_read_tcold() - reads sensor current tcold
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @tcold: resulting current tcold value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold)
-{
- return _ti_bandgap_read_threshold(bgp, id, tcold, false);
-}
-
-/**
- * ti_bandgap_write_tcold() - sets the sensor tcold
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @val: desired tcold value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val)
-{
- return _ti_bandgap_write_threshold(bgp, id, val, false);
-}
-
-/**
- * ti_bandgap_read_counter() - read the sensor counter
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @interval: resulting update interval in miliseconds
- */
-static void ti_bandgap_read_counter(struct ti_bandgap *bgp, int id,
- int *interval)
-{
- struct temp_sensor_registers *tsr;
- int time;
-
- tsr = bgp->conf->sensors[id].registers;
- time = ti_bandgap_readl(bgp, tsr->bgap_counter);
- time = (time & tsr->counter_mask) >>
- __ffs(tsr->counter_mask);
- time = time * 1000 / bgp->clk_rate;
- *interval = time;
-}
-
-/**
- * ti_bandgap_read_counter_delay() - read the sensor counter delay
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @interval: resulting update interval in miliseconds
- */
-static void ti_bandgap_read_counter_delay(struct ti_bandgap *bgp, int id,
- int *interval)
-{
- struct temp_sensor_registers *tsr;
- int reg_val;
-
- tsr = bgp->conf->sensors[id].registers;
-
- reg_val = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
- reg_val = (reg_val & tsr->mask_counter_delay_mask) >>
- __ffs(tsr->mask_counter_delay_mask);
- switch (reg_val) {
- case 0:
- *interval = 0;
- break;
- case 1:
- *interval = 1;
- break;
- case 2:
- *interval = 10;
- break;
- case 3:
- *interval = 100;
- break;
- case 4:
- *interval = 250;
- break;
- case 5:
- *interval = 500;
- break;
- default:
- dev_warn(bgp->dev, "Wrong counter delay value read from register %X",
- reg_val);
- }
-}
-
-/**
- * ti_bandgap_read_update_interval() - read the sensor update interval
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @interval: resulting update interval in miliseconds
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id,
- int *interval)
-{
- int ret = 0;
-
- ret = ti_bandgap_validate(bgp, id);
- if (ret)
- goto exit;
-
- if (!TI_BANDGAP_HAS(bgp, COUNTER) &&
- !TI_BANDGAP_HAS(bgp, COUNTER_DELAY)) {
- ret = -ENOTSUPP;
- goto exit;
- }
-
- if (TI_BANDGAP_HAS(bgp, COUNTER)) {
- ti_bandgap_read_counter(bgp, id, interval);
- goto exit;
- }
-
- ti_bandgap_read_counter_delay(bgp, id, interval);
-exit:
- return ret;
-}
-
-/**
- * ti_bandgap_write_counter_delay() - set the counter_delay
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @interval: desired update interval in miliseconds
- *
- * Return: 0 on success or the proper error code
- */
-static int ti_bandgap_write_counter_delay(struct ti_bandgap *bgp, int id,
- u32 interval)
-{
- int rval;
-
- switch (interval) {
- case 0: /* Immediate conversion */
- rval = 0x0;
- break;
- case 1: /* Conversion after ever 1ms */
- rval = 0x1;
- break;
- case 10: /* Conversion after ever 10ms */
- rval = 0x2;
- break;
- case 100: /* Conversion after ever 100ms */
- rval = 0x3;
- break;
- case 250: /* Conversion after ever 250ms */
- rval = 0x4;
- break;
- case 500: /* Conversion after ever 500ms */
- rval = 0x5;
- break;
- default:
- dev_warn(bgp->dev, "Delay %d ms is not supported\n", interval);
- return -EINVAL;
- }
-
- spin_lock(&bgp->lock);
- RMW_BITS(bgp, id, bgap_mask_ctrl, mask_counter_delay_mask, rval);
- spin_unlock(&bgp->lock);
-
- return 0;
-}
-
-/**
- * ti_bandgap_write_counter() - set the bandgap sensor counter
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @interval: desired update interval in miliseconds
- */
-static void ti_bandgap_write_counter(struct ti_bandgap *bgp, int id,
- u32 interval)
-{
- interval = interval * bgp->clk_rate / 1000;
- spin_lock(&bgp->lock);
- RMW_BITS(bgp, id, bgap_counter, counter_mask, interval);
- spin_unlock(&bgp->lock);
-}
-
-/**
- * ti_bandgap_write_update_interval() - set the update interval
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @interval: desired update interval in miliseconds
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_write_update_interval(struct ti_bandgap *bgp,
- int id, u32 interval)
-{
- int ret = ti_bandgap_validate(bgp, id);
- if (ret)
- goto exit;
-
- if (!TI_BANDGAP_HAS(bgp, COUNTER) &&
- !TI_BANDGAP_HAS(bgp, COUNTER_DELAY)) {
- ret = -ENOTSUPP;
- goto exit;
- }
-
- if (TI_BANDGAP_HAS(bgp, COUNTER)) {
- ti_bandgap_write_counter(bgp, id, interval);
- goto exit;
- }
-
- ret = ti_bandgap_write_counter_delay(bgp, id, interval);
-exit:
- return ret;
-}
-
-/**
- * ti_bandgap_read_temperature() - report current temperature
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @temperature: resulting temperature
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id,
- int *temperature)
-{
- u32 temp;
- int ret;
-
- ret = ti_bandgap_validate(bgp, id);
- if (ret)
- return ret;
-
- spin_lock(&bgp->lock);
- temp = ti_bandgap_read_temp(bgp, id);
- spin_unlock(&bgp->lock);
-
- ret |= ti_bandgap_adc_to_mcelsius(bgp, temp, &temp);
- if (ret)
- return -EIO;
-
- *temperature = temp;
-
- return 0;
-}
-
-/**
- * ti_bandgap_set_sensor_data() - helper function to store thermal
- * framework related data.
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @data: thermal framework related data to be stored
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data)
-{
- int ret = ti_bandgap_validate(bgp, id);
- if (ret)
- return ret;
-
- bgp->regval[id].data = data;
-
- return 0;
-}
-
-/**
- * ti_bandgap_get_sensor_data() - helper function to get thermal
- * framework related data.
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- *
- * Return: data stored by set function with sensor id on success or NULL
- */
-void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id)
-{
- int ret = ti_bandgap_validate(bgp, id);
- if (ret)
- return ERR_PTR(ret);
-
- return bgp->regval[id].data;
-}
-
-/*** Helper functions used during device initialization ***/
-
-/**
- * ti_bandgap_force_single_read() - executes 1 single ADC conversion
- * @bgp: pointer to struct ti_bandgap
- * @id: sensor id which it is desired to read 1 temperature
- *
- * Used to initialize the conversion state machine and set it to a valid
- * state. Called during device initialization and context restore events.
- *
- * Return: 0
- */
-static int
-ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id)
-{
- u32 temp = 0, counter = 1000;
-
- /* Select single conversion mode */
- if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
- RMW_BITS(bgp, id, bgap_mode_ctrl, mode_ctrl_mask, 0);
-
- /* Start of Conversion = 1 */
- RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 1);
- /* Wait until DTEMP is updated */
- temp = ti_bandgap_read_temp(bgp, id);
-
- while ((temp == 0) && --counter)
- temp = ti_bandgap_read_temp(bgp, id);
- /* REVISIT: Check correct condition for end of conversion */
-
- /* Start of Conversion = 0 */
- RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 0);
-
- return 0;
-}
-
-/**
- * ti_bandgap_set_continous_mode() - One time enabling of continuous mode
- * @bgp: pointer to struct ti_bandgap
- *
- * Call this function only if HAS(MODE_CONFIG) is set. As this driver may
- * be used for junction temperature monitoring, it is desirable that the
- * sensors are operational all the time, so that alerts are generated
- * properly.
- *
- * Return: 0
- */
-static int ti_bandgap_set_continuous_mode(struct ti_bandgap *bgp)
-{
- int i;
-
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- /* Perform a single read just before enabling continuous */
- ti_bandgap_force_single_read(bgp, i);
- RMW_BITS(bgp, i, bgap_mode_ctrl, mode_ctrl_mask, 1);
- }
-
- return 0;
-}
-
-/**
- * ti_bandgap_get_trend() - To fetch the temperature trend of a sensor
- * @bgp: pointer to struct ti_bandgap
- * @id: id of the individual sensor
- * @trend: Pointer to trend.
- *
- * This function needs to be called to fetch the temperature trend of a
- * Particular sensor. The function computes the difference in temperature
- * w.r.t time. For the bandgaps with built in history buffer the temperatures
- * are read from the buffer and for those without the Buffer -ENOTSUPP is
- * returned.
- *
- * Return: 0 if no error, else return corresponding error. If no
- * error then the trend value is passed on to trend parameter
- */
-int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend)
-{
- struct temp_sensor_registers *tsr;
- u32 temp1, temp2, reg1, reg2;
- int t1, t2, interval, ret = 0;
-
- ret = ti_bandgap_validate(bgp, id);
- if (ret)
- goto exit;
-
- if (!TI_BANDGAP_HAS(bgp, HISTORY_BUFFER) ||
- !TI_BANDGAP_HAS(bgp, FREEZE_BIT)) {
- ret = -ENOTSUPP;
- goto exit;
- }
-
- tsr = bgp->conf->sensors[id].registers;
-
- /* Freeze and read the last 2 valid readings */
- reg1 = tsr->ctrl_dtemp_1;
- reg2 = tsr->ctrl_dtemp_2;
-
- /* read temperature from history buffer */
- temp1 = ti_bandgap_readl(bgp, reg1);
- temp1 &= tsr->bgap_dtemp_mask;
-
- temp2 = ti_bandgap_readl(bgp, reg2);
- temp2 &= tsr->bgap_dtemp_mask;
-
- /* Convert from adc values to mCelsius temperature */
- ret = ti_bandgap_adc_to_mcelsius(bgp, temp1, &t1);
- if (ret)
- goto exit;
-
- ret = ti_bandgap_adc_to_mcelsius(bgp, temp2, &t2);
- if (ret)
- goto exit;
-
- /* Fetch the update interval */
- ret = ti_bandgap_read_update_interval(bgp, id, &interval);
- if (ret || !interval)
- goto exit;
-
- *trend = (t1 - t2) / interval;
-
- dev_dbg(bgp->dev, "The temperatures are t1 = %d and t2 = %d and trend =%d\n",
- t1, t2, *trend);
-
-exit:
- return ret;
-}
-
-/**
- * ti_bandgap_tshut_init() - setup and initialize tshut handling
- * @bgp: pointer to struct ti_bandgap
- * @pdev: pointer to device struct platform_device
- *
- * Call this function only in case the bandgap features HAS(TSHUT).
- * In this case, the driver needs to handle the TSHUT signal as an IRQ.
- * The IRQ is wired as a GPIO, and for this purpose, it is required
- * to specify which GPIO line is used. TSHUT IRQ is fired anytime
- * one of the bandgap sensors violates the TSHUT high/hot threshold.
- * And in that case, the system must go off.
- *
- * Return: 0 if no error, else error status
- */
-static int ti_bandgap_tshut_init(struct ti_bandgap *bgp,
- struct platform_device *pdev)
-{
- int gpio_nr = bgp->tshut_gpio;
- int status;
-
- /* Request for gpio_86 line */
- status = gpio_request(gpio_nr, "tshut");
- if (status < 0) {
- dev_err(bgp->dev, "Could not request for TSHUT GPIO:%i\n", 86);
- return status;
- }
- status = gpio_direction_input(gpio_nr);
- if (status) {
- dev_err(bgp->dev, "Cannot set input TSHUT GPIO %d\n", gpio_nr);
- return status;
- }
-
- status = request_irq(gpio_to_irq(gpio_nr), ti_bandgap_tshut_irq_handler,
- IRQF_TRIGGER_RISING, "tshut", NULL);
- if (status) {
- gpio_free(gpio_nr);
- dev_err(bgp->dev, "request irq failed for TSHUT");
- }
-
- return 0;
-}
-
-/**
- * ti_bandgap_alert_init() - setup and initialize talert handling
- * @bgp: pointer to struct ti_bandgap
- * @pdev: pointer to device struct platform_device
- *
- * Call this function only in case the bandgap features HAS(TALERT).
- * In this case, the driver needs to handle the TALERT signals as an IRQs.
- * TALERT is a normal IRQ and it is fired any time thresholds (hot or cold)
- * are violated. In these situation, the driver must reprogram the thresholds,
- * accordingly to specified policy.
- *
- * Return: 0 if no error, else return corresponding error.
- */
-static int ti_bandgap_talert_init(struct ti_bandgap *bgp,
- struct platform_device *pdev)
-{
- int ret;
-
- bgp->irq = platform_get_irq(pdev, 0);
- if (bgp->irq < 0) {
- dev_err(&pdev->dev, "get_irq failed\n");
- return bgp->irq;
- }
- ret = request_threaded_irq(bgp->irq, NULL,
- ti_bandgap_talert_irq_handler,
- IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
- "talert", bgp);
- if (ret) {
- dev_err(&pdev->dev, "Request threaded irq failed.\n");
- return ret;
- }
-
- return 0;
-}
-
-static const struct of_device_id of_ti_bandgap_match[];
-/**
- * ti_bandgap_build() - parse DT and setup a struct ti_bandgap
- * @pdev: pointer to device struct platform_device
- *
- * Used to read the device tree properties accordingly to the bandgap
- * matching version. Based on bandgap version and its capabilities it
- * will build a struct ti_bandgap out of the required DT entries.
- *
- * Return: valid bandgap structure if successful, else returns ERR_PTR
- * return value must be verified with IS_ERR.
- */
-static struct ti_bandgap *ti_bandgap_build(struct platform_device *pdev)
-{
- struct device_node *node = pdev->dev.of_node;
- const struct of_device_id *of_id;
- struct ti_bandgap *bgp;
- struct resource *res;
- u32 prop;
- int i;
-
- /* just for the sake */
- if (!node) {
- dev_err(&pdev->dev, "no platform information available\n");
- return ERR_PTR(-EINVAL);
- }
-
- bgp = devm_kzalloc(&pdev->dev, sizeof(*bgp), GFP_KERNEL);
- if (!bgp) {
- dev_err(&pdev->dev, "Unable to allocate mem for driver ref\n");
- return ERR_PTR(-ENOMEM);
- }
-
- of_id = of_match_device(of_ti_bandgap_match, &pdev->dev);
- if (of_id)
- bgp->conf = of_id->data;
-
- /* register shadow for context save and restore */
- bgp->regval = devm_kzalloc(&pdev->dev, sizeof(*bgp->regval) *
- bgp->conf->sensor_count, GFP_KERNEL);
- if (!bgp) {
- dev_err(&pdev->dev, "Unable to allocate mem for driver ref\n");
- return ERR_PTR(-ENOMEM);
- }
-
- i = 0;
- do {
- void __iomem *chunk;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, i);
- if (!res)
- break;
- chunk = devm_ioremap_resource(&pdev->dev, res);
- if (i == 0)
- bgp->base = chunk;
- if (IS_ERR(chunk))
- return ERR_CAST(chunk);
-
- i++;
- } while (res);
-
- if (TI_BANDGAP_HAS(bgp, TSHUT)) {
- if (of_property_read_u32(node, "ti,tshut-gpio", &prop) < 0) {
- dev_err(&pdev->dev, "missing tshut gpio in device tree\n");
- return ERR_PTR(-EINVAL);
- }
- bgp->tshut_gpio = prop;
- if (!gpio_is_valid(bgp->tshut_gpio)) {
- dev_err(&pdev->dev, "invalid gpio for tshut (%d)\n",
- bgp->tshut_gpio);
- return ERR_PTR(-EINVAL);
- }
- }
-
- return bgp;
-}
-
-/*** Device driver call backs ***/
-
-static
-int ti_bandgap_probe(struct platform_device *pdev)
-{
- struct ti_bandgap *bgp;
- int clk_rate, ret = 0, i;
-
- bgp = ti_bandgap_build(pdev);
- if (IS_ERR_OR_NULL(bgp)) {
- dev_err(&pdev->dev, "failed to fetch platform data\n");
- return PTR_ERR(bgp);
- }
- bgp->dev = &pdev->dev;
-
- if (TI_BANDGAP_HAS(bgp, TSHUT)) {
- ret = ti_bandgap_tshut_init(bgp, pdev);
- if (ret) {
- dev_err(&pdev->dev,
- "failed to initialize system tshut IRQ\n");
- return ret;
- }
- }
-
- bgp->fclock = clk_get(NULL, bgp->conf->fclock_name);
- ret = IS_ERR_OR_NULL(bgp->fclock);
- if (ret) {
- dev_err(&pdev->dev, "failed to request fclock reference\n");
- goto free_irqs;
- }
-
- bgp->div_clk = clk_get(NULL, bgp->conf->div_ck_name);
- ret = IS_ERR_OR_NULL(bgp->div_clk);
- if (ret) {
- dev_err(&pdev->dev,
- "failed to request div_ts_ck clock ref\n");
- goto free_irqs;
- }
-
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- struct temp_sensor_registers *tsr;
- u32 val;
-
- tsr = bgp->conf->sensors[i].registers;
- /*
- * check if the efuse has a non-zero value if not
- * it is an untrimmed sample and the temperatures
- * may not be accurate
- */
- val = ti_bandgap_readl(bgp, tsr->bgap_efuse);
- if (ret || !val)
- dev_info(&pdev->dev,
- "Non-trimmed BGAP, Temp not accurate\n");
- }
-
- clk_rate = clk_round_rate(bgp->div_clk,
- bgp->conf->sensors[0].ts_data->max_freq);
- if (clk_rate < bgp->conf->sensors[0].ts_data->min_freq ||
- clk_rate == 0xffffffff) {
- ret = -ENODEV;
- dev_err(&pdev->dev, "wrong clock rate (%d)\n", clk_rate);
- goto put_clks;
- }
-
- ret = clk_set_rate(bgp->div_clk, clk_rate);
- if (ret)
- dev_err(&pdev->dev, "Cannot re-set clock rate. Continuing\n");
-
- bgp->clk_rate = clk_rate;
- if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
- clk_prepare_enable(bgp->fclock);
-
-
- spin_lock_init(&bgp->lock);
- bgp->dev = &pdev->dev;
- platform_set_drvdata(pdev, bgp);
-
- ti_bandgap_power(bgp, true);
-
- /* Set default counter to 1 for now */
- if (TI_BANDGAP_HAS(bgp, COUNTER))
- for (i = 0; i < bgp->conf->sensor_count; i++)
- RMW_BITS(bgp, i, bgap_counter, counter_mask, 1);
-
- /* Set default thresholds for alert and shutdown */
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- struct temp_sensor_data *ts_data;
-
- ts_data = bgp->conf->sensors[i].ts_data;
-
- if (TI_BANDGAP_HAS(bgp, TALERT)) {
- /* Set initial Talert thresholds */
- RMW_BITS(bgp, i, bgap_threshold,
- threshold_tcold_mask, ts_data->t_cold);
- RMW_BITS(bgp, i, bgap_threshold,
- threshold_thot_mask, ts_data->t_hot);
- /* Enable the alert events */
- RMW_BITS(bgp, i, bgap_mask_ctrl, mask_hot_mask, 1);
- RMW_BITS(bgp, i, bgap_mask_ctrl, mask_cold_mask, 1);
- }
-
- if (TI_BANDGAP_HAS(bgp, TSHUT_CONFIG)) {
- /* Set initial Tshut thresholds */
- RMW_BITS(bgp, i, tshut_threshold,
- tshut_hot_mask, ts_data->tshut_hot);
- RMW_BITS(bgp, i, tshut_threshold,
- tshut_cold_mask, ts_data->tshut_cold);
- }
- }
-
- if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
- ti_bandgap_set_continuous_mode(bgp);
-
- /* Set .250 seconds time as default counter */
- if (TI_BANDGAP_HAS(bgp, COUNTER))
- for (i = 0; i < bgp->conf->sensor_count; i++)
- RMW_BITS(bgp, i, bgap_counter, counter_mask,
- bgp->clk_rate / 4);
-
- /* Every thing is good? Then expose the sensors */
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- char *domain;
-
- if (bgp->conf->sensors[i].register_cooling) {
- ret = bgp->conf->sensors[i].register_cooling(bgp, i);
- if (ret)
- goto remove_sensors;
- }
-
- if (bgp->conf->expose_sensor) {
- domain = bgp->conf->sensors[i].domain;
- ret = bgp->conf->expose_sensor(bgp, i, domain);
- if (ret)
- goto remove_last_cooling;
- }
- }
-
- /*
- * Enable the Interrupts once everything is set. Otherwise irq handler
- * might be called as soon as it is enabled where as rest of framework
- * is still getting initialised.
- */
- if (TI_BANDGAP_HAS(bgp, TALERT)) {
- ret = ti_bandgap_talert_init(bgp, pdev);
- if (ret) {
- dev_err(&pdev->dev, "failed to initialize Talert IRQ\n");
- i = bgp->conf->sensor_count;
- goto disable_clk;
- }
- }
-
- return 0;
-
-remove_last_cooling:
- if (bgp->conf->sensors[i].unregister_cooling)
- bgp->conf->sensors[i].unregister_cooling(bgp, i);
-remove_sensors:
- for (i--; i >= 0; i--) {
- if (bgp->conf->sensors[i].unregister_cooling)
- bgp->conf->sensors[i].unregister_cooling(bgp, i);
- if (bgp->conf->remove_sensor)
- bgp->conf->remove_sensor(bgp, i);
- }
- ti_bandgap_power(bgp, false);
-disable_clk:
- if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
- clk_disable_unprepare(bgp->fclock);
-put_clks:
- clk_put(bgp->fclock);
- clk_put(bgp->div_clk);
-free_irqs:
- if (TI_BANDGAP_HAS(bgp, TSHUT)) {
- free_irq(gpio_to_irq(bgp->tshut_gpio), NULL);
- gpio_free(bgp->tshut_gpio);
- }
-
- return ret;
-}
-
-static
-int ti_bandgap_remove(struct platform_device *pdev)
-{
- struct ti_bandgap *bgp = platform_get_drvdata(pdev);
- int i;
-
- /* First thing is to remove sensor interfaces */
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- if (bgp->conf->sensors[i].unregister_cooling)
- bgp->conf->sensors[i].unregister_cooling(bgp, i);
-
- if (bgp->conf->remove_sensor)
- bgp->conf->remove_sensor(bgp, i);
- }
-
- ti_bandgap_power(bgp, false);
-
- if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
- clk_disable_unprepare(bgp->fclock);
- clk_put(bgp->fclock);
- clk_put(bgp->div_clk);
-
- if (TI_BANDGAP_HAS(bgp, TALERT))
- free_irq(bgp->irq, bgp);
-
- if (TI_BANDGAP_HAS(bgp, TSHUT)) {
- free_irq(gpio_to_irq(bgp->tshut_gpio), NULL);
- gpio_free(bgp->tshut_gpio);
- }
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int ti_bandgap_save_ctxt(struct ti_bandgap *bgp)
-{
- int i;
-
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- struct temp_sensor_registers *tsr;
- struct temp_sensor_regval *rval;
-
- rval = &bgp->regval[i];
- tsr = bgp->conf->sensors[i].registers;
-
- if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
- rval->bg_mode_ctrl = ti_bandgap_readl(bgp,
- tsr->bgap_mode_ctrl);
- if (TI_BANDGAP_HAS(bgp, COUNTER))
- rval->bg_counter = ti_bandgap_readl(bgp,
- tsr->bgap_counter);
- if (TI_BANDGAP_HAS(bgp, TALERT)) {
- rval->bg_threshold = ti_bandgap_readl(bgp,
- tsr->bgap_threshold);
- rval->bg_ctrl = ti_bandgap_readl(bgp,
- tsr->bgap_mask_ctrl);
- }
-
- if (TI_BANDGAP_HAS(bgp, TSHUT_CONFIG))
- rval->tshut_threshold = ti_bandgap_readl(bgp,
- tsr->tshut_threshold);
- }
-
- return 0;
-}
-
-static int ti_bandgap_restore_ctxt(struct ti_bandgap *bgp)
-{
- int i;
-
- for (i = 0; i < bgp->conf->sensor_count; i++) {
- struct temp_sensor_registers *tsr;
- struct temp_sensor_regval *rval;
- u32 val = 0;
-
- rval = &bgp->regval[i];
- tsr = bgp->conf->sensors[i].registers;
-
- if (TI_BANDGAP_HAS(bgp, COUNTER))
- val = ti_bandgap_readl(bgp, tsr->bgap_counter);
-
- if (TI_BANDGAP_HAS(bgp, TSHUT_CONFIG))
- ti_bandgap_writel(bgp, rval->tshut_threshold,
- tsr->tshut_threshold);
- /* Force immediate temperature measurement and update
- * of the DTEMP field
- */
- ti_bandgap_force_single_read(bgp, i);
-
- if (TI_BANDGAP_HAS(bgp, COUNTER))
- ti_bandgap_writel(bgp, rval->bg_counter,
- tsr->bgap_counter);
- if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
- ti_bandgap_writel(bgp, rval->bg_mode_ctrl,
- tsr->bgap_mode_ctrl);
- if (TI_BANDGAP_HAS(bgp, TALERT)) {
- ti_bandgap_writel(bgp, rval->bg_threshold,
- tsr->bgap_threshold);
- ti_bandgap_writel(bgp, rval->bg_ctrl,
- tsr->bgap_mask_ctrl);
- }
- }
-
- return 0;
-}
-
-static int ti_bandgap_suspend(struct device *dev)
-{
- struct ti_bandgap *bgp = dev_get_drvdata(dev);
- int err;
-
- err = ti_bandgap_save_ctxt(bgp);
- ti_bandgap_power(bgp, false);
-
- if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
- clk_disable_unprepare(bgp->fclock);
-
- return err;
-}
-
-static int ti_bandgap_resume(struct device *dev)
-{
- struct ti_bandgap *bgp = dev_get_drvdata(dev);
-
- if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
- clk_prepare_enable(bgp->fclock);
-
- ti_bandgap_power(bgp, true);
-
- return ti_bandgap_restore_ctxt(bgp);
-}
-static const struct dev_pm_ops ti_bandgap_dev_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(ti_bandgap_suspend,
- ti_bandgap_resume)
-};
-
-#define DEV_PM_OPS (&ti_bandgap_dev_pm_ops)
-#else
-#define DEV_PM_OPS NULL
-#endif
-
-static const struct of_device_id of_ti_bandgap_match[] = {
-#ifdef CONFIG_OMAP4_THERMAL
- {
- .compatible = "ti,omap4430-bandgap",
- .data = (void *)&omap4430_data,
- },
- {
- .compatible = "ti,omap4460-bandgap",
- .data = (void *)&omap4460_data,
- },
- {
- .compatible = "ti,omap4470-bandgap",
- .data = (void *)&omap4470_data,
- },
-#endif
-#ifdef CONFIG_OMAP5_THERMAL
- {
- .compatible = "ti,omap5430-bandgap",
- .data = (void *)&omap5430_data,
- },
-#endif
- /* Sentinel */
- { },
-};
-MODULE_DEVICE_TABLE(of, of_ti_bandgap_match);
-
-static struct platform_driver ti_bandgap_sensor_driver = {
- .probe = ti_bandgap_probe,
- .remove = ti_bandgap_remove,
- .driver = {
- .name = "ti-soc-thermal",
- .pm = DEV_PM_OPS,
- .of_match_table = of_ti_bandgap_match,
- },
-};
-
-module_platform_driver(ti_bandgap_sensor_driver);
-
-MODULE_DESCRIPTION("OMAP4+ bandgap temperature sensor driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:ti-soc-thermal");
-MODULE_AUTHOR("Texas Instrument Inc.");
+++ /dev/null
-/*
- * OMAP4 Bandgap temperature sensor driver
- *
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
- * Contact:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-#ifndef __TI_BANDGAP_H
-#define __TI_BANDGAP_H
-
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/err.h>
-
-/**
- * DOC: bandgap driver data structure
- * ==================================
- *
- * +----------+----------------+
- * | struct temp_sensor_regval |
- * +---------------------------+
- * * (Array of)
- * |
- * |
- * +-------------------+ +-----------------+
- * | struct ti_bandgap |-->| struct device * |
- * +----------+--------+ +-----------------+
- * |
- * |
- * V
- * +------------------------+
- * | struct ti_bandgap_data |
- * +------------------------+
- * |
- * |
- * * (Array of)
- * +------------+------------------------------------------------------+
- * | +----------+------------+ +-------------------------+ |
- * | | struct ti_temp_sensor |-->| struct temp_sensor_data | |
- * | +-----------------------+ +------------+------------+ |
- * | | |
- * | + |
- * | V |
- * | +----------+-------------------+ |
- * | | struct temp_sensor_registers | |
- * | +------------------------------+ |
- * | |
- * +-------------------------------------------------------------------+
- *
- * Above is a simple diagram describing how the data structure below
- * are organized. For each bandgap device there should be a ti_bandgap_data
- * containing the device instance configuration, as well as, an array of
- * sensors, representing every sensor instance present in this bandgap.
- */
-
-/**
- * struct temp_sensor_registers - descriptor to access registers and bitfields
- * @temp_sensor_ctrl: TEMP_SENSOR_CTRL register offset
- * @bgap_tempsoff_mask: mask to temp_sensor_ctrl.tempsoff
- * @bgap_soc_mask: mask to temp_sensor_ctrl.soc
- * @bgap_eocz_mask: mask to temp_sensor_ctrl.eocz
- * @bgap_dtemp_mask: mask to temp_sensor_ctrl.dtemp
- * @bgap_mask_ctrl: BANDGAP_MASK_CTRL register offset
- * @mask_hot_mask: mask to bandgap_mask_ctrl.mask_hot
- * @mask_cold_mask: mask to bandgap_mask_ctrl.mask_cold
- * @mask_sidlemode_mask: mask to bandgap_mask_ctrl.mask_sidlemode
- * @mask_counter_delay_mask: mask to bandgap_mask_ctrl.mask_counter_delay
- * @mask_freeze_mask: mask to bandgap_mask_ctrl.mask_free
- * @mask_clear_mask: mask to bandgap_mask_ctrl.mask_clear
- * @mask_clear_accum_mask: mask to bandgap_mask_ctrl.mask_clear_accum
- * @bgap_mode_ctrl: BANDGAP_MODE_CTRL register offset
- * @mode_ctrl_mask: mask to bandgap_mode_ctrl.mode_ctrl
- * @bgap_counter: BANDGAP_COUNTER register offset
- * @counter_mask: mask to bandgap_counter.counter
- * @bgap_threshold: BANDGAP_THRESHOLD register offset (TALERT thresholds)
- * @threshold_thot_mask: mask to bandgap_threhold.thot
- * @threshold_tcold_mask: mask to bandgap_threhold.tcold
- * @tshut_threshold: TSHUT_THRESHOLD register offset (TSHUT thresholds)
- * @tshut_efuse_mask: mask to tshut_threshold.tshut_efuse
- * @tshut_efuse_shift: shift to tshut_threshold.tshut_efuse
- * @tshut_hot_mask: mask to tshut_threhold.thot
- * @tshut_cold_mask: mask to tshut_threhold.thot
- * @bgap_status: BANDGAP_STATUS register offset
- * @status_clean_stop_mask: mask to bandgap_status.clean_stop
- * @status_bgap_alert_mask: mask to bandgap_status.bandgap_alert
- * @status_hot_mask: mask to bandgap_status.hot
- * @status_cold_mask: mask to bandgap_status.cold
- * @bgap_cumul_dtemp: BANDGAP_CUMUL_DTEMP register offset
- * @ctrl_dtemp_0: CTRL_DTEMP0 register offset
- * @ctrl_dtemp_1: CTRL_DTEMP1 register offset
- * @ctrl_dtemp_2: CTRL_DTEMP2 register offset
- * @ctrl_dtemp_3: CTRL_DTEMP3 register offset
- * @ctrl_dtemp_4: CTRL_DTEMP4 register offset
- * @bgap_efuse: BANDGAP_EFUSE register offset
- *
- * The register offsets and bitfields might change across
- * OMAP and variants versions. Hence this struct serves as a
- * descriptor map on how to access the registers and the bitfields.
- *
- * This descriptor contains registers of all versions of bandgap chips.
- * Not all versions will use all registers, depending on the available
- * features. Please read TRMs for descriptive explanation on each bitfield.
- */
-
-struct temp_sensor_registers {
- u32 temp_sensor_ctrl;
- u32 bgap_tempsoff_mask;
- u32 bgap_soc_mask;
- u32 bgap_eocz_mask; /* not used: but needs revisit */
- u32 bgap_dtemp_mask;
-
- u32 bgap_mask_ctrl;
- u32 mask_hot_mask;
- u32 mask_cold_mask;
- u32 mask_sidlemode_mask; /* not used: but may be needed for pm */
- u32 mask_counter_delay_mask;
- u32 mask_freeze_mask;
- u32 mask_clear_mask; /* not used: but needed for trending */
- u32 mask_clear_accum_mask; /* not used: but needed for trending */
-
- u32 bgap_mode_ctrl;
- u32 mode_ctrl_mask;
-
- u32 bgap_counter;
- u32 counter_mask;
-
- u32 bgap_threshold;
- u32 threshold_thot_mask;
- u32 threshold_tcold_mask;
-
- u32 tshut_threshold;
- u32 tshut_efuse_mask; /* not used */
- u32 tshut_efuse_shift; /* not used */
- u32 tshut_hot_mask;
- u32 tshut_cold_mask;
-
- u32 bgap_status;
- u32 status_clean_stop_mask; /* not used: but needed for trending */
- u32 status_bgap_alert_mask; /* not used */
- u32 status_hot_mask;
- u32 status_cold_mask;
-
- u32 bgap_cumul_dtemp; /* not used: but needed for trending */
- u32 ctrl_dtemp_0; /* not used: but needed for trending */
- u32 ctrl_dtemp_1; /* not used: but needed for trending */
- u32 ctrl_dtemp_2; /* not used: but needed for trending */
- u32 ctrl_dtemp_3; /* not used: but needed for trending */
- u32 ctrl_dtemp_4; /* not used: but needed for trending */
- u32 bgap_efuse;
-};
-
-/**
- * struct temp_sensor_data - The thresholds and limits for temperature sensors.
- * @tshut_hot: temperature to trigger a thermal reset (initial value)
- * @tshut_cold: temp to get the plat out of reset due to thermal (init val)
- * @t_hot: temperature to trigger a thermal alert (high initial value)
- * @t_cold: temperature to trigger a thermal alert (low initial value)
- * @min_freq: sensor minimum clock rate
- * @max_freq: sensor maximum clock rate
- * @max_temp: sensor maximum temperature
- * @min_temp: sensor minimum temperature
- * @hyst_val: temperature hysteresis considered while converting ADC values
- * @update_int1: update interval
- * @update_int2: update interval
- *
- * This data structure will hold the required thresholds and temperature limits
- * for a specific temperature sensor, like shutdown temperature, alert
- * temperature, clock / rate used, ADC conversion limits and update intervals
- */
-struct temp_sensor_data {
- u32 tshut_hot;
- u32 tshut_cold;
- u32 t_hot;
- u32 t_cold;
- u32 min_freq;
- u32 max_freq;
- int max_temp;
- int min_temp;
- int hyst_val;
- u32 update_int1; /* not used */
- u32 update_int2; /* not used */
-};
-
-struct ti_bandgap_data;
-
-/**
- * struct temp_sensor_regval - temperature sensor register values and priv data
- * @bg_mode_ctrl: temp sensor control register value
- * @bg_ctrl: bandgap ctrl register value
- * @bg_counter: bandgap counter value
- * @bg_threshold: bandgap threshold register value
- * @tshut_threshold: bandgap tshut register value
- * @data: private data
- *
- * Data structure to save and restore bandgap register set context. Only
- * required registers are shadowed, when needed.
- */
-struct temp_sensor_regval {
- u32 bg_mode_ctrl;
- u32 bg_ctrl;
- u32 bg_counter;
- u32 bg_threshold;
- u32 tshut_threshold;
- void *data;
-};
-
-/**
- * struct ti_bandgap - bandgap device structure
- * @dev: struct device pointer
- * @base: io memory base address
- * @conf: struct with bandgap configuration set (# sensors, conv_table, etc)
- * @regval: temperature sensor register values
- * @fclock: pointer to functional clock of temperature sensor
- * @div_clk: pointer to divider clock of temperature sensor fclk
- * @lock: spinlock for ti_bandgap structure
- * @irq: MPU IRQ number for thermal alert
- * @tshut_gpio: GPIO where Tshut signal is routed
- * @clk_rate: Holds current clock rate
- *
- * The bandgap device structure representing the bandgap device instance.
- * It holds most of the dynamic stuff. Configurations and sensor specific
- * entries are inside the @conf structure.
- */
-struct ti_bandgap {
- struct device *dev;
- void __iomem *base;
- const struct ti_bandgap_data *conf;
- struct temp_sensor_regval *regval;
- struct clk *fclock;
- struct clk *div_clk;
- spinlock_t lock; /* shields this struct */
- int irq;
- int tshut_gpio;
- u32 clk_rate;
-};
-
-/**
- * struct ti_temp_sensor - bandgap temperature sensor configuration data
- * @ts_data: pointer to struct with thresholds, limits of temperature sensor
- * @registers: pointer to the list of register offsets and bitfields
- * @domain: the name of the domain where the sensor is located
- * @slope: sensor gradient slope info for hotspot extrapolation equation
- * @constant: sensor gradient const info for hotspot extrapolation equation
- * @slope_pcb: sensor gradient slope info for hotspot extrapolation equation
- * with no external influence
- * @constant_pcb: sensor gradient const info for hotspot extrapolation equation
- * with no external influence
- * @register_cooling: function to describe how this sensor is going to be cooled
- * @unregister_cooling: function to release cooling data
- *
- * Data structure to describe a temperature sensor handled by a bandgap device.
- * It should provide configuration details on this sensor, such as how to
- * access the registers affecting this sensor, shadow register buffer, how to
- * assess the gradient from hotspot, how to cooldown the domain when sensor
- * reports too hot temperature.
- */
-struct ti_temp_sensor {
- struct temp_sensor_data *ts_data;
- struct temp_sensor_registers *registers;
- char *domain;
- /* for hotspot extrapolation */
- const int slope;
- const int constant;
- const int slope_pcb;
- const int constant_pcb;
- int (*register_cooling)(struct ti_bandgap *bgp, int id);
- int (*unregister_cooling)(struct ti_bandgap *bgp, int id);
-};
-
-/**
- * DOC: ti bandgap feature types
- *
- * TI_BANDGAP_FEATURE_TSHUT - used when the thermal shutdown signal output
- * of a bandgap device instance is routed to the processor. This means
- * the system must react and perform the shutdown by itself (handle an
- * IRQ, for instance).
- *
- * TI_BANDGAP_FEATURE_TSHUT_CONFIG - used when the bandgap device has control
- * over the thermal shutdown configuration. This means that the thermal
- * shutdown thresholds are programmable, for instance.
- *
- * TI_BANDGAP_FEATURE_TALERT - used when the bandgap device instance outputs
- * a signal representing violation of programmable alert thresholds.
- *
- * TI_BANDGAP_FEATURE_MODE_CONFIG - used when it is possible to choose which
- * mode, continuous or one shot, the bandgap device instance will operate.
- *
- * TI_BANDGAP_FEATURE_COUNTER - used when the bandgap device instance allows
- * programming the update interval of its internal state machine.
- *
- * TI_BANDGAP_FEATURE_POWER_SWITCH - used when the bandgap device allows
- * itself to be switched on/off.
- *
- * TI_BANDGAP_FEATURE_CLK_CTRL - used when the clocks feeding the bandgap
- * device are gateable or not.
- *
- * TI_BANDGAP_FEATURE_FREEZE_BIT - used when the bandgap device features
- * a history buffer that its update can be freezed/unfreezed.
- *
- * TI_BANDGAP_FEATURE_COUNTER_DELAY - used when the bandgap device features
- * a delay programming based on distinct values.
- *
- * TI_BANDGAP_FEATURE_HISTORY_BUFFER - used when the bandgap device features
- * a history buffer of temperatures.
- *
- * TI_BANDGAP_HAS(b, f) - macro to check if a bandgap device is capable of a
- * specific feature (above) or not. Return non-zero, if yes.
- */
-#define TI_BANDGAP_FEATURE_TSHUT BIT(0)
-#define TI_BANDGAP_FEATURE_TSHUT_CONFIG BIT(1)
-#define TI_BANDGAP_FEATURE_TALERT BIT(2)
-#define TI_BANDGAP_FEATURE_MODE_CONFIG BIT(3)
-#define TI_BANDGAP_FEATURE_COUNTER BIT(4)
-#define TI_BANDGAP_FEATURE_POWER_SWITCH BIT(5)
-#define TI_BANDGAP_FEATURE_CLK_CTRL BIT(6)
-#define TI_BANDGAP_FEATURE_FREEZE_BIT BIT(7)
-#define TI_BANDGAP_FEATURE_COUNTER_DELAY BIT(8)
-#define TI_BANDGAP_FEATURE_HISTORY_BUFFER BIT(9)
-#define TI_BANDGAP_HAS(b, f) \
- ((b)->conf->features & TI_BANDGAP_FEATURE_ ## f)
-
-/**
- * struct ti_bandgap_data - ti bandgap data configuration structure
- * @features: a bitwise flag set to describe the device features
- * @conv_table: Pointer to ADC to temperature conversion table
- * @adc_start_val: ADC conversion table starting value
- * @adc_end_val: ADC conversion table ending value
- * @fclock_name: clock name of the functional clock
- * @div_ck_name: clock name of the clock divisor
- * @sensor_count: count of temperature sensor within this bandgap device
- * @report_temperature: callback to report thermal alert to thermal API
- * @expose_sensor: callback to export sensor to thermal API
- * @remove_sensor: callback to destroy sensor from thermal API
- * @sensors: array of sensors present in this bandgap instance
- *
- * This is a data structure which should hold most of the static configuration
- * of a bandgap device instance. It should describe which features this instance
- * is capable of, the clock names to feed this device, the amount of sensors and
- * their configuration representation, and how to export and unexport them to
- * a thermal API.
- */
-struct ti_bandgap_data {
- unsigned int features;
- const int *conv_table;
- u32 adc_start_val;
- u32 adc_end_val;
- char *fclock_name;
- char *div_ck_name;
- int sensor_count;
- int (*report_temperature)(struct ti_bandgap *bgp, int id);
- int (*expose_sensor)(struct ti_bandgap *bgp, int id, char *domain);
- int (*remove_sensor)(struct ti_bandgap *bgp, int id);
-
- /* this needs to be at the end */
- struct ti_temp_sensor sensors[];
-};
-
-int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot);
-int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val);
-int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold);
-int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val);
-int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id,
- int *interval);
-int ti_bandgap_write_update_interval(struct ti_bandgap *bgp, int id,
- u32 interval);
-int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id,
- int *temperature);
-int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data);
-void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id);
-int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend);
-
-#ifdef CONFIG_OMAP4_THERMAL
-extern const struct ti_bandgap_data omap4430_data;
-extern const struct ti_bandgap_data omap4460_data;
-extern const struct ti_bandgap_data omap4470_data;
-#else
-#define omap4430_data NULL
-#define omap4460_data NULL
-#define omap4470_data NULL
-#endif
-
-#ifdef CONFIG_OMAP5_THERMAL
-extern const struct ti_bandgap_data omap5430_data;
-#else
-#define omap5430_data NULL
-#endif
-
-#endif
+++ /dev/null
-/*
- * OMAP thermal driver interface
- *
- * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
- * Contact:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/mutex.h>
-#include <linux/gfp.h>
-#include <linux/kernel.h>
-#include <linux/workqueue.h>
-#include <linux/thermal.h>
-#include <linux/cpufreq.h>
-#include <linux/cpumask.h>
-#include <linux/cpu_cooling.h>
-
-#include "ti-thermal.h"
-#include "ti-bandgap.h"
-
-/* common data structures */
-struct ti_thermal_data {
- struct thermal_zone_device *ti_thermal;
- struct thermal_cooling_device *cool_dev;
- struct ti_bandgap *bgp;
- enum thermal_device_mode mode;
- struct work_struct thermal_wq;
- int sensor_id;
-};
-
-static void ti_thermal_work(struct work_struct *work)
-{
- struct ti_thermal_data *data = container_of(work,
- struct ti_thermal_data, thermal_wq);
-
- thermal_zone_device_update(data->ti_thermal);
-
- dev_dbg(&data->ti_thermal->device, "updated thermal zone %s\n",
- data->ti_thermal->type);
-}
-
-/**
- * ti_thermal_hotspot_temperature - returns sensor extrapolated temperature
- * @t: omap sensor temperature
- * @s: omap sensor slope value
- * @c: omap sensor const value
- */
-static inline int ti_thermal_hotspot_temperature(int t, int s, int c)
-{
- int delta = t * s / 1000 + c;
-
- if (delta < 0)
- delta = 0;
-
- return t + delta;
-}
-
-/* thermal zone ops */
-/* Get temperature callback function for thermal zone*/
-static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
- unsigned long *temp)
-{
- struct ti_thermal_data *data = thermal->devdata;
- struct ti_bandgap *bgp;
- const struct ti_temp_sensor *s;
- int ret, tmp, pcb_temp, slope, constant;
-
- if (!data)
- return 0;
-
- bgp = data->bgp;
- s = &bgp->conf->sensors[data->sensor_id];
-
- ret = ti_bandgap_read_temperature(bgp, data->sensor_id, &tmp);
- if (ret)
- return ret;
-
- pcb_temp = 0;
- /* TODO: Introduce pcb temperature lookup */
- /* In case pcb zone is available, use the extrapolation rule with it */
- if (pcb_temp) {
- tmp -= pcb_temp;
- slope = s->slope_pcb;
- constant = s->constant_pcb;
- } else {
- slope = s->slope;
- constant = s->constant;
- }
- *temp = ti_thermal_hotspot_temperature(tmp, slope, constant);
-
- return ret;
-}
-
-/* Bind callback functions for thermal zone */
-static int ti_thermal_bind(struct thermal_zone_device *thermal,
- struct thermal_cooling_device *cdev)
-{
- struct ti_thermal_data *data = thermal->devdata;
- int id;
-
- if (IS_ERR_OR_NULL(data))
- return -ENODEV;
-
- /* check if this is the cooling device we registered */
- if (data->cool_dev != cdev)
- return 0;
-
- id = data->sensor_id;
-
- /* Simple thing, two trips, one passive another critical */
- return thermal_zone_bind_cooling_device(thermal, 0, cdev,
- /* bind with min and max states defined by cpu_cooling */
- THERMAL_NO_LIMIT,
- THERMAL_NO_LIMIT);
-}
-
-/* Unbind callback functions for thermal zone */
-static int ti_thermal_unbind(struct thermal_zone_device *thermal,
- struct thermal_cooling_device *cdev)
-{
- struct ti_thermal_data *data = thermal->devdata;
-
- if (IS_ERR_OR_NULL(data))
- return -ENODEV;
-
- /* check if this is the cooling device we registered */
- if (data->cool_dev != cdev)
- return 0;
-
- /* Simple thing, two trips, one passive another critical */
- return thermal_zone_unbind_cooling_device(thermal, 0, cdev);
-}
-
-/* Get mode callback functions for thermal zone */
-static int ti_thermal_get_mode(struct thermal_zone_device *thermal,
- enum thermal_device_mode *mode)
-{
- struct ti_thermal_data *data = thermal->devdata;
-
- if (data)
- *mode = data->mode;
-
- return 0;
-}
-
-/* Set mode callback functions for thermal zone */
-static int ti_thermal_set_mode(struct thermal_zone_device *thermal,
- enum thermal_device_mode mode)
-{
- struct ti_thermal_data *data = thermal->devdata;
-
- if (!data->ti_thermal) {
- dev_notice(&thermal->device, "thermal zone not registered\n");
- return 0;
- }
-
- mutex_lock(&data->ti_thermal->lock);
-
- if (mode == THERMAL_DEVICE_ENABLED)
- data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
- else
- data->ti_thermal->polling_delay = 0;
-
- mutex_unlock(&data->ti_thermal->lock);
-
- data->mode = mode;
- thermal_zone_device_update(data->ti_thermal);
- dev_dbg(&thermal->device, "thermal polling set for duration=%d msec\n",
- data->ti_thermal->polling_delay);
-
- return 0;
-}
-
-/* Get trip type callback functions for thermal zone */
-static int ti_thermal_get_trip_type(struct thermal_zone_device *thermal,
- int trip, enum thermal_trip_type *type)
-{
- if (!ti_thermal_is_valid_trip(trip))
- return -EINVAL;
-
- if (trip + 1 == OMAP_TRIP_NUMBER)
- *type = THERMAL_TRIP_CRITICAL;
- else
- *type = THERMAL_TRIP_PASSIVE;
-
- return 0;
-}
-
-/* Get trip temperature callback functions for thermal zone */
-static int ti_thermal_get_trip_temp(struct thermal_zone_device *thermal,
- int trip, unsigned long *temp)
-{
- if (!ti_thermal_is_valid_trip(trip))
- return -EINVAL;
-
- *temp = ti_thermal_get_trip_value(trip);
-
- return 0;
-}
-
-/* Get the temperature trend callback functions for thermal zone */
-static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
- int trip, enum thermal_trend *trend)
-{
- struct ti_thermal_data *data = thermal->devdata;
- struct ti_bandgap *bgp;
- int id, tr, ret = 0;
-
- bgp = data->bgp;
- id = data->sensor_id;
-
- ret = ti_bandgap_get_trend(bgp, id, &tr);
- if (ret)
- return ret;
-
- if (tr > 0)
- *trend = THERMAL_TREND_RAISING;
- else if (tr < 0)
- *trend = THERMAL_TREND_DROPPING;
- else
- *trend = THERMAL_TREND_STABLE;
-
- return 0;
-}
-
-/* Get critical temperature callback functions for thermal zone */
-static int ti_thermal_get_crit_temp(struct thermal_zone_device *thermal,
- unsigned long *temp)
-{
- /* shutdown zone */
- return ti_thermal_get_trip_temp(thermal, OMAP_TRIP_NUMBER - 1, temp);
-}
-
-static struct thermal_zone_device_ops ti_thermal_ops = {
- .get_temp = ti_thermal_get_temp,
- .get_trend = ti_thermal_get_trend,
- .bind = ti_thermal_bind,
- .unbind = ti_thermal_unbind,
- .get_mode = ti_thermal_get_mode,
- .set_mode = ti_thermal_set_mode,
- .get_trip_type = ti_thermal_get_trip_type,
- .get_trip_temp = ti_thermal_get_trip_temp,
- .get_crit_temp = ti_thermal_get_crit_temp,
-};
-
-static struct ti_thermal_data
-*ti_thermal_build_data(struct ti_bandgap *bgp, int id)
-{
- struct ti_thermal_data *data;
-
- data = devm_kzalloc(bgp->dev, sizeof(*data), GFP_KERNEL);
- if (!data) {
- dev_err(bgp->dev, "kzalloc fail\n");
- return NULL;
- }
- data->sensor_id = id;
- data->bgp = bgp;
- data->mode = THERMAL_DEVICE_ENABLED;
- INIT_WORK(&data->thermal_wq, ti_thermal_work);
-
- return data;
-}
-
-int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
- char *domain)
-{
- struct ti_thermal_data *data;
-
- data = ti_bandgap_get_sensor_data(bgp, id);
-
- if (IS_ERR_OR_NULL(data))
- data = ti_thermal_build_data(bgp, id);
-
- if (!data)
- return -EINVAL;
-
- /* Create thermal zone */
- data->ti_thermal = thermal_zone_device_register(domain,
- OMAP_TRIP_NUMBER, 0, data, &ti_thermal_ops,
- NULL, FAST_TEMP_MONITORING_RATE,
- FAST_TEMP_MONITORING_RATE);
- if (IS_ERR_OR_NULL(data->ti_thermal)) {
- dev_err(bgp->dev, "thermal zone device is NULL\n");
- return PTR_ERR(data->ti_thermal);
- }
- data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
- ti_bandgap_set_sensor_data(bgp, id, data);
-
- return 0;
-}
-
-int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
-{
- struct ti_thermal_data *data;
-
- data = ti_bandgap_get_sensor_data(bgp, id);
-
- thermal_zone_device_unregister(data->ti_thermal);
-
- return 0;
-}
-
-int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
-{
- struct ti_thermal_data *data;
-
- data = ti_bandgap_get_sensor_data(bgp, id);
-
- schedule_work(&data->thermal_wq);
-
- return 0;
-}
-
-int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
-{
- struct ti_thermal_data *data;
-
- data = ti_bandgap_get_sensor_data(bgp, id);
- if (IS_ERR_OR_NULL(data))
- data = ti_thermal_build_data(bgp, id);
-
- if (!data)
- return -EINVAL;
-
- if (!cpufreq_get_current_driver()) {
- dev_dbg(bgp->dev, "no cpufreq driver yet\n");
- return -EPROBE_DEFER;
- }
-
- /* Register cooling device */
- data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
- if (IS_ERR_OR_NULL(data->cool_dev)) {
- dev_err(bgp->dev,
- "Failed to register cpufreq cooling device\n");
- return PTR_ERR(data->cool_dev);
- }
- ti_bandgap_set_sensor_data(bgp, id, data);
-
- return 0;
-}
-
-int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
-{
- struct ti_thermal_data *data;
-
- data = ti_bandgap_get_sensor_data(bgp, id);
- cpufreq_cooling_unregister(data->cool_dev);
-
- return 0;
-}
+++ /dev/null
-/*
- * OMAP thermal definitions
- *
- * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
- * Contact:
- * Eduardo Valentin <eduardo.valentin@ti.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-#ifndef __TI_THERMAL_H
-#define __TI_THERMAL_H
-
-#include "ti-bandgap.h"
-
-/* sensors gradient and offsets */
-#define OMAP_GRADIENT_SLOPE_4430 0
-#define OMAP_GRADIENT_CONST_4430 20000
-#define OMAP_GRADIENT_SLOPE_4460 348
-#define OMAP_GRADIENT_CONST_4460 -9301
-#define OMAP_GRADIENT_SLOPE_4470 308
-#define OMAP_GRADIENT_CONST_4470 -7896
-
-#define OMAP_GRADIENT_SLOPE_5430_CPU 65
-#define OMAP_GRADIENT_CONST_5430_CPU -1791
-#define OMAP_GRADIENT_SLOPE_5430_GPU 117
-#define OMAP_GRADIENT_CONST_5430_GPU -2992
-
-/* PCB sensor calculation constants */
-#define OMAP_GRADIENT_SLOPE_W_PCB_4430 0
-#define OMAP_GRADIENT_CONST_W_PCB_4430 20000
-#define OMAP_GRADIENT_SLOPE_W_PCB_4460 1142
-#define OMAP_GRADIENT_CONST_W_PCB_4460 -393
-#define OMAP_GRADIENT_SLOPE_W_PCB_4470 1063
-#define OMAP_GRADIENT_CONST_W_PCB_4470 -477
-
-#define OMAP_GRADIENT_SLOPE_W_PCB_5430_CPU 100
-#define OMAP_GRADIENT_CONST_W_PCB_5430_CPU 484
-#define OMAP_GRADIENT_SLOPE_W_PCB_5430_GPU 464
-#define OMAP_GRADIENT_CONST_W_PCB_5430_GPU -5102
-
-/* trip points of interest in milicelsius (at hotspot level) */
-#define OMAP_TRIP_COLD 100000
-#define OMAP_TRIP_HOT 110000
-#define OMAP_TRIP_SHUTDOWN 125000
-#define OMAP_TRIP_NUMBER 2
-#define OMAP_TRIP_STEP \
- ((OMAP_TRIP_SHUTDOWN - OMAP_TRIP_HOT) / (OMAP_TRIP_NUMBER - 1))
-
-/* Update rates */
-#define FAST_TEMP_MONITORING_RATE 250
-
-/* helper macros */
-/**
- * ti_thermal_get_trip_value - returns trip temperature based on index
- * @i: trip index
- */
-#define ti_thermal_get_trip_value(i) \
- (OMAP_TRIP_HOT + ((i) * OMAP_TRIP_STEP))
-
-/**
- * ti_thermal_is_valid_trip - check for trip index
- * @i: trip index
- */
-#define ti_thermal_is_valid_trip(trip) \
- ((trip) >= 0 && (trip) < OMAP_TRIP_NUMBER)
-
-#ifdef CONFIG_TI_THERMAL
-int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, char *domain);
-int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id);
-int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id);
-int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id);
-int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id);
-#else
-static inline
-int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, char *domain)
-{
- return 0;
-}
-
-static inline
-int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
-{
- return 0;
-}
-
-static inline
-int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
-{
- return 0;
-}
-
-static inline
-int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
-{
- return 0;
-}
-
-static inline
-int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
-{
- return 0;
-}
-#endif
-#endif
+++ /dev/null
-* Texas Instrument OMAP SCM bandgap bindings
-
-In the System Control Module, OMAP supplies a voltage reference
-and a temperature sensor feature that are gathered in the band
-gap voltage and temperature sensor (VBGAPTS) module. The band
-gap provides current and voltage reference for its internal
-circuits and other analog IP blocks. The analog-to-digital
-converter (ADC) produces an output value that is proportional
-to the silicon temperature.
-
-Required properties:
-- compatible : Should be:
- - "ti,omap4430-bandgap" : for OMAP4430 bandgap
- - "ti,omap4460-bandgap" : for OMAP4460 bandgap
- - "ti,omap4470-bandgap" : for OMAP4470 bandgap
- - "ti,omap5430-bandgap" : for OMAP5430 bandgap
-- interrupts : this entry should indicate which interrupt line
-the talert signal is routed to;
-Specific:
-- ti,tshut-gpio : this entry should be used to inform which GPIO
-line the tshut signal is routed to;
-- regs : this entry must also be specified and it is specific
-to each bandgap version, because the mapping may change from
-soc to soc, apart of depending on available features.
-
-Example:
-OMAP4430:
-bandgap {
- reg = <0x4a002260 0x4 0x4a00232C 0x4>;
- compatible = "ti,omap4430-bandgap";
-};
-
-OMAP4460:
-bandgap {
- reg = <0x4a002260 0x4
- 0x4a00232C 0x4
- 0x4a002378 0x18>;
- compatible = "ti,omap4460-bandgap";
- interrupts = <0 126 4>; /* talert */
- ti,tshut-gpio = <86>;
-};
-
-OMAP4470:
-bandgap {
- reg = <0x4a002260 0x4
- 0x4a00232C 0x4
- 0x4a002378 0x18>;
- compatible = "ti,omap4470-bandgap";
- interrupts = <0 126 4>; /* talert */
- ti,tshut-gpio = <86>;
-};
-
-OMAP5430:
-bandgap {
- reg = <0x4a0021e0 0xc
- 0x4a00232c 0xc
- 0x4a002380 0x2c
- 0x4a0023C0 0x3c>;
- compatible = "ti,omap5430-bandgap";
-};
enforce idle time which results in more package C-state residency. The
user interface is exposed via generic thermal framework.
+menu "Texas Instruments thermal drivers"
+source "drivers/thermal/ti-soc-thermal/Kconfig"
+endmenu
endif
obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o
obj-$(CONFIG_DB8500_CPUFREQ_COOLING) += db8500_cpufreq_cooling.o
obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o
-
+obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/
--- /dev/null
+config TI_SOC_THERMAL
+ tristate "Texas Instruments SoCs temperature sensor driver"
+ depends on THERMAL
+ depends on ARCH_HAS_BANDGAP
+ help
+ If you say yes here you get support for the Texas Instruments
+ OMAP4460+ on die bandgap temperature sensor support. The register
+ set is part of system control module.
+
+ This includes alert interrupts generation and also the TSHUT
+ support.
+
+config TI_THERMAL
+ bool "Texas Instruments SoCs thermal framework support"
+ depends on TI_SOC_THERMAL
+ depends on CPU_THERMAL
+ help
+ If you say yes here you want to get support for generic thermal
+ framework for the Texas Instruments on die bandgap temperature sensor.
+
+ This includes trip points definitions, extrapolation rules and
+ CPU cooling device bindings.
+
+config OMAP4_THERMAL
+ bool "Texas Instruments OMAP4 thermal support"
+ depends on TI_SOC_THERMAL
+ depends on ARCH_OMAP4
+ help
+ If you say yes here you get thermal support for the Texas Instruments
+ OMAP4 SoC family. The current chip supported are:
+ - OMAP4430
+ - OMAP4460
+ - OMAP4470
+
+ This includes alert interrupts generation and also the TSHUT
+ support.
+
+config OMAP5_THERMAL
+ bool "Texas Instruments OMAP5 thermal support"
+ depends on TI_SOC_THERMAL
+ depends on SOC_OMAP5
+ help
+ If you say yes here you get thermal support for the Texas Instruments
+ OMAP5 SoC family. The current chip supported are:
+ - OMAP5430
+
+ This includes alert interrupts generation and also the TSHUT
+ support.
--- /dev/null
+obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal.o
+ti-soc-thermal-y := ti-bandgap.o
+ti-soc-thermal-$(CONFIG_TI_THERMAL) += ti-thermal-common.o
+ti-soc-thermal-$(CONFIG_OMAP4_THERMAL) += omap4-thermal-data.o
+ti-soc-thermal-$(CONFIG_OMAP5_THERMAL) += omap5-thermal-data.o
--- /dev/null
+List of TODOs (by Eduardo Valentin)
+
+on ti-bandgap.c:
+- Revisit PM support
+
+on ti-thermal-common.c/ti-thermal.h:
+- Revisit need for locking
+
+generally:
+- make sure this code works on OMAP4430, OMAP4460 and OMAP5430
+
+Copy patches to Eduardo Valentin <eduardo.valentin@ti.com>
--- /dev/null
+/*
+ * OMAP4 thermal driver.
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Inc.
+ * Contact:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "ti-thermal.h"
+#include "ti-bandgap.h"
+#include "omap4xxx-bandgap.h"
+
+/*
+ * OMAP4430 has one instance of thermal sensor for MPU
+ * need to describe the individual bit fields
+ */
+static struct temp_sensor_registers
+omap4430_mpu_temp_sensor_registers = {
+ .temp_sensor_ctrl = OMAP4430_TEMP_SENSOR_CTRL_OFFSET,
+ .bgap_tempsoff_mask = OMAP4430_BGAP_TEMPSOFF_MASK,
+ .bgap_soc_mask = OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK,
+ .bgap_eocz_mask = OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK,
+ .bgap_dtemp_mask = OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK,
+
+ .bgap_mode_ctrl = OMAP4430_TEMP_SENSOR_CTRL_OFFSET,
+ .mode_ctrl_mask = OMAP4430_SINGLE_MODE_MASK,
+
+ .bgap_efuse = OMAP4430_FUSE_OPP_BGAP,
+};
+
+/* Thresholds and limits for OMAP4430 MPU temperature sensor */
+static struct temp_sensor_data omap4430_mpu_temp_sensor_data = {
+ .min_freq = OMAP4430_MIN_FREQ,
+ .max_freq = OMAP4430_MAX_FREQ,
+ .max_temp = OMAP4430_MAX_TEMP,
+ .min_temp = OMAP4430_MIN_TEMP,
+ .hyst_val = OMAP4430_HYST_VAL,
+};
+
+/*
+ * Temperature values in milli degree celsius
+ * ADC code values from 530 to 923
+ */
+static const int
+omap4430_adc_to_temp[OMAP4430_ADC_END_VALUE - OMAP4430_ADC_START_VALUE + 1] = {
+ -38000, -35000, -34000, -32000, -30000, -28000, -26000, -24000, -22000,
+ -20000, -18000, -17000, -15000, -13000, -12000, -10000, -8000, -6000,
+ -5000, -3000, -1000, 0, 2000, 3000, 5000, 6000, 8000, 10000, 12000,
+ 13000, 15000, 17000, 19000, 21000, 23000, 25000, 27000, 28000, 30000,
+ 32000, 33000, 35000, 37000, 38000, 40000, 42000, 43000, 45000, 47000,
+ 48000, 50000, 52000, 53000, 55000, 57000, 58000, 60000, 62000, 64000,
+ 66000, 68000, 70000, 71000, 73000, 75000, 77000, 78000, 80000, 82000,
+ 83000, 85000, 87000, 88000, 90000, 92000, 93000, 95000, 97000, 98000,
+ 100000, 102000, 103000, 105000, 107000, 109000, 111000, 113000, 115000,
+ 117000, 118000, 120000, 122000, 123000,
+};
+
+/* OMAP4430 data */
+const struct ti_bandgap_data omap4430_data = {
+ .features = TI_BANDGAP_FEATURE_MODE_CONFIG |
+ TI_BANDGAP_FEATURE_CLK_CTRL |
+ TI_BANDGAP_FEATURE_POWER_SWITCH,
+ .fclock_name = "bandgap_fclk",
+ .div_ck_name = "bandgap_fclk",
+ .conv_table = omap4430_adc_to_temp,
+ .adc_start_val = OMAP4430_ADC_START_VALUE,
+ .adc_end_val = OMAP4430_ADC_END_VALUE,
+ .expose_sensor = ti_thermal_expose_sensor,
+ .remove_sensor = ti_thermal_remove_sensor,
+ .sensors = {
+ {
+ .registers = &omap4430_mpu_temp_sensor_registers,
+ .ts_data = &omap4430_mpu_temp_sensor_data,
+ .domain = "cpu",
+ .slope = OMAP_GRADIENT_SLOPE_4430,
+ .constant = OMAP_GRADIENT_CONST_4430,
+ .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_4430,
+ .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_4430,
+ .register_cooling = ti_thermal_register_cpu_cooling,
+ .unregister_cooling = ti_thermal_unregister_cpu_cooling,
+ },
+ },
+ .sensor_count = 1,
+};
+/*
+ * OMAP4460 has one instance of thermal sensor for MPU
+ * need to describe the individual bit fields
+ */
+static struct temp_sensor_registers
+omap4460_mpu_temp_sensor_registers = {
+ .temp_sensor_ctrl = OMAP4460_TEMP_SENSOR_CTRL_OFFSET,
+ .bgap_tempsoff_mask = OMAP4460_BGAP_TEMPSOFF_MASK,
+ .bgap_soc_mask = OMAP4460_BGAP_TEMP_SENSOR_SOC_MASK,
+ .bgap_eocz_mask = OMAP4460_BGAP_TEMP_SENSOR_EOCZ_MASK,
+ .bgap_dtemp_mask = OMAP4460_BGAP_TEMP_SENSOR_DTEMP_MASK,
+
+ .bgap_mask_ctrl = OMAP4460_BGAP_CTRL_OFFSET,
+ .mask_hot_mask = OMAP4460_MASK_HOT_MASK,
+ .mask_cold_mask = OMAP4460_MASK_COLD_MASK,
+
+ .bgap_mode_ctrl = OMAP4460_BGAP_CTRL_OFFSET,
+ .mode_ctrl_mask = OMAP4460_SINGLE_MODE_MASK,
+
+ .bgap_counter = OMAP4460_BGAP_COUNTER_OFFSET,
+ .counter_mask = OMAP4460_COUNTER_MASK,
+
+ .bgap_threshold = OMAP4460_BGAP_THRESHOLD_OFFSET,
+ .threshold_thot_mask = OMAP4460_T_HOT_MASK,
+ .threshold_tcold_mask = OMAP4460_T_COLD_MASK,
+
+ .tshut_threshold = OMAP4460_BGAP_TSHUT_OFFSET,
+ .tshut_hot_mask = OMAP4460_TSHUT_HOT_MASK,
+ .tshut_cold_mask = OMAP4460_TSHUT_COLD_MASK,
+
+ .bgap_status = OMAP4460_BGAP_STATUS_OFFSET,
+ .status_clean_stop_mask = OMAP4460_CLEAN_STOP_MASK,
+ .status_bgap_alert_mask = OMAP4460_BGAP_ALERT_MASK,
+ .status_hot_mask = OMAP4460_HOT_FLAG_MASK,
+ .status_cold_mask = OMAP4460_COLD_FLAG_MASK,
+
+ .bgap_efuse = OMAP4460_FUSE_OPP_BGAP,
+};
+
+/* Thresholds and limits for OMAP4460 MPU temperature sensor */
+static struct temp_sensor_data omap4460_mpu_temp_sensor_data = {
+ .tshut_hot = OMAP4460_TSHUT_HOT,
+ .tshut_cold = OMAP4460_TSHUT_COLD,
+ .t_hot = OMAP4460_T_HOT,
+ .t_cold = OMAP4460_T_COLD,
+ .min_freq = OMAP4460_MIN_FREQ,
+ .max_freq = OMAP4460_MAX_FREQ,
+ .max_temp = OMAP4460_MAX_TEMP,
+ .min_temp = OMAP4460_MIN_TEMP,
+ .hyst_val = OMAP4460_HYST_VAL,
+ .update_int1 = 1000,
+ .update_int2 = 2000,
+};
+
+/*
+ * Temperature values in milli degree celsius
+ * ADC code values from 530 to 923
+ */
+static const int
+omap4460_adc_to_temp[OMAP4460_ADC_END_VALUE - OMAP4460_ADC_START_VALUE + 1] = {
+ -40000, -40000, -40000, -40000, -39800, -39400, -39000, -38600, -38200,
+ -37800, -37300, -36800, -36400, -36000, -35600, -35200, -34800,
+ -34300, -33800, -33400, -33000, -32600, -32200, -31800, -31300,
+ -30800, -30400, -30000, -29600, -29200, -28700, -28200, -27800,
+ -27400, -27000, -26600, -26200, -25700, -25200, -24800, -24400,
+ -24000, -23600, -23200, -22700, -22200, -21800, -21400, -21000,
+ -20600, -20200, -19700, -19200, -18800, -18400, -18000, -17600,
+ -17200, -16700, -16200, -15800, -15400, -15000, -14600, -14200,
+ -13700, -13200, -12800, -12400, -12000, -11600, -11200, -10700,
+ -10200, -9800, -9400, -9000, -8600, -8200, -7700, -7200, -6800,
+ -6400, -6000, -5600, -5200, -4800, -4300, -3800, -3400, -3000,
+ -2600, -2200, -1800, -1300, -800, -400, 0, 400, 800, 1200, 1600,
+ 2100, 2600, 3000, 3400, 3800, 4200, 4600, 5100, 5600, 6000, 6400,
+ 6800, 7200, 7600, 8000, 8500, 9000, 9400, 9800, 10200, 10600, 11000,
+ 11400, 11900, 12400, 12800, 13200, 13600, 14000, 14400, 14800,
+ 15300, 15800, 16200, 16600, 17000, 17400, 17800, 18200, 18700,
+ 19200, 19600, 20000, 20400, 20800, 21200, 21600, 22100, 22600,
+ 23000, 23400, 23800, 24200, 24600, 25000, 25400, 25900, 26400,
+ 26800, 27200, 27600, 28000, 28400, 28800, 29300, 29800, 30200,
+ 30600, 31000, 31400, 31800, 32200, 32600, 33100, 33600, 34000,
+ 34400, 34800, 35200, 35600, 36000, 36400, 36800, 37300, 37800,
+ 38200, 38600, 39000, 39400, 39800, 40200, 40600, 41100, 41600,
+ 42000, 42400, 42800, 43200, 43600, 44000, 44400, 44800, 45300,
+ 45800, 46200, 46600, 47000, 47400, 47800, 48200, 48600, 49000,
+ 49500, 50000, 50400, 50800, 51200, 51600, 52000, 52400, 52800,
+ 53200, 53700, 54200, 54600, 55000, 55400, 55800, 56200, 56600,
+ 57000, 57400, 57800, 58200, 58700, 59200, 59600, 60000, 60400,
+ 60800, 61200, 61600, 62000, 62400, 62800, 63300, 63800, 64200,
+ 64600, 65000, 65400, 65800, 66200, 66600, 67000, 67400, 67800,
+ 68200, 68700, 69200, 69600, 70000, 70400, 70800, 71200, 71600,
+ 72000, 72400, 72800, 73200, 73600, 74100, 74600, 75000, 75400,
+ 75800, 76200, 76600, 77000, 77400, 77800, 78200, 78600, 79000,
+ 79400, 79800, 80300, 80800, 81200, 81600, 82000, 82400, 82800,
+ 83200, 83600, 84000, 84400, 84800, 85200, 85600, 86000, 86400,
+ 86800, 87300, 87800, 88200, 88600, 89000, 89400, 89800, 90200,
+ 90600, 91000, 91400, 91800, 92200, 92600, 93000, 93400, 93800,
+ 94200, 94600, 95000, 95500, 96000, 96400, 96800, 97200, 97600,
+ 98000, 98400, 98800, 99200, 99600, 100000, 100400, 100800, 101200,
+ 101600, 102000, 102400, 102800, 103200, 103600, 104000, 104400,
+ 104800, 105200, 105600, 106100, 106600, 107000, 107400, 107800,
+ 108200, 108600, 109000, 109400, 109800, 110200, 110600, 111000,
+ 111400, 111800, 112200, 112600, 113000, 113400, 113800, 114200,
+ 114600, 115000, 115400, 115800, 116200, 116600, 117000, 117400,
+ 117800, 118200, 118600, 119000, 119400, 119800, 120200, 120600,
+ 121000, 121400, 121800, 122200, 122600, 123000, 123400, 123800, 124200,
+ 124600, 124900, 125000, 125000, 125000, 125000
+};
+
+/* OMAP4460 data */
+const struct ti_bandgap_data omap4460_data = {
+ .features = TI_BANDGAP_FEATURE_TSHUT |
+ TI_BANDGAP_FEATURE_TSHUT_CONFIG |
+ TI_BANDGAP_FEATURE_TALERT |
+ TI_BANDGAP_FEATURE_MODE_CONFIG |
+ TI_BANDGAP_FEATURE_POWER_SWITCH |
+ TI_BANDGAP_FEATURE_CLK_CTRL |
+ TI_BANDGAP_FEATURE_COUNTER,
+ .fclock_name = "bandgap_ts_fclk",
+ .div_ck_name = "div_ts_ck",
+ .conv_table = omap4460_adc_to_temp,
+ .adc_start_val = OMAP4460_ADC_START_VALUE,
+ .adc_end_val = OMAP4460_ADC_END_VALUE,
+ .expose_sensor = ti_thermal_expose_sensor,
+ .remove_sensor = ti_thermal_remove_sensor,
+ .report_temperature = ti_thermal_report_sensor_temperature,
+ .sensors = {
+ {
+ .registers = &omap4460_mpu_temp_sensor_registers,
+ .ts_data = &omap4460_mpu_temp_sensor_data,
+ .domain = "cpu",
+ .slope = OMAP_GRADIENT_SLOPE_4460,
+ .constant = OMAP_GRADIENT_CONST_4460,
+ .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_4460,
+ .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_4460,
+ .register_cooling = ti_thermal_register_cpu_cooling,
+ .unregister_cooling = ti_thermal_unregister_cpu_cooling,
+ },
+ },
+ .sensor_count = 1,
+};
+
+/* OMAP4470 data */
+const struct ti_bandgap_data omap4470_data = {
+ .features = TI_BANDGAP_FEATURE_TSHUT |
+ TI_BANDGAP_FEATURE_TSHUT_CONFIG |
+ TI_BANDGAP_FEATURE_TALERT |
+ TI_BANDGAP_FEATURE_MODE_CONFIG |
+ TI_BANDGAP_FEATURE_POWER_SWITCH |
+ TI_BANDGAP_FEATURE_CLK_CTRL |
+ TI_BANDGAP_FEATURE_COUNTER,
+ .fclock_name = "bandgap_ts_fclk",
+ .div_ck_name = "div_ts_ck",
+ .conv_table = omap4460_adc_to_temp,
+ .adc_start_val = OMAP4460_ADC_START_VALUE,
+ .adc_end_val = OMAP4460_ADC_END_VALUE,
+ .expose_sensor = ti_thermal_expose_sensor,
+ .remove_sensor = ti_thermal_remove_sensor,
+ .report_temperature = ti_thermal_report_sensor_temperature,
+ .sensors = {
+ {
+ .registers = &omap4460_mpu_temp_sensor_registers,
+ .ts_data = &omap4460_mpu_temp_sensor_data,
+ .domain = "cpu",
+ .slope = OMAP_GRADIENT_SLOPE_4470,
+ .constant = OMAP_GRADIENT_CONST_4470,
+ .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_4470,
+ .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_4470,
+ .register_cooling = ti_thermal_register_cpu_cooling,
+ .unregister_cooling = ti_thermal_unregister_cpu_cooling,
+ },
+ },
+ .sensor_count = 1,
+};
--- /dev/null
+/*
+ * OMAP4xxx bandgap registers, bitfields and temperature definitions
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
+ * Contact:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+#ifndef __OMAP4XXX_BANDGAP_H
+#define __OMAP4XXX_BANDGAP_H
+
+/**
+ * *** OMAP4430 ***
+ *
+ * Below, in sequence, are the Register definitions,
+ * the bitfields and the temperature definitions for OMAP4430.
+ */
+
+/**
+ * OMAP4430 register definitions
+ *
+ * Registers are defined as offsets. The offsets are
+ * relative to FUSE_OPP_BGAP on 4430.
+ */
+
+/* OMAP4430.FUSE_OPP_BGAP */
+#define OMAP4430_FUSE_OPP_BGAP 0x0
+
+/* OMAP4430.TEMP_SENSOR */
+#define OMAP4430_TEMP_SENSOR_CTRL_OFFSET 0xCC
+
+/**
+ * Register and bit definitions for OMAP4430
+ *
+ * All the macros bellow define the required bits for
+ * controlling temperature on OMAP4430. Bit defines are
+ * grouped by register.
+ */
+
+/* OMAP4430.TEMP_SENSOR bits */
+#define OMAP4430_BGAP_TEMPSOFF_MASK BIT(12)
+#define OMAP4430_BGAP_TSHUT_MASK BIT(11)
+#define OMAP4430_SINGLE_MODE_MASK BIT(10)
+#define OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK BIT(9)
+#define OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK BIT(8)
+#define OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK (0xff << 0)
+
+/**
+ * Temperature limits and thresholds for OMAP4430
+ *
+ * All the macros bellow are definitions for handling the
+ * ADC conversions and representation of temperature limits
+ * and thresholds for OMAP4430.
+ */
+
+/* ADC conversion table limits */
+#define OMAP4430_ADC_START_VALUE 0
+#define OMAP4430_ADC_END_VALUE 127
+/* bandgap clock limits (no control on 4430) */
+#define OMAP4430_MAX_FREQ 32768
+#define OMAP4430_MIN_FREQ 32768
+/* sensor limits */
+#define OMAP4430_MIN_TEMP -40000
+#define OMAP4430_MAX_TEMP 125000
+#define OMAP4430_HYST_VAL 5000
+
+/**
+ * *** OMAP4460 *** Applicable for OMAP4470
+ *
+ * Below, in sequence, are the Register definitions,
+ * the bitfields and the temperature definitions for OMAP4460.
+ */
+
+/**
+ * OMAP4460 register definitions
+ *
+ * Registers are defined as offsets. The offsets are
+ * relative to FUSE_OPP_BGAP on 4460.
+ */
+
+/* OMAP4460.FUSE_OPP_BGAP */
+#define OMAP4460_FUSE_OPP_BGAP 0x0
+
+/* OMAP4460.TEMP_SENSOR */
+#define OMAP4460_TEMP_SENSOR_CTRL_OFFSET 0xCC
+
+/* OMAP4460.BANDGAP_CTRL */
+#define OMAP4460_BGAP_CTRL_OFFSET 0x118
+
+/* OMAP4460.BANDGAP_COUNTER */
+#define OMAP4460_BGAP_COUNTER_OFFSET 0x11C
+
+/* OMAP4460.BANDGAP_THRESHOLD */
+#define OMAP4460_BGAP_THRESHOLD_OFFSET 0x120
+
+/* OMAP4460.TSHUT_THRESHOLD */
+#define OMAP4460_BGAP_TSHUT_OFFSET 0x124
+
+/* OMAP4460.BANDGAP_STATUS */
+#define OMAP4460_BGAP_STATUS_OFFSET 0x128
+
+/**
+ * Register bitfields for OMAP4460
+ *
+ * All the macros bellow define the required bits for
+ * controlling temperature on OMAP4460. Bit defines are
+ * grouped by register.
+ */
+/* OMAP4460.TEMP_SENSOR bits */
+#define OMAP4460_BGAP_TEMPSOFF_MASK BIT(13)
+#define OMAP4460_BGAP_TEMP_SENSOR_SOC_MASK BIT(11)
+#define OMAP4460_BGAP_TEMP_SENSOR_EOCZ_MASK BIT(10)
+#define OMAP4460_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
+
+/* OMAP4460.BANDGAP_CTRL bits */
+#define OMAP4460_SINGLE_MODE_MASK BIT(31)
+#define OMAP4460_MASK_HOT_MASK BIT(1)
+#define OMAP4460_MASK_COLD_MASK BIT(0)
+
+/* OMAP4460.BANDGAP_COUNTER bits */
+#define OMAP4460_COUNTER_MASK (0xffffff << 0)
+
+/* OMAP4460.BANDGAP_THRESHOLD bits */
+#define OMAP4460_T_HOT_MASK (0x3ff << 16)
+#define OMAP4460_T_COLD_MASK (0x3ff << 0)
+
+/* OMAP4460.TSHUT_THRESHOLD bits */
+#define OMAP4460_TSHUT_HOT_MASK (0x3ff << 16)
+#define OMAP4460_TSHUT_COLD_MASK (0x3ff << 0)
+
+/* OMAP4460.BANDGAP_STATUS bits */
+#define OMAP4460_CLEAN_STOP_MASK BIT(3)
+#define OMAP4460_BGAP_ALERT_MASK BIT(2)
+#define OMAP4460_HOT_FLAG_MASK BIT(1)
+#define OMAP4460_COLD_FLAG_MASK BIT(0)
+
+/**
+ * Temperature limits and thresholds for OMAP4460
+ *
+ * All the macros bellow are definitions for handling the
+ * ADC conversions and representation of temperature limits
+ * and thresholds for OMAP4460.
+ */
+
+/* ADC conversion table limits */
+#define OMAP4460_ADC_START_VALUE 530
+#define OMAP4460_ADC_END_VALUE 932
+/* bandgap clock limits */
+#define OMAP4460_MAX_FREQ 1500000
+#define OMAP4460_MIN_FREQ 1000000
+/* sensor limits */
+#define OMAP4460_MIN_TEMP -40000
+#define OMAP4460_MAX_TEMP 123000
+#define OMAP4460_HYST_VAL 5000
+/* interrupts thresholds */
+#define OMAP4460_TSHUT_HOT 900 /* 122 deg C */
+#define OMAP4460_TSHUT_COLD 895 /* 100 deg C */
+#define OMAP4460_T_HOT 800 /* 73 deg C */
+#define OMAP4460_T_COLD 795 /* 71 deg C */
+
+#endif /* __OMAP4XXX_BANDGAP_H */
--- /dev/null
+/*
+ * OMAP5 thermal driver.
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Inc.
+ * Contact:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "ti-thermal.h"
+#include "ti-bandgap.h"
+#include "omap5xxx-bandgap.h"
+
+/*
+ * OMAP5430 has three instances of thermal sensor for MPU, GPU & CORE,
+ * need to describe the individual registers and bit fields.
+ */
+
+/*
+ * OMAP5430 MPU thermal sensor register offset and bit-fields
+ */
+static struct temp_sensor_registers
+omap5430_mpu_temp_sensor_registers = {
+ .temp_sensor_ctrl = OMAP5430_TEMP_SENSOR_MPU_OFFSET,
+ .bgap_tempsoff_mask = OMAP5430_BGAP_TEMPSOFF_MASK,
+ .bgap_eocz_mask = OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK,
+ .bgap_dtemp_mask = OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK,
+
+ .bgap_mask_ctrl = OMAP5430_BGAP_CTRL_OFFSET,
+ .mask_hot_mask = OMAP5430_MASK_HOT_MPU_MASK,
+ .mask_cold_mask = OMAP5430_MASK_COLD_MPU_MASK,
+ .mask_sidlemode_mask = OMAP5430_MASK_SIDLEMODE_MASK,
+ .mask_counter_delay_mask = OMAP5430_MASK_COUNTER_DELAY_MASK,
+ .mask_freeze_mask = OMAP5430_MASK_FREEZE_MPU_MASK,
+ .mask_clear_mask = OMAP5430_MASK_CLEAR_MPU_MASK,
+ .mask_clear_accum_mask = OMAP5430_MASK_CLEAR_ACCUM_MPU_MASK,
+
+
+ .bgap_counter = OMAP5430_BGAP_CTRL_OFFSET,
+ .counter_mask = OMAP5430_COUNTER_MASK,
+
+ .bgap_threshold = OMAP5430_BGAP_THRESHOLD_MPU_OFFSET,
+ .threshold_thot_mask = OMAP5430_T_HOT_MASK,
+ .threshold_tcold_mask = OMAP5430_T_COLD_MASK,
+
+ .tshut_threshold = OMAP5430_BGAP_TSHUT_MPU_OFFSET,
+ .tshut_hot_mask = OMAP5430_TSHUT_HOT_MASK,
+ .tshut_cold_mask = OMAP5430_TSHUT_COLD_MASK,
+
+ .bgap_status = OMAP5430_BGAP_STATUS_OFFSET,
+ .status_clean_stop_mask = 0x0,
+ .status_bgap_alert_mask = OMAP5430_BGAP_ALERT_MASK,
+ .status_hot_mask = OMAP5430_HOT_MPU_FLAG_MASK,
+ .status_cold_mask = OMAP5430_COLD_MPU_FLAG_MASK,
+
+ .bgap_cumul_dtemp = OMAP5430_BGAP_CUMUL_DTEMP_MPU_OFFSET,
+ .ctrl_dtemp_0 = OMAP5430_BGAP_DTEMP_MPU_0_OFFSET,
+ .ctrl_dtemp_1 = OMAP5430_BGAP_DTEMP_MPU_1_OFFSET,
+ .ctrl_dtemp_2 = OMAP5430_BGAP_DTEMP_MPU_2_OFFSET,
+ .ctrl_dtemp_3 = OMAP5430_BGAP_DTEMP_MPU_3_OFFSET,
+ .ctrl_dtemp_4 = OMAP5430_BGAP_DTEMP_MPU_4_OFFSET,
+ .bgap_efuse = OMAP5430_FUSE_OPP_BGAP_MPU,
+};
+
+/*
+ * OMAP5430 GPU thermal sensor register offset and bit-fields
+ */
+static struct temp_sensor_registers
+omap5430_gpu_temp_sensor_registers = {
+ .temp_sensor_ctrl = OMAP5430_TEMP_SENSOR_GPU_OFFSET,
+ .bgap_tempsoff_mask = OMAP5430_BGAP_TEMPSOFF_MASK,
+ .bgap_eocz_mask = OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK,
+ .bgap_dtemp_mask = OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK,
+
+ .bgap_mask_ctrl = OMAP5430_BGAP_CTRL_OFFSET,
+ .mask_hot_mask = OMAP5430_MASK_HOT_GPU_MASK,
+ .mask_cold_mask = OMAP5430_MASK_COLD_GPU_MASK,
+ .mask_sidlemode_mask = OMAP5430_MASK_SIDLEMODE_MASK,
+ .mask_counter_delay_mask = OMAP5430_MASK_COUNTER_DELAY_MASK,
+ .mask_freeze_mask = OMAP5430_MASK_FREEZE_GPU_MASK,
+ .mask_clear_mask = OMAP5430_MASK_CLEAR_GPU_MASK,
+ .mask_clear_accum_mask = OMAP5430_MASK_CLEAR_ACCUM_GPU_MASK,
+
+ .bgap_counter = OMAP5430_BGAP_CTRL_OFFSET,
+ .counter_mask = OMAP5430_COUNTER_MASK,
+
+ .bgap_threshold = OMAP5430_BGAP_THRESHOLD_GPU_OFFSET,
+ .threshold_thot_mask = OMAP5430_T_HOT_MASK,
+ .threshold_tcold_mask = OMAP5430_T_COLD_MASK,
+
+ .tshut_threshold = OMAP5430_BGAP_TSHUT_GPU_OFFSET,
+ .tshut_hot_mask = OMAP5430_TSHUT_HOT_MASK,
+ .tshut_cold_mask = OMAP5430_TSHUT_COLD_MASK,
+
+ .bgap_status = OMAP5430_BGAP_STATUS_OFFSET,
+ .status_clean_stop_mask = 0x0,
+ .status_bgap_alert_mask = OMAP5430_BGAP_ALERT_MASK,
+ .status_hot_mask = OMAP5430_HOT_GPU_FLAG_MASK,
+ .status_cold_mask = OMAP5430_COLD_GPU_FLAG_MASK,
+
+ .bgap_cumul_dtemp = OMAP5430_BGAP_CUMUL_DTEMP_GPU_OFFSET,
+ .ctrl_dtemp_0 = OMAP5430_BGAP_DTEMP_GPU_0_OFFSET,
+ .ctrl_dtemp_1 = OMAP5430_BGAP_DTEMP_GPU_1_OFFSET,
+ .ctrl_dtemp_2 = OMAP5430_BGAP_DTEMP_GPU_2_OFFSET,
+ .ctrl_dtemp_3 = OMAP5430_BGAP_DTEMP_GPU_3_OFFSET,
+ .ctrl_dtemp_4 = OMAP5430_BGAP_DTEMP_GPU_4_OFFSET,
+
+ .bgap_efuse = OMAP5430_FUSE_OPP_BGAP_GPU,
+};
+
+/*
+ * OMAP5430 CORE thermal sensor register offset and bit-fields
+ */
+static struct temp_sensor_registers
+omap5430_core_temp_sensor_registers = {
+ .temp_sensor_ctrl = OMAP5430_TEMP_SENSOR_CORE_OFFSET,
+ .bgap_tempsoff_mask = OMAP5430_BGAP_TEMPSOFF_MASK,
+ .bgap_eocz_mask = OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK,
+ .bgap_dtemp_mask = OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK,
+
+ .bgap_mask_ctrl = OMAP5430_BGAP_CTRL_OFFSET,
+ .mask_hot_mask = OMAP5430_MASK_HOT_CORE_MASK,
+ .mask_cold_mask = OMAP5430_MASK_COLD_CORE_MASK,
+ .mask_sidlemode_mask = OMAP5430_MASK_SIDLEMODE_MASK,
+ .mask_counter_delay_mask = OMAP5430_MASK_COUNTER_DELAY_MASK,
+ .mask_freeze_mask = OMAP5430_MASK_FREEZE_CORE_MASK,
+ .mask_clear_mask = OMAP5430_MASK_CLEAR_CORE_MASK,
+ .mask_clear_accum_mask = OMAP5430_MASK_CLEAR_ACCUM_CORE_MASK,
+
+ .bgap_counter = OMAP5430_BGAP_CTRL_OFFSET,
+ .counter_mask = OMAP5430_COUNTER_MASK,
+
+ .bgap_threshold = OMAP5430_BGAP_THRESHOLD_CORE_OFFSET,
+ .threshold_thot_mask = OMAP5430_T_HOT_MASK,
+ .threshold_tcold_mask = OMAP5430_T_COLD_MASK,
+
+ .tshut_threshold = OMAP5430_BGAP_TSHUT_CORE_OFFSET,
+ .tshut_hot_mask = OMAP5430_TSHUT_HOT_MASK,
+ .tshut_cold_mask = OMAP5430_TSHUT_COLD_MASK,
+
+ .bgap_status = OMAP5430_BGAP_STATUS_OFFSET,
+ .status_clean_stop_mask = 0x0,
+ .status_bgap_alert_mask = OMAP5430_BGAP_ALERT_MASK,
+ .status_hot_mask = OMAP5430_HOT_CORE_FLAG_MASK,
+ .status_cold_mask = OMAP5430_COLD_CORE_FLAG_MASK,
+
+ .bgap_cumul_dtemp = OMAP5430_BGAP_CUMUL_DTEMP_CORE_OFFSET,
+ .ctrl_dtemp_0 = OMAP5430_BGAP_DTEMP_CORE_0_OFFSET,
+ .ctrl_dtemp_1 = OMAP5430_BGAP_DTEMP_CORE_1_OFFSET,
+ .ctrl_dtemp_2 = OMAP5430_BGAP_DTEMP_CORE_2_OFFSET,
+ .ctrl_dtemp_3 = OMAP5430_BGAP_DTEMP_CORE_3_OFFSET,
+ .ctrl_dtemp_4 = OMAP5430_BGAP_DTEMP_CORE_4_OFFSET,
+
+ .bgap_efuse = OMAP5430_FUSE_OPP_BGAP_CORE,
+};
+
+/* Thresholds and limits for OMAP5430 MPU temperature sensor */
+static struct temp_sensor_data omap5430_mpu_temp_sensor_data = {
+ .tshut_hot = OMAP5430_MPU_TSHUT_HOT,
+ .tshut_cold = OMAP5430_MPU_TSHUT_COLD,
+ .t_hot = OMAP5430_MPU_T_HOT,
+ .t_cold = OMAP5430_MPU_T_COLD,
+ .min_freq = OMAP5430_MPU_MIN_FREQ,
+ .max_freq = OMAP5430_MPU_MAX_FREQ,
+ .max_temp = OMAP5430_MPU_MAX_TEMP,
+ .min_temp = OMAP5430_MPU_MIN_TEMP,
+ .hyst_val = OMAP5430_MPU_HYST_VAL,
+ .update_int1 = 1000,
+ .update_int2 = 2000,
+};
+
+/* Thresholds and limits for OMAP5430 GPU temperature sensor */
+static struct temp_sensor_data omap5430_gpu_temp_sensor_data = {
+ .tshut_hot = OMAP5430_GPU_TSHUT_HOT,
+ .tshut_cold = OMAP5430_GPU_TSHUT_COLD,
+ .t_hot = OMAP5430_GPU_T_HOT,
+ .t_cold = OMAP5430_GPU_T_COLD,
+ .min_freq = OMAP5430_GPU_MIN_FREQ,
+ .max_freq = OMAP5430_GPU_MAX_FREQ,
+ .max_temp = OMAP5430_GPU_MAX_TEMP,
+ .min_temp = OMAP5430_GPU_MIN_TEMP,
+ .hyst_val = OMAP5430_GPU_HYST_VAL,
+ .update_int1 = 1000,
+ .update_int2 = 2000,
+};
+
+/* Thresholds and limits for OMAP5430 CORE temperature sensor */
+static struct temp_sensor_data omap5430_core_temp_sensor_data = {
+ .tshut_hot = OMAP5430_CORE_TSHUT_HOT,
+ .tshut_cold = OMAP5430_CORE_TSHUT_COLD,
+ .t_hot = OMAP5430_CORE_T_HOT,
+ .t_cold = OMAP5430_CORE_T_COLD,
+ .min_freq = OMAP5430_CORE_MIN_FREQ,
+ .max_freq = OMAP5430_CORE_MAX_FREQ,
+ .max_temp = OMAP5430_CORE_MAX_TEMP,
+ .min_temp = OMAP5430_CORE_MIN_TEMP,
+ .hyst_val = OMAP5430_CORE_HYST_VAL,
+ .update_int1 = 1000,
+ .update_int2 = 2000,
+};
+
+/*
+ * OMAP54xx ES2.0 : Temperature values in milli degree celsius
+ * ADC code values from 540 to 945
+ */
+static int
+omap5430_adc_to_temp[
+ OMAP5430_ADC_END_VALUE - OMAP5430_ADC_START_VALUE + 1] = {
+ /* Index 540 - 549 */
+ -40000, -40000, -40000, -40000, -39800, -39400, -39000, -38600, -38200,
+ -37800,
+ /* Index 550 - 559 */
+ -37400, -37000, -36600, -36200, -35800, -35300, -34700, -34200, -33800,
+ -33400,
+ /* Index 560 - 569 */
+ -33000, -32600, -32200, -31800, -31400, -31000, -30600, -30200, -29800,
+ -29400,
+ /* Index 570 - 579 */
+ -29000, -28600, -28200, -27700, -27100, -26600, -26200, -25800, -25400,
+ -25000,
+ /* Index 580 - 589 */
+ -24600, -24200, -23800, -23400, -23000, -22600, -22200, -21600, -21400,
+ -21000,
+ /* Index 590 - 599 */
+ -20500, -19900, -19400, -19000, -18600, -18200, -17800, -17400, -17000,
+ -16600,
+ /* Index 600 - 609 */
+ -16200, -15800, -15400, -15000, -14600, -14200, -13800, -13400, -13000,
+ -12500,
+ /* Index 610 - 619 */
+ -11900, -11400, -11000, -10600, -10200, -9800, -9400, -9000, -8600,
+ -8200,
+ /* Index 620 - 629 */
+ -7800, -7400, -7000, -6600, -6200, -5800, -5400, -5000, -4500, -3900,
+ /* Index 630 - 639 */
+ -3400, -3000, -2600, -2200, -1800, -1400, -1000, -600, -200, 200,
+ /* Index 640 - 649 */
+ 600, 1000, 1400, 1800, 2200, 2600, 3000, 3400, 3900, 4500,
+ /* Index 650 - 659 */
+ 5000, 5400, 5800, 6200, 6600, 7000, 7400, 7800, 8200, 8600,
+ /* Index 660 - 669 */
+ 9000, 9400, 9800, 10200, 10600, 11000, 11400, 11800, 12200, 12700,
+ /* Index 670 - 679 */
+ 13300, 13800, 14200, 14600, 15000, 15400, 15800, 16200, 16600, 17000,
+ /* Index 680 - 689 */
+ 17400, 17800, 18200, 18600, 19000, 19400, 19800, 20200, 20600, 21100,
+ /* Index 690 - 699 */
+ 21400, 21900, 22500, 23000, 23400, 23800, 24200, 24600, 25000, 25400,
+ /* Index 700 - 709 */
+ 25800, 26200, 26600, 27000, 27400, 27800, 28200, 28600, 29000, 29400,
+ /* Index 710 - 719 */
+ 29800, 30200, 30600, 31000, 31400, 31900, 32500, 33000, 33400, 33800,
+ /* Index 720 - 729 */
+ 34200, 34600, 35000, 35400, 35800, 36200, 36600, 37000, 37400, 37800,
+ /* Index 730 - 739 */
+ 38200, 38600, 39000, 39400, 39800, 40200, 40600, 41000, 41400, 41800,
+ /* Index 740 - 749 */
+ 42200, 42600, 43100, 43700, 44200, 44600, 45000, 45400, 45800, 46200,
+ /* Index 750 - 759 */
+ 46600, 47000, 47400, 47800, 48200, 48600, 49000, 49400, 49800, 50200,
+ /* Index 760 - 769 */
+ 50600, 51000, 51400, 51800, 52200, 52600, 53000, 53400, 53800, 54200,
+ /* Index 770 - 779 */
+ 54600, 55000, 55400, 55900, 56500, 57000, 57400, 57800, 58200, 58600,
+ /* Index 780 - 789 */
+ 59000, 59400, 59800, 60200, 60600, 61000, 61400, 61800, 62200, 62600,
+ /* Index 790 - 799 */
+ 63000, 63400, 63800, 64200, 64600, 65000, 65400, 65800, 66200, 66600,
+ /* Index 800 - 809 */
+ 67000, 67400, 67800, 68200, 68600, 69000, 69400, 69800, 70200, 70600,
+ /* Index 810 - 819 */
+ 71000, 71500, 72100, 72600, 73000, 73400, 73800, 74200, 74600, 75000,
+ /* Index 820 - 829 */
+ 75400, 75800, 76200, 76600, 77000, 77400, 77800, 78200, 78600, 79000,
+ /* Index 830 - 839 */
+ 79400, 79800, 80200, 80600, 81000, 81400, 81800, 82200, 82600, 83000,
+ /* Index 840 - 849 */
+ 83400, 83800, 84200, 84600, 85000, 85400, 85800, 86200, 86600, 87000,
+ /* Index 850 - 859 */
+ 87400, 87800, 88200, 88600, 89000, 89400, 89800, 90200, 90600, 91000,
+ /* Index 860 - 869 */
+ 91400, 91800, 92200, 92600, 93000, 93400, 93800, 94200, 94600, 95000,
+ /* Index 870 - 879 */
+ 95400, 95800, 96200, 96600, 97000, 97500, 98100, 98600, 99000, 99400,
+ /* Index 880 - 889 */
+ 99800, 100200, 100600, 101000, 101400, 101800, 102200, 102600, 103000,
+ 103400,
+ /* Index 890 - 899 */
+ 103800, 104200, 104600, 105000, 105400, 105800, 106200, 106600, 107000,
+ 107400,
+ /* Index 900 - 909 */
+ 107800, 108200, 108600, 109000, 109400, 109800, 110200, 110600, 111000,
+ 111400,
+ /* Index 910 - 919 */
+ 111800, 112200, 112600, 113000, 113400, 113800, 114200, 114600, 115000,
+ 115400,
+ /* Index 920 - 929 */
+ 115800, 116200, 116600, 117000, 117400, 117800, 118200, 118600, 119000,
+ 119400,
+ /* Index 930 - 939 */
+ 119800, 120200, 120600, 121000, 121400, 121800, 122400, 122600, 123000,
+ 123400,
+ /* Index 940 - 945 */
+ 123800, 1242000, 124600, 124900, 125000, 125000,
+};
+
+/* OMAP54xx ES2.0 data */
+const struct ti_bandgap_data omap5430_data = {
+ .features = TI_BANDGAP_FEATURE_TSHUT_CONFIG |
+ TI_BANDGAP_FEATURE_FREEZE_BIT |
+ TI_BANDGAP_FEATURE_TALERT |
+ TI_BANDGAP_FEATURE_COUNTER_DELAY |
+ TI_BANDGAP_FEATURE_HISTORY_BUFFER,
+ .fclock_name = "l3instr_ts_gclk_div",
+ .div_ck_name = "l3instr_ts_gclk_div",
+ .conv_table = omap5430_adc_to_temp,
+ .adc_start_val = OMAP5430_ADC_START_VALUE,
+ .adc_end_val = OMAP5430_ADC_END_VALUE,
+ .expose_sensor = ti_thermal_expose_sensor,
+ .remove_sensor = ti_thermal_remove_sensor,
+ .report_temperature = ti_thermal_report_sensor_temperature,
+ .sensors = {
+ {
+ .registers = &omap5430_mpu_temp_sensor_registers,
+ .ts_data = &omap5430_mpu_temp_sensor_data,
+ .domain = "cpu",
+ .register_cooling = ti_thermal_register_cpu_cooling,
+ .unregister_cooling = ti_thermal_unregister_cpu_cooling,
+ .slope = OMAP_GRADIENT_SLOPE_5430_CPU,
+ .constant = OMAP_GRADIENT_CONST_5430_CPU,
+ .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_5430_CPU,
+ .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_5430_CPU,
+ },
+ {
+ .registers = &omap5430_gpu_temp_sensor_registers,
+ .ts_data = &omap5430_gpu_temp_sensor_data,
+ .domain = "gpu",
+ .slope = OMAP_GRADIENT_SLOPE_5430_GPU,
+ .constant = OMAP_GRADIENT_CONST_5430_GPU,
+ .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_5430_GPU,
+ .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_5430_GPU,
+ },
+ {
+ .registers = &omap5430_core_temp_sensor_registers,
+ .ts_data = &omap5430_core_temp_sensor_data,
+ .domain = "core",
+ },
+ },
+ .sensor_count = 3,
+};
--- /dev/null
+/*
+ * OMAP5xxx bandgap registers, bitfields and temperature definitions
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
+ * Contact:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+#ifndef __OMAP5XXX_BANDGAP_H
+#define __OMAP5XXX_BANDGAP_H
+
+/**
+ * *** OMAP5430 ***
+ *
+ * Below, in sequence, are the Register definitions,
+ * the bitfields and the temperature definitions for OMAP5430.
+ */
+
+/**
+ * OMAP5430 register definitions
+ *
+ * Registers are defined as offsets. The offsets are
+ * relative to FUSE_OPP_BGAP_GPU on 5430.
+ *
+ * Register below are grouped by domain (not necessarily in offset order)
+ */
+
+/* OMAP5430.GPU register offsets */
+#define OMAP5430_FUSE_OPP_BGAP_GPU 0x0
+#define OMAP5430_TEMP_SENSOR_GPU_OFFSET 0x150
+#define OMAP5430_BGAP_THRESHOLD_GPU_OFFSET 0x1A8
+#define OMAP5430_BGAP_TSHUT_GPU_OFFSET 0x1B4
+#define OMAP5430_BGAP_CUMUL_DTEMP_GPU_OFFSET 0x1C0
+#define OMAP5430_BGAP_DTEMP_GPU_0_OFFSET 0x1F4
+#define OMAP5430_BGAP_DTEMP_GPU_1_OFFSET 0x1F8
+#define OMAP5430_BGAP_DTEMP_GPU_2_OFFSET 0x1FC
+#define OMAP5430_BGAP_DTEMP_GPU_3_OFFSET 0x200
+#define OMAP5430_BGAP_DTEMP_GPU_4_OFFSET 0x204
+
+/* OMAP5430.MPU register offsets */
+#define OMAP5430_FUSE_OPP_BGAP_MPU 0x4
+#define OMAP5430_TEMP_SENSOR_MPU_OFFSET 0x14C
+#define OMAP5430_BGAP_THRESHOLD_MPU_OFFSET 0x1A4
+#define OMAP5430_BGAP_TSHUT_MPU_OFFSET 0x1B0
+#define OMAP5430_BGAP_CUMUL_DTEMP_MPU_OFFSET 0x1BC
+#define OMAP5430_BGAP_DTEMP_MPU_0_OFFSET 0x1E0
+#define OMAP5430_BGAP_DTEMP_MPU_1_OFFSET 0x1E4
+#define OMAP5430_BGAP_DTEMP_MPU_2_OFFSET 0x1E8
+#define OMAP5430_BGAP_DTEMP_MPU_3_OFFSET 0x1EC
+#define OMAP5430_BGAP_DTEMP_MPU_4_OFFSET 0x1F0
+
+/* OMAP5430.MPU register offsets */
+#define OMAP5430_FUSE_OPP_BGAP_CORE 0x8
+#define OMAP5430_TEMP_SENSOR_CORE_OFFSET 0x154
+#define OMAP5430_BGAP_THRESHOLD_CORE_OFFSET 0x1AC
+#define OMAP5430_BGAP_TSHUT_CORE_OFFSET 0x1B8
+#define OMAP5430_BGAP_CUMUL_DTEMP_CORE_OFFSET 0x1C4
+#define OMAP5430_BGAP_DTEMP_CORE_0_OFFSET 0x208
+#define OMAP5430_BGAP_DTEMP_CORE_1_OFFSET 0x20C
+#define OMAP5430_BGAP_DTEMP_CORE_2_OFFSET 0x210
+#define OMAP5430_BGAP_DTEMP_CORE_3_OFFSET 0x214
+#define OMAP5430_BGAP_DTEMP_CORE_4_OFFSET 0x218
+
+/* OMAP5430.common register offsets */
+#define OMAP5430_BGAP_CTRL_OFFSET 0x1A0
+#define OMAP5430_BGAP_STATUS_OFFSET 0x1C8
+
+/**
+ * Register bitfields for OMAP5430
+ *
+ * All the macros bellow define the required bits for
+ * controlling temperature on OMAP5430. Bit defines are
+ * grouped by register.
+ */
+
+/* OMAP5430.TEMP_SENSOR */
+#define OMAP5430_BGAP_TEMP_SENSOR_SOC_MASK BIT(12)
+#define OMAP5430_BGAP_TEMPSOFF_MASK BIT(11)
+#define OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK BIT(10)
+#define OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
+
+/* OMAP5430.BANDGAP_CTRL */
+#define OMAP5430_MASK_SIDLEMODE_MASK (0x3 << 30)
+#define OMAP5430_MASK_COUNTER_DELAY_MASK (0x7 << 27)
+#define OMAP5430_MASK_FREEZE_CORE_MASK BIT(23)
+#define OMAP5430_MASK_FREEZE_GPU_MASK BIT(22)
+#define OMAP5430_MASK_FREEZE_MPU_MASK BIT(21)
+#define OMAP5430_MASK_CLEAR_CORE_MASK BIT(20)
+#define OMAP5430_MASK_CLEAR_GPU_MASK BIT(19)
+#define OMAP5430_MASK_CLEAR_MPU_MASK BIT(18)
+#define OMAP5430_MASK_CLEAR_ACCUM_CORE_MASK BIT(17)
+#define OMAP5430_MASK_CLEAR_ACCUM_GPU_MASK BIT(16)
+#define OMAP5430_MASK_CLEAR_ACCUM_MPU_MASK BIT(15)
+#define OMAP5430_MASK_HOT_CORE_MASK BIT(5)
+#define OMAP5430_MASK_COLD_CORE_MASK BIT(4)
+#define OMAP5430_MASK_HOT_GPU_MASK BIT(3)
+#define OMAP5430_MASK_COLD_GPU_MASK BIT(2)
+#define OMAP5430_MASK_HOT_MPU_MASK BIT(1)
+#define OMAP5430_MASK_COLD_MPU_MASK BIT(0)
+
+/* OMAP5430.BANDGAP_COUNTER */
+#define OMAP5430_COUNTER_MASK (0xffffff << 0)
+
+/* OMAP5430.BANDGAP_THRESHOLD */
+#define OMAP5430_T_HOT_MASK (0x3ff << 16)
+#define OMAP5430_T_COLD_MASK (0x3ff << 0)
+
+/* OMAP5430.TSHUT_THRESHOLD */
+#define OMAP5430_TSHUT_HOT_MASK (0x3ff << 16)
+#define OMAP5430_TSHUT_COLD_MASK (0x3ff << 0)
+
+/* OMAP5430.BANDGAP_CUMUL_DTEMP_MPU */
+#define OMAP5430_CUMUL_DTEMP_MPU_MASK (0xffffffff << 0)
+
+/* OMAP5430.BANDGAP_CUMUL_DTEMP_GPU */
+#define OMAP5430_CUMUL_DTEMP_GPU_MASK (0xffffffff << 0)
+
+/* OMAP5430.BANDGAP_CUMUL_DTEMP_CORE */
+#define OMAP5430_CUMUL_DTEMP_CORE_MASK (0xffffffff << 0)
+
+/* OMAP5430.BANDGAP_STATUS */
+#define OMAP5430_BGAP_ALERT_MASK BIT(31)
+#define OMAP5430_HOT_CORE_FLAG_MASK BIT(5)
+#define OMAP5430_COLD_CORE_FLAG_MASK BIT(4)
+#define OMAP5430_HOT_GPU_FLAG_MASK BIT(3)
+#define OMAP5430_COLD_GPU_FLAG_MASK BIT(2)
+#define OMAP5430_HOT_MPU_FLAG_MASK BIT(1)
+#define OMAP5430_COLD_MPU_FLAG_MASK BIT(0)
+
+/**
+ * Temperature limits and thresholds for OMAP5430
+ *
+ * All the macros bellow are definitions for handling the
+ * ADC conversions and representation of temperature limits
+ * and thresholds for OMAP5430. Definitions are grouped
+ * by temperature domain.
+ */
+
+/* OMAP5430.common temperature definitions */
+/* ADC conversion table limits */
+#define OMAP5430_ADC_START_VALUE 540
+#define OMAP5430_ADC_END_VALUE 945
+
+/* OMAP5430.GPU temperature definitions */
+/* bandgap clock limits */
+#define OMAP5430_GPU_MAX_FREQ 1500000
+#define OMAP5430_GPU_MIN_FREQ 1000000
+/* sensor limits */
+#define OMAP5430_GPU_MIN_TEMP -40000
+#define OMAP5430_GPU_MAX_TEMP 125000
+#define OMAP5430_GPU_HYST_VAL 5000
+/* interrupts thresholds */
+#define OMAP5430_GPU_TSHUT_HOT 915
+#define OMAP5430_GPU_TSHUT_COLD 900
+#define OMAP5430_GPU_T_HOT 800
+#define OMAP5430_GPU_T_COLD 795
+
+/* OMAP5430.MPU temperature definitions */
+/* bandgap clock limits */
+#define OMAP5430_MPU_MAX_FREQ 1500000
+#define OMAP5430_MPU_MIN_FREQ 1000000
+/* sensor limits */
+#define OMAP5430_MPU_MIN_TEMP -40000
+#define OMAP5430_MPU_MAX_TEMP 125000
+#define OMAP5430_MPU_HYST_VAL 5000
+/* interrupts thresholds */
+#define OMAP5430_MPU_TSHUT_HOT 915
+#define OMAP5430_MPU_TSHUT_COLD 900
+#define OMAP5430_MPU_T_HOT 800
+#define OMAP5430_MPU_T_COLD 795
+
+/* OMAP5430.CORE temperature definitions */
+/* bandgap clock limits */
+#define OMAP5430_CORE_MAX_FREQ 1500000
+#define OMAP5430_CORE_MIN_FREQ 1000000
+/* sensor limits */
+#define OMAP5430_CORE_MIN_TEMP -40000
+#define OMAP5430_CORE_MAX_TEMP 125000
+#define OMAP5430_CORE_HYST_VAL 5000
+/* interrupts thresholds */
+#define OMAP5430_CORE_TSHUT_HOT 915
+#define OMAP5430_CORE_TSHUT_COLD 900
+#define OMAP5430_CORE_T_HOT 800
+#define OMAP5430_CORE_T_COLD 795
+
+#endif /* __OMAP5XXX_BANDGAP_H */
--- /dev/null
+/*
+ * TI Bandgap temperature sensor driver
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: J Keerthy <j-keerthy@ti.com>
+ * Author: Moiz Sonasath <m-sonasath@ti.com>
+ * Couple of fixes, DT and MFD adaptation:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/reboot.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+
+#include "ti-bandgap.h"
+
+/*** Helper functions to access registers and their bitfields ***/
+
+/**
+ * ti_bandgap_readl() - simple read helper function
+ * @bgp: pointer to ti_bandgap structure
+ * @reg: desired register (offset) to be read
+ *
+ * Helper function to read bandgap registers. It uses the io remapped area.
+ * Return: the register value.
+ */
+static u32 ti_bandgap_readl(struct ti_bandgap *bgp, u32 reg)
+{
+ return readl(bgp->base + reg);
+}
+
+/**
+ * ti_bandgap_writel() - simple write helper function
+ * @bgp: pointer to ti_bandgap structure
+ * @val: desired register value to be written
+ * @reg: desired register (offset) to be written
+ *
+ * Helper function to write bandgap registers. It uses the io remapped area.
+ */
+static void ti_bandgap_writel(struct ti_bandgap *bgp, u32 val, u32 reg)
+{
+ writel(val, bgp->base + reg);
+}
+
+/**
+ * DOC: macro to update bits.
+ *
+ * RMW_BITS() - used to read, modify and update bandgap bitfields.
+ * The value passed will be shifted.
+ */
+#define RMW_BITS(bgp, id, reg, mask, val) \
+do { \
+ struct temp_sensor_registers *t; \
+ u32 r; \
+ \
+ t = bgp->conf->sensors[(id)].registers; \
+ r = ti_bandgap_readl(bgp, t->reg); \
+ r &= ~t->mask; \
+ r |= (val) << __ffs(t->mask); \
+ ti_bandgap_writel(bgp, r, t->reg); \
+} while (0)
+
+/*** Basic helper functions ***/
+
+/**
+ * ti_bandgap_power() - controls the power state of a bandgap device
+ * @bgp: pointer to ti_bandgap structure
+ * @on: desired power state (1 - on, 0 - off)
+ *
+ * Used to power on/off a bandgap device instance. Only used on those
+ * that features tempsoff bit.
+ *
+ * Return: 0 on success, -ENOTSUPP if tempsoff is not supported.
+ */
+static int ti_bandgap_power(struct ti_bandgap *bgp, bool on)
+{
+ int i, ret = 0;
+
+ if (!TI_BANDGAP_HAS(bgp, POWER_SWITCH)) {
+ ret = -ENOTSUPP;
+ goto exit;
+ }
+
+ for (i = 0; i < bgp->conf->sensor_count; i++)
+ /* active on 0 */
+ RMW_BITS(bgp, i, temp_sensor_ctrl, bgap_tempsoff_mask, !on);
+
+exit:
+ return ret;
+}
+
+/**
+ * ti_bandgap_read_temp() - helper function to read sensor temperature
+ * @bgp: pointer to ti_bandgap structure
+ * @id: bandgap sensor id
+ *
+ * Function to concentrate the steps to read sensor temperature register.
+ * This function is desired because, depending on bandgap device version,
+ * it might be needed to freeze the bandgap state machine, before fetching
+ * the register value.
+ *
+ * Return: temperature in ADC values.
+ */
+static u32 ti_bandgap_read_temp(struct ti_bandgap *bgp, int id)
+{
+ struct temp_sensor_registers *tsr;
+ u32 temp, reg;
+
+ tsr = bgp->conf->sensors[id].registers;
+ reg = tsr->temp_sensor_ctrl;
+
+ if (TI_BANDGAP_HAS(bgp, FREEZE_BIT)) {
+ RMW_BITS(bgp, id, bgap_mask_ctrl, mask_freeze_mask, 1);
+ /*
+ * In case we cannot read from cur_dtemp / dtemp_0,
+ * then we read from the last valid temp read
+ */
+ reg = tsr->ctrl_dtemp_1;
+ }
+
+ /* read temperature */
+ temp = ti_bandgap_readl(bgp, reg);
+ temp &= tsr->bgap_dtemp_mask;
+
+ if (TI_BANDGAP_HAS(bgp, FREEZE_BIT))
+ RMW_BITS(bgp, id, bgap_mask_ctrl, mask_freeze_mask, 0);
+
+ return temp;
+}
+
+/*** IRQ handlers ***/
+
+/**
+ * ti_bandgap_talert_irq_handler() - handles Temperature alert IRQs
+ * @irq: IRQ number
+ * @data: private data (struct ti_bandgap *)
+ *
+ * This is the Talert handler. Use it only if bandgap device features
+ * HAS(TALERT). This handler goes over all sensors and checks their
+ * conditions and acts accordingly. In case there are events pending,
+ * it will reset the event mask to wait for the opposite event (next event).
+ * Every time there is a new event, it will be reported to thermal layer.
+ *
+ * Return: IRQ_HANDLED
+ */
+static irqreturn_t ti_bandgap_talert_irq_handler(int irq, void *data)
+{
+ struct ti_bandgap *bgp = data;
+ struct temp_sensor_registers *tsr;
+ u32 t_hot = 0, t_cold = 0, ctrl;
+ int i;
+
+ spin_lock(&bgp->lock);
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ tsr = bgp->conf->sensors[i].registers;
+ ctrl = ti_bandgap_readl(bgp, tsr->bgap_status);
+
+ /* Read the status of t_hot */
+ t_hot = ctrl & tsr->status_hot_mask;
+
+ /* Read the status of t_cold */
+ t_cold = ctrl & tsr->status_cold_mask;
+
+ if (!t_cold && !t_hot)
+ continue;
+
+ ctrl = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
+ /*
+ * One TALERT interrupt: Two sources
+ * If the interrupt is due to t_hot then mask t_hot and
+ * and unmask t_cold else mask t_cold and unmask t_hot
+ */
+ if (t_hot) {
+ ctrl &= ~tsr->mask_hot_mask;
+ ctrl |= tsr->mask_cold_mask;
+ } else if (t_cold) {
+ ctrl &= ~tsr->mask_cold_mask;
+ ctrl |= tsr->mask_hot_mask;
+ }
+
+ ti_bandgap_writel(bgp, ctrl, tsr->bgap_mask_ctrl);
+
+ dev_dbg(bgp->dev,
+ "%s: IRQ from %s sensor: hotevent %d coldevent %d\n",
+ __func__, bgp->conf->sensors[i].domain,
+ t_hot, t_cold);
+
+ /* report temperature to whom may concern */
+ if (bgp->conf->report_temperature)
+ bgp->conf->report_temperature(bgp, i);
+ }
+ spin_unlock(&bgp->lock);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * ti_bandgap_tshut_irq_handler() - handles Temperature shutdown signal
+ * @irq: IRQ number
+ * @data: private data (unused)
+ *
+ * This is the Tshut handler. Use it only if bandgap device features
+ * HAS(TSHUT). If any sensor fires the Tshut signal, we simply shutdown
+ * the system.
+ *
+ * Return: IRQ_HANDLED
+ */
+static irqreturn_t ti_bandgap_tshut_irq_handler(int irq, void *data)
+{
+ pr_emerg("%s: TSHUT temperature reached. Needs shut down...\n",
+ __func__);
+
+ orderly_poweroff(true);
+
+ return IRQ_HANDLED;
+}
+
+/*** Helper functions which manipulate conversion ADC <-> mi Celsius ***/
+
+/**
+ * ti_bandgap_adc_to_mcelsius() - converts an ADC value to mCelsius scale
+ * @bgp: struct ti_bandgap pointer
+ * @adc_val: value in ADC representation
+ * @t: address where to write the resulting temperature in mCelsius
+ *
+ * Simple conversion from ADC representation to mCelsius. In case the ADC value
+ * is out of the ADC conv table range, it returns -ERANGE, 0 on success.
+ * The conversion table is indexed by the ADC values.
+ *
+ * Return: 0 if conversion was successful, else -ERANGE in case the @adc_val
+ * argument is out of the ADC conv table range.
+ */
+static
+int ti_bandgap_adc_to_mcelsius(struct ti_bandgap *bgp, int adc_val, int *t)
+{
+ const struct ti_bandgap_data *conf = bgp->conf;
+ int ret = 0;
+
+ /* look up for temperature in the table and return the temperature */
+ if (adc_val < conf->adc_start_val || adc_val > conf->adc_end_val) {
+ ret = -ERANGE;
+ goto exit;
+ }
+
+ *t = bgp->conf->conv_table[adc_val - conf->adc_start_val];
+
+exit:
+ return ret;
+}
+
+/**
+ * ti_bandgap_mcelsius_to_adc() - converts a mCelsius value to ADC scale
+ * @bgp: struct ti_bandgap pointer
+ * @temp: value in mCelsius
+ * @adc: address where to write the resulting temperature in ADC representation
+ *
+ * Simple conversion from mCelsius to ADC values. In case the temp value
+ * is out of the ADC conv table range, it returns -ERANGE, 0 on success.
+ * The conversion table is indexed by the ADC values.
+ *
+ * Return: 0 if conversion was successful, else -ERANGE in case the @temp
+ * argument is out of the ADC conv table range.
+ */
+static
+int ti_bandgap_mcelsius_to_adc(struct ti_bandgap *bgp, long temp, int *adc)
+{
+ const struct ti_bandgap_data *conf = bgp->conf;
+ const int *conv_table = bgp->conf->conv_table;
+ int high, low, mid, ret = 0;
+
+ low = 0;
+ high = conf->adc_end_val - conf->adc_start_val;
+ mid = (high + low) / 2;
+
+ if (temp < conv_table[low] || temp > conv_table[high]) {
+ ret = -ERANGE;
+ goto exit;
+ }
+
+ while (low < high) {
+ if (temp < conv_table[mid])
+ high = mid - 1;
+ else
+ low = mid + 1;
+ mid = (low + high) / 2;
+ }
+
+ *adc = conf->adc_start_val + low;
+
+exit:
+ return ret;
+}
+
+/**
+ * ti_bandgap_add_hyst() - add hysteresis (in mCelsius) to an ADC value
+ * @bgp: struct ti_bandgap pointer
+ * @adc_val: temperature value in ADC representation
+ * @hyst_val: hysteresis value in mCelsius
+ * @sum: address where to write the resulting temperature (in ADC scale)
+ *
+ * Adds an hysteresis value (in mCelsius) to a ADC temperature value.
+ *
+ * Return: 0 on success, -ERANGE otherwise.
+ */
+static
+int ti_bandgap_add_hyst(struct ti_bandgap *bgp, int adc_val, int hyst_val,
+ u32 *sum)
+{
+ int temp, ret;
+
+ /*
+ * Need to add in the mcelsius domain, so we have a temperature
+ * the conv_table range
+ */
+ ret = ti_bandgap_adc_to_mcelsius(bgp, adc_val, &temp);
+ if (ret < 0)
+ goto exit;
+
+ temp += hyst_val;
+
+ ret = ti_bandgap_mcelsius_to_adc(bgp, temp, sum);
+
+exit:
+ return ret;
+}
+
+/*** Helper functions handling device Alert/Shutdown signals ***/
+
+/**
+ * ti_bandgap_unmask_interrupts() - unmasks the events of thot & tcold
+ * @bgp: struct ti_bandgap pointer
+ * @id: bandgap sensor id
+ * @t_hot: hot temperature value to trigger alert signal
+ * @t_cold: cold temperature value to trigger alert signal
+ *
+ * Checks the requested t_hot and t_cold values and configures the IRQ event
+ * masks accordingly. Call this function only if bandgap features HAS(TALERT).
+ */
+static void ti_bandgap_unmask_interrupts(struct ti_bandgap *bgp, int id,
+ u32 t_hot, u32 t_cold)
+{
+ struct temp_sensor_registers *tsr;
+ u32 temp, reg_val;
+
+ /* Read the current on die temperature */
+ temp = ti_bandgap_read_temp(bgp, id);
+
+ tsr = bgp->conf->sensors[id].registers;
+ reg_val = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
+
+ if (temp < t_hot)
+ reg_val |= tsr->mask_hot_mask;
+ else
+ reg_val &= ~tsr->mask_hot_mask;
+
+ if (t_cold < temp)
+ reg_val |= tsr->mask_cold_mask;
+ else
+ reg_val &= ~tsr->mask_cold_mask;
+ ti_bandgap_writel(bgp, reg_val, tsr->bgap_mask_ctrl);
+}
+
+/**
+ * ti_bandgap_update_alert_threshold() - sequence to update thresholds
+ * @bgp: struct ti_bandgap pointer
+ * @id: bandgap sensor id
+ * @val: value (ADC) of a new threshold
+ * @hot: desired threshold to be updated. true if threshold hot, false if
+ * threshold cold
+ *
+ * It will program the required thresholds (hot and cold) for TALERT signal.
+ * This function can be used to update t_hot or t_cold, depending on @hot value.
+ * It checks the resulting t_hot and t_cold values, based on the new passed @val
+ * and configures the thresholds so that t_hot is always greater than t_cold.
+ * Call this function only if bandgap features HAS(TALERT).
+ *
+ * Return: 0 if no error, else corresponding error
+ */
+static int ti_bandgap_update_alert_threshold(struct ti_bandgap *bgp, int id,
+ int val, bool hot)
+{
+ struct temp_sensor_data *ts_data = bgp->conf->sensors[id].ts_data;
+ struct temp_sensor_registers *tsr;
+ u32 thresh_val, reg_val, t_hot, t_cold;
+ int err = 0;
+
+ tsr = bgp->conf->sensors[id].registers;
+
+ /* obtain the current value */
+ thresh_val = ti_bandgap_readl(bgp, tsr->bgap_threshold);
+ t_cold = (thresh_val & tsr->threshold_tcold_mask) >>
+ __ffs(tsr->threshold_tcold_mask);
+ t_hot = (thresh_val & tsr->threshold_thot_mask) >>
+ __ffs(tsr->threshold_thot_mask);
+ if (hot)
+ t_hot = val;
+ else
+ t_cold = val;
+
+ if (t_cold > t_hot) {
+ if (hot)
+ err = ti_bandgap_add_hyst(bgp, t_hot,
+ -ts_data->hyst_val,
+ &t_cold);
+ else
+ err = ti_bandgap_add_hyst(bgp, t_cold,
+ ts_data->hyst_val,
+ &t_hot);
+ }
+
+ /* write the new threshold values */
+ reg_val = thresh_val &
+ ~(tsr->threshold_thot_mask | tsr->threshold_tcold_mask);
+ reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask)) |
+ (t_cold << __ffs(tsr->threshold_tcold_mask));
+ ti_bandgap_writel(bgp, reg_val, tsr->bgap_threshold);
+
+ if (err) {
+ dev_err(bgp->dev, "failed to reprogram thot threshold\n");
+ err = -EIO;
+ goto exit;
+ }
+
+ ti_bandgap_unmask_interrupts(bgp, id, t_hot, t_cold);
+exit:
+ return err;
+}
+
+/**
+ * ti_bandgap_validate() - helper to check the sanity of a struct ti_bandgap
+ * @bgp: struct ti_bandgap pointer
+ * @id: bandgap sensor id
+ *
+ * Checks if the bandgap pointer is valid and if the sensor id is also
+ * applicable.
+ *
+ * Return: 0 if no errors, -EINVAL for invalid @bgp pointer or -ERANGE if
+ * @id cannot index @bgp sensors.
+ */
+static inline int ti_bandgap_validate(struct ti_bandgap *bgp, int id)
+{
+ int ret = 0;
+
+ if (IS_ERR_OR_NULL(bgp)) {
+ pr_err("%s: invalid bandgap pointer\n", __func__);
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ if ((id < 0) || (id >= bgp->conf->sensor_count)) {
+ dev_err(bgp->dev, "%s: sensor id out of range (%d)\n",
+ __func__, id);
+ ret = -ERANGE;
+ }
+
+exit:
+ return ret;
+}
+
+/**
+ * _ti_bandgap_write_threshold() - helper to update TALERT t_cold or t_hot
+ * @bgp: struct ti_bandgap pointer
+ * @id: bandgap sensor id
+ * @val: value (mCelsius) of a new threshold
+ * @hot: desired threshold to be updated. true if threshold hot, false if
+ * threshold cold
+ *
+ * It will update the required thresholds (hot and cold) for TALERT signal.
+ * This function can be used to update t_hot or t_cold, depending on @hot value.
+ * Validates the mCelsius range and update the requested threshold.
+ * Call this function only if bandgap features HAS(TALERT).
+ *
+ * Return: 0 if no error, else corresponding error value.
+ */
+static int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val,
+ bool hot)
+{
+ struct temp_sensor_data *ts_data;
+ struct temp_sensor_registers *tsr;
+ u32 adc_val;
+ int ret;
+
+ ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ goto exit;
+
+ if (!TI_BANDGAP_HAS(bgp, TALERT)) {
+ ret = -ENOTSUPP;
+ goto exit;
+ }
+
+ ts_data = bgp->conf->sensors[id].ts_data;
+ tsr = bgp->conf->sensors[id].registers;
+ if (hot) {
+ if (val < ts_data->min_temp + ts_data->hyst_val)
+ ret = -EINVAL;
+ } else {
+ if (val > ts_data->max_temp + ts_data->hyst_val)
+ ret = -EINVAL;
+ }
+
+ if (ret)
+ goto exit;
+
+ ret = ti_bandgap_mcelsius_to_adc(bgp, val, &adc_val);
+ if (ret < 0)
+ goto exit;
+
+ spin_lock(&bgp->lock);
+ ret = ti_bandgap_update_alert_threshold(bgp, id, adc_val, hot);
+ spin_unlock(&bgp->lock);
+
+exit:
+ return ret;
+}
+
+/**
+ * _ti_bandgap_read_threshold() - helper to read TALERT t_cold or t_hot
+ * @bgp: struct ti_bandgap pointer
+ * @id: bandgap sensor id
+ * @val: value (mCelsius) of a threshold
+ * @hot: desired threshold to be read. true if threshold hot, false if
+ * threshold cold
+ *
+ * It will fetch the required thresholds (hot and cold) for TALERT signal.
+ * This function can be used to read t_hot or t_cold, depending on @hot value.
+ * Call this function only if bandgap features HAS(TALERT).
+ *
+ * Return: 0 if no error, -ENOTSUPP if it has no TALERT support, or the
+ * corresponding error value if some operation fails.
+ */
+static int _ti_bandgap_read_threshold(struct ti_bandgap *bgp, int id,
+ int *val, bool hot)
+{
+ struct temp_sensor_registers *tsr;
+ u32 temp, mask;
+ int ret = 0;
+
+ ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ goto exit;
+
+ if (!TI_BANDGAP_HAS(bgp, TALERT)) {
+ ret = -ENOTSUPP;
+ goto exit;
+ }
+
+ tsr = bgp->conf->sensors[id].registers;
+ if (hot)
+ mask = tsr->threshold_thot_mask;
+ else
+ mask = tsr->threshold_tcold_mask;
+
+ temp = ti_bandgap_readl(bgp, tsr->bgap_threshold);
+ temp = (temp & mask) >> __ffs(mask);
+ ret |= ti_bandgap_adc_to_mcelsius(bgp, temp, &temp);
+ if (ret) {
+ dev_err(bgp->dev, "failed to read thot\n");
+ ret = -EIO;
+ goto exit;
+ }
+
+ *val = temp;
+
+exit:
+ return ret;
+}
+
+/*** Exposed APIs ***/
+
+/**
+ * ti_bandgap_read_thot() - reads sensor current thot
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @thot: resulting current thot value
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot)
+{
+ return _ti_bandgap_read_threshold(bgp, id, thot, true);
+}
+
+/**
+ * ti_bandgap_write_thot() - sets sensor current thot
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @val: desired thot value
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val)
+{
+ return _ti_bandgap_write_threshold(bgp, id, val, true);
+}
+
+/**
+ * ti_bandgap_read_tcold() - reads sensor current tcold
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @tcold: resulting current tcold value
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold)
+{
+ return _ti_bandgap_read_threshold(bgp, id, tcold, false);
+}
+
+/**
+ * ti_bandgap_write_tcold() - sets the sensor tcold
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @val: desired tcold value
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val)
+{
+ return _ti_bandgap_write_threshold(bgp, id, val, false);
+}
+
+/**
+ * ti_bandgap_read_counter() - read the sensor counter
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @interval: resulting update interval in miliseconds
+ */
+static void ti_bandgap_read_counter(struct ti_bandgap *bgp, int id,
+ int *interval)
+{
+ struct temp_sensor_registers *tsr;
+ int time;
+
+ tsr = bgp->conf->sensors[id].registers;
+ time = ti_bandgap_readl(bgp, tsr->bgap_counter);
+ time = (time & tsr->counter_mask) >>
+ __ffs(tsr->counter_mask);
+ time = time * 1000 / bgp->clk_rate;
+ *interval = time;
+}
+
+/**
+ * ti_bandgap_read_counter_delay() - read the sensor counter delay
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @interval: resulting update interval in miliseconds
+ */
+static void ti_bandgap_read_counter_delay(struct ti_bandgap *bgp, int id,
+ int *interval)
+{
+ struct temp_sensor_registers *tsr;
+ int reg_val;
+
+ tsr = bgp->conf->sensors[id].registers;
+
+ reg_val = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
+ reg_val = (reg_val & tsr->mask_counter_delay_mask) >>
+ __ffs(tsr->mask_counter_delay_mask);
+ switch (reg_val) {
+ case 0:
+ *interval = 0;
+ break;
+ case 1:
+ *interval = 1;
+ break;
+ case 2:
+ *interval = 10;
+ break;
+ case 3:
+ *interval = 100;
+ break;
+ case 4:
+ *interval = 250;
+ break;
+ case 5:
+ *interval = 500;
+ break;
+ default:
+ dev_warn(bgp->dev, "Wrong counter delay value read from register %X",
+ reg_val);
+ }
+}
+
+/**
+ * ti_bandgap_read_update_interval() - read the sensor update interval
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @interval: resulting update interval in miliseconds
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id,
+ int *interval)
+{
+ int ret = 0;
+
+ ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ goto exit;
+
+ if (!TI_BANDGAP_HAS(bgp, COUNTER) &&
+ !TI_BANDGAP_HAS(bgp, COUNTER_DELAY)) {
+ ret = -ENOTSUPP;
+ goto exit;
+ }
+
+ if (TI_BANDGAP_HAS(bgp, COUNTER)) {
+ ti_bandgap_read_counter(bgp, id, interval);
+ goto exit;
+ }
+
+ ti_bandgap_read_counter_delay(bgp, id, interval);
+exit:
+ return ret;
+}
+
+/**
+ * ti_bandgap_write_counter_delay() - set the counter_delay
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @interval: desired update interval in miliseconds
+ *
+ * Return: 0 on success or the proper error code
+ */
+static int ti_bandgap_write_counter_delay(struct ti_bandgap *bgp, int id,
+ u32 interval)
+{
+ int rval;
+
+ switch (interval) {
+ case 0: /* Immediate conversion */
+ rval = 0x0;
+ break;
+ case 1: /* Conversion after ever 1ms */
+ rval = 0x1;
+ break;
+ case 10: /* Conversion after ever 10ms */
+ rval = 0x2;
+ break;
+ case 100: /* Conversion after ever 100ms */
+ rval = 0x3;
+ break;
+ case 250: /* Conversion after ever 250ms */
+ rval = 0x4;
+ break;
+ case 500: /* Conversion after ever 500ms */
+ rval = 0x5;
+ break;
+ default:
+ dev_warn(bgp->dev, "Delay %d ms is not supported\n", interval);
+ return -EINVAL;
+ }
+
+ spin_lock(&bgp->lock);
+ RMW_BITS(bgp, id, bgap_mask_ctrl, mask_counter_delay_mask, rval);
+ spin_unlock(&bgp->lock);
+
+ return 0;
+}
+
+/**
+ * ti_bandgap_write_counter() - set the bandgap sensor counter
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @interval: desired update interval in miliseconds
+ */
+static void ti_bandgap_write_counter(struct ti_bandgap *bgp, int id,
+ u32 interval)
+{
+ interval = interval * bgp->clk_rate / 1000;
+ spin_lock(&bgp->lock);
+ RMW_BITS(bgp, id, bgap_counter, counter_mask, interval);
+ spin_unlock(&bgp->lock);
+}
+
+/**
+ * ti_bandgap_write_update_interval() - set the update interval
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @interval: desired update interval in miliseconds
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_write_update_interval(struct ti_bandgap *bgp,
+ int id, u32 interval)
+{
+ int ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ goto exit;
+
+ if (!TI_BANDGAP_HAS(bgp, COUNTER) &&
+ !TI_BANDGAP_HAS(bgp, COUNTER_DELAY)) {
+ ret = -ENOTSUPP;
+ goto exit;
+ }
+
+ if (TI_BANDGAP_HAS(bgp, COUNTER)) {
+ ti_bandgap_write_counter(bgp, id, interval);
+ goto exit;
+ }
+
+ ret = ti_bandgap_write_counter_delay(bgp, id, interval);
+exit:
+ return ret;
+}
+
+/**
+ * ti_bandgap_read_temperature() - report current temperature
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @temperature: resulting temperature
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id,
+ int *temperature)
+{
+ u32 temp;
+ int ret;
+
+ ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ return ret;
+
+ spin_lock(&bgp->lock);
+ temp = ti_bandgap_read_temp(bgp, id);
+ spin_unlock(&bgp->lock);
+
+ ret |= ti_bandgap_adc_to_mcelsius(bgp, temp, &temp);
+ if (ret)
+ return -EIO;
+
+ *temperature = temp;
+
+ return 0;
+}
+
+/**
+ * ti_bandgap_set_sensor_data() - helper function to store thermal
+ * framework related data.
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ * @data: thermal framework related data to be stored
+ *
+ * Return: 0 on success or the proper error code
+ */
+int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data)
+{
+ int ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ return ret;
+
+ bgp->regval[id].data = data;
+
+ return 0;
+}
+
+/**
+ * ti_bandgap_get_sensor_data() - helper function to get thermal
+ * framework related data.
+ * @bgp: pointer to bandgap instance
+ * @id: sensor id
+ *
+ * Return: data stored by set function with sensor id on success or NULL
+ */
+void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id)
+{
+ int ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return bgp->regval[id].data;
+}
+
+/*** Helper functions used during device initialization ***/
+
+/**
+ * ti_bandgap_force_single_read() - executes 1 single ADC conversion
+ * @bgp: pointer to struct ti_bandgap
+ * @id: sensor id which it is desired to read 1 temperature
+ *
+ * Used to initialize the conversion state machine and set it to a valid
+ * state. Called during device initialization and context restore events.
+ *
+ * Return: 0
+ */
+static int
+ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id)
+{
+ u32 temp = 0, counter = 1000;
+
+ /* Select single conversion mode */
+ if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
+ RMW_BITS(bgp, id, bgap_mode_ctrl, mode_ctrl_mask, 0);
+
+ /* Start of Conversion = 1 */
+ RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 1);
+ /* Wait until DTEMP is updated */
+ temp = ti_bandgap_read_temp(bgp, id);
+
+ while ((temp == 0) && --counter)
+ temp = ti_bandgap_read_temp(bgp, id);
+ /* REVISIT: Check correct condition for end of conversion */
+
+ /* Start of Conversion = 0 */
+ RMW_BITS(bgp, id, temp_sensor_ctrl, bgap_soc_mask, 0);
+
+ return 0;
+}
+
+/**
+ * ti_bandgap_set_continous_mode() - One time enabling of continuous mode
+ * @bgp: pointer to struct ti_bandgap
+ *
+ * Call this function only if HAS(MODE_CONFIG) is set. As this driver may
+ * be used for junction temperature monitoring, it is desirable that the
+ * sensors are operational all the time, so that alerts are generated
+ * properly.
+ *
+ * Return: 0
+ */
+static int ti_bandgap_set_continuous_mode(struct ti_bandgap *bgp)
+{
+ int i;
+
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ /* Perform a single read just before enabling continuous */
+ ti_bandgap_force_single_read(bgp, i);
+ RMW_BITS(bgp, i, bgap_mode_ctrl, mode_ctrl_mask, 1);
+ }
+
+ return 0;
+}
+
+/**
+ * ti_bandgap_get_trend() - To fetch the temperature trend of a sensor
+ * @bgp: pointer to struct ti_bandgap
+ * @id: id of the individual sensor
+ * @trend: Pointer to trend.
+ *
+ * This function needs to be called to fetch the temperature trend of a
+ * Particular sensor. The function computes the difference in temperature
+ * w.r.t time. For the bandgaps with built in history buffer the temperatures
+ * are read from the buffer and for those without the Buffer -ENOTSUPP is
+ * returned.
+ *
+ * Return: 0 if no error, else return corresponding error. If no
+ * error then the trend value is passed on to trend parameter
+ */
+int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend)
+{
+ struct temp_sensor_registers *tsr;
+ u32 temp1, temp2, reg1, reg2;
+ int t1, t2, interval, ret = 0;
+
+ ret = ti_bandgap_validate(bgp, id);
+ if (ret)
+ goto exit;
+
+ if (!TI_BANDGAP_HAS(bgp, HISTORY_BUFFER) ||
+ !TI_BANDGAP_HAS(bgp, FREEZE_BIT)) {
+ ret = -ENOTSUPP;
+ goto exit;
+ }
+
+ tsr = bgp->conf->sensors[id].registers;
+
+ /* Freeze and read the last 2 valid readings */
+ reg1 = tsr->ctrl_dtemp_1;
+ reg2 = tsr->ctrl_dtemp_2;
+
+ /* read temperature from history buffer */
+ temp1 = ti_bandgap_readl(bgp, reg1);
+ temp1 &= tsr->bgap_dtemp_mask;
+
+ temp2 = ti_bandgap_readl(bgp, reg2);
+ temp2 &= tsr->bgap_dtemp_mask;
+
+ /* Convert from adc values to mCelsius temperature */
+ ret = ti_bandgap_adc_to_mcelsius(bgp, temp1, &t1);
+ if (ret)
+ goto exit;
+
+ ret = ti_bandgap_adc_to_mcelsius(bgp, temp2, &t2);
+ if (ret)
+ goto exit;
+
+ /* Fetch the update interval */
+ ret = ti_bandgap_read_update_interval(bgp, id, &interval);
+ if (ret || !interval)
+ goto exit;
+
+ *trend = (t1 - t2) / interval;
+
+ dev_dbg(bgp->dev, "The temperatures are t1 = %d and t2 = %d and trend =%d\n",
+ t1, t2, *trend);
+
+exit:
+ return ret;
+}
+
+/**
+ * ti_bandgap_tshut_init() - setup and initialize tshut handling
+ * @bgp: pointer to struct ti_bandgap
+ * @pdev: pointer to device struct platform_device
+ *
+ * Call this function only in case the bandgap features HAS(TSHUT).
+ * In this case, the driver needs to handle the TSHUT signal as an IRQ.
+ * The IRQ is wired as a GPIO, and for this purpose, it is required
+ * to specify which GPIO line is used. TSHUT IRQ is fired anytime
+ * one of the bandgap sensors violates the TSHUT high/hot threshold.
+ * And in that case, the system must go off.
+ *
+ * Return: 0 if no error, else error status
+ */
+static int ti_bandgap_tshut_init(struct ti_bandgap *bgp,
+ struct platform_device *pdev)
+{
+ int gpio_nr = bgp->tshut_gpio;
+ int status;
+
+ /* Request for gpio_86 line */
+ status = gpio_request(gpio_nr, "tshut");
+ if (status < 0) {
+ dev_err(bgp->dev, "Could not request for TSHUT GPIO:%i\n", 86);
+ return status;
+ }
+ status = gpio_direction_input(gpio_nr);
+ if (status) {
+ dev_err(bgp->dev, "Cannot set input TSHUT GPIO %d\n", gpio_nr);
+ return status;
+ }
+
+ status = request_irq(gpio_to_irq(gpio_nr), ti_bandgap_tshut_irq_handler,
+ IRQF_TRIGGER_RISING, "tshut", NULL);
+ if (status) {
+ gpio_free(gpio_nr);
+ dev_err(bgp->dev, "request irq failed for TSHUT");
+ }
+
+ return 0;
+}
+
+/**
+ * ti_bandgap_alert_init() - setup and initialize talert handling
+ * @bgp: pointer to struct ti_bandgap
+ * @pdev: pointer to device struct platform_device
+ *
+ * Call this function only in case the bandgap features HAS(TALERT).
+ * In this case, the driver needs to handle the TALERT signals as an IRQs.
+ * TALERT is a normal IRQ and it is fired any time thresholds (hot or cold)
+ * are violated. In these situation, the driver must reprogram the thresholds,
+ * accordingly to specified policy.
+ *
+ * Return: 0 if no error, else return corresponding error.
+ */
+static int ti_bandgap_talert_init(struct ti_bandgap *bgp,
+ struct platform_device *pdev)
+{
+ int ret;
+
+ bgp->irq = platform_get_irq(pdev, 0);
+ if (bgp->irq < 0) {
+ dev_err(&pdev->dev, "get_irq failed\n");
+ return bgp->irq;
+ }
+ ret = request_threaded_irq(bgp->irq, NULL,
+ ti_bandgap_talert_irq_handler,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "talert", bgp);
+ if (ret) {
+ dev_err(&pdev->dev, "Request threaded irq failed.\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct of_device_id of_ti_bandgap_match[];
+/**
+ * ti_bandgap_build() - parse DT and setup a struct ti_bandgap
+ * @pdev: pointer to device struct platform_device
+ *
+ * Used to read the device tree properties accordingly to the bandgap
+ * matching version. Based on bandgap version and its capabilities it
+ * will build a struct ti_bandgap out of the required DT entries.
+ *
+ * Return: valid bandgap structure if successful, else returns ERR_PTR
+ * return value must be verified with IS_ERR.
+ */
+static struct ti_bandgap *ti_bandgap_build(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ const struct of_device_id *of_id;
+ struct ti_bandgap *bgp;
+ struct resource *res;
+ u32 prop;
+ int i;
+
+ /* just for the sake */
+ if (!node) {
+ dev_err(&pdev->dev, "no platform information available\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ bgp = devm_kzalloc(&pdev->dev, sizeof(*bgp), GFP_KERNEL);
+ if (!bgp) {
+ dev_err(&pdev->dev, "Unable to allocate mem for driver ref\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ of_id = of_match_device(of_ti_bandgap_match, &pdev->dev);
+ if (of_id)
+ bgp->conf = of_id->data;
+
+ /* register shadow for context save and restore */
+ bgp->regval = devm_kzalloc(&pdev->dev, sizeof(*bgp->regval) *
+ bgp->conf->sensor_count, GFP_KERNEL);
+ if (!bgp) {
+ dev_err(&pdev->dev, "Unable to allocate mem for driver ref\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ i = 0;
+ do {
+ void __iomem *chunk;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, i);
+ if (!res)
+ break;
+ chunk = devm_ioremap_resource(&pdev->dev, res);
+ if (i == 0)
+ bgp->base = chunk;
+ if (IS_ERR(chunk))
+ return ERR_CAST(chunk);
+
+ i++;
+ } while (res);
+
+ if (TI_BANDGAP_HAS(bgp, TSHUT)) {
+ if (of_property_read_u32(node, "ti,tshut-gpio", &prop) < 0) {
+ dev_err(&pdev->dev, "missing tshut gpio in device tree\n");
+ return ERR_PTR(-EINVAL);
+ }
+ bgp->tshut_gpio = prop;
+ if (!gpio_is_valid(bgp->tshut_gpio)) {
+ dev_err(&pdev->dev, "invalid gpio for tshut (%d)\n",
+ bgp->tshut_gpio);
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ return bgp;
+}
+
+/*** Device driver call backs ***/
+
+static
+int ti_bandgap_probe(struct platform_device *pdev)
+{
+ struct ti_bandgap *bgp;
+ int clk_rate, ret = 0, i;
+
+ bgp = ti_bandgap_build(pdev);
+ if (IS_ERR_OR_NULL(bgp)) {
+ dev_err(&pdev->dev, "failed to fetch platform data\n");
+ return PTR_ERR(bgp);
+ }
+ bgp->dev = &pdev->dev;
+
+ if (TI_BANDGAP_HAS(bgp, TSHUT)) {
+ ret = ti_bandgap_tshut_init(bgp, pdev);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed to initialize system tshut IRQ\n");
+ return ret;
+ }
+ }
+
+ bgp->fclock = clk_get(NULL, bgp->conf->fclock_name);
+ ret = IS_ERR_OR_NULL(bgp->fclock);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request fclock reference\n");
+ goto free_irqs;
+ }
+
+ bgp->div_clk = clk_get(NULL, bgp->conf->div_ck_name);
+ ret = IS_ERR_OR_NULL(bgp->div_clk);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed to request div_ts_ck clock ref\n");
+ goto free_irqs;
+ }
+
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ struct temp_sensor_registers *tsr;
+ u32 val;
+
+ tsr = bgp->conf->sensors[i].registers;
+ /*
+ * check if the efuse has a non-zero value if not
+ * it is an untrimmed sample and the temperatures
+ * may not be accurate
+ */
+ val = ti_bandgap_readl(bgp, tsr->bgap_efuse);
+ if (ret || !val)
+ dev_info(&pdev->dev,
+ "Non-trimmed BGAP, Temp not accurate\n");
+ }
+
+ clk_rate = clk_round_rate(bgp->div_clk,
+ bgp->conf->sensors[0].ts_data->max_freq);
+ if (clk_rate < bgp->conf->sensors[0].ts_data->min_freq ||
+ clk_rate == 0xffffffff) {
+ ret = -ENODEV;
+ dev_err(&pdev->dev, "wrong clock rate (%d)\n", clk_rate);
+ goto put_clks;
+ }
+
+ ret = clk_set_rate(bgp->div_clk, clk_rate);
+ if (ret)
+ dev_err(&pdev->dev, "Cannot re-set clock rate. Continuing\n");
+
+ bgp->clk_rate = clk_rate;
+ if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
+ clk_prepare_enable(bgp->fclock);
+
+
+ spin_lock_init(&bgp->lock);
+ bgp->dev = &pdev->dev;
+ platform_set_drvdata(pdev, bgp);
+
+ ti_bandgap_power(bgp, true);
+
+ /* Set default counter to 1 for now */
+ if (TI_BANDGAP_HAS(bgp, COUNTER))
+ for (i = 0; i < bgp->conf->sensor_count; i++)
+ RMW_BITS(bgp, i, bgap_counter, counter_mask, 1);
+
+ /* Set default thresholds for alert and shutdown */
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ struct temp_sensor_data *ts_data;
+
+ ts_data = bgp->conf->sensors[i].ts_data;
+
+ if (TI_BANDGAP_HAS(bgp, TALERT)) {
+ /* Set initial Talert thresholds */
+ RMW_BITS(bgp, i, bgap_threshold,
+ threshold_tcold_mask, ts_data->t_cold);
+ RMW_BITS(bgp, i, bgap_threshold,
+ threshold_thot_mask, ts_data->t_hot);
+ /* Enable the alert events */
+ RMW_BITS(bgp, i, bgap_mask_ctrl, mask_hot_mask, 1);
+ RMW_BITS(bgp, i, bgap_mask_ctrl, mask_cold_mask, 1);
+ }
+
+ if (TI_BANDGAP_HAS(bgp, TSHUT_CONFIG)) {
+ /* Set initial Tshut thresholds */
+ RMW_BITS(bgp, i, tshut_threshold,
+ tshut_hot_mask, ts_data->tshut_hot);
+ RMW_BITS(bgp, i, tshut_threshold,
+ tshut_cold_mask, ts_data->tshut_cold);
+ }
+ }
+
+ if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
+ ti_bandgap_set_continuous_mode(bgp);
+
+ /* Set .250 seconds time as default counter */
+ if (TI_BANDGAP_HAS(bgp, COUNTER))
+ for (i = 0; i < bgp->conf->sensor_count; i++)
+ RMW_BITS(bgp, i, bgap_counter, counter_mask,
+ bgp->clk_rate / 4);
+
+ /* Every thing is good? Then expose the sensors */
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ char *domain;
+
+ if (bgp->conf->sensors[i].register_cooling) {
+ ret = bgp->conf->sensors[i].register_cooling(bgp, i);
+ if (ret)
+ goto remove_sensors;
+ }
+
+ if (bgp->conf->expose_sensor) {
+ domain = bgp->conf->sensors[i].domain;
+ ret = bgp->conf->expose_sensor(bgp, i, domain);
+ if (ret)
+ goto remove_last_cooling;
+ }
+ }
+
+ /*
+ * Enable the Interrupts once everything is set. Otherwise irq handler
+ * might be called as soon as it is enabled where as rest of framework
+ * is still getting initialised.
+ */
+ if (TI_BANDGAP_HAS(bgp, TALERT)) {
+ ret = ti_bandgap_talert_init(bgp, pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize Talert IRQ\n");
+ i = bgp->conf->sensor_count;
+ goto disable_clk;
+ }
+ }
+
+ return 0;
+
+remove_last_cooling:
+ if (bgp->conf->sensors[i].unregister_cooling)
+ bgp->conf->sensors[i].unregister_cooling(bgp, i);
+remove_sensors:
+ for (i--; i >= 0; i--) {
+ if (bgp->conf->sensors[i].unregister_cooling)
+ bgp->conf->sensors[i].unregister_cooling(bgp, i);
+ if (bgp->conf->remove_sensor)
+ bgp->conf->remove_sensor(bgp, i);
+ }
+ ti_bandgap_power(bgp, false);
+disable_clk:
+ if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
+ clk_disable_unprepare(bgp->fclock);
+put_clks:
+ clk_put(bgp->fclock);
+ clk_put(bgp->div_clk);
+free_irqs:
+ if (TI_BANDGAP_HAS(bgp, TSHUT)) {
+ free_irq(gpio_to_irq(bgp->tshut_gpio), NULL);
+ gpio_free(bgp->tshut_gpio);
+ }
+
+ return ret;
+}
+
+static
+int ti_bandgap_remove(struct platform_device *pdev)
+{
+ struct ti_bandgap *bgp = platform_get_drvdata(pdev);
+ int i;
+
+ /* First thing is to remove sensor interfaces */
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ if (bgp->conf->sensors[i].unregister_cooling)
+ bgp->conf->sensors[i].unregister_cooling(bgp, i);
+
+ if (bgp->conf->remove_sensor)
+ bgp->conf->remove_sensor(bgp, i);
+ }
+
+ ti_bandgap_power(bgp, false);
+
+ if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
+ clk_disable_unprepare(bgp->fclock);
+ clk_put(bgp->fclock);
+ clk_put(bgp->div_clk);
+
+ if (TI_BANDGAP_HAS(bgp, TALERT))
+ free_irq(bgp->irq, bgp);
+
+ if (TI_BANDGAP_HAS(bgp, TSHUT)) {
+ free_irq(gpio_to_irq(bgp->tshut_gpio), NULL);
+ gpio_free(bgp->tshut_gpio);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int ti_bandgap_save_ctxt(struct ti_bandgap *bgp)
+{
+ int i;
+
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ struct temp_sensor_registers *tsr;
+ struct temp_sensor_regval *rval;
+
+ rval = &bgp->regval[i];
+ tsr = bgp->conf->sensors[i].registers;
+
+ if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
+ rval->bg_mode_ctrl = ti_bandgap_readl(bgp,
+ tsr->bgap_mode_ctrl);
+ if (TI_BANDGAP_HAS(bgp, COUNTER))
+ rval->bg_counter = ti_bandgap_readl(bgp,
+ tsr->bgap_counter);
+ if (TI_BANDGAP_HAS(bgp, TALERT)) {
+ rval->bg_threshold = ti_bandgap_readl(bgp,
+ tsr->bgap_threshold);
+ rval->bg_ctrl = ti_bandgap_readl(bgp,
+ tsr->bgap_mask_ctrl);
+ }
+
+ if (TI_BANDGAP_HAS(bgp, TSHUT_CONFIG))
+ rval->tshut_threshold = ti_bandgap_readl(bgp,
+ tsr->tshut_threshold);
+ }
+
+ return 0;
+}
+
+static int ti_bandgap_restore_ctxt(struct ti_bandgap *bgp)
+{
+ int i;
+
+ for (i = 0; i < bgp->conf->sensor_count; i++) {
+ struct temp_sensor_registers *tsr;
+ struct temp_sensor_regval *rval;
+ u32 val = 0;
+
+ rval = &bgp->regval[i];
+ tsr = bgp->conf->sensors[i].registers;
+
+ if (TI_BANDGAP_HAS(bgp, COUNTER))
+ val = ti_bandgap_readl(bgp, tsr->bgap_counter);
+
+ if (TI_BANDGAP_HAS(bgp, TSHUT_CONFIG))
+ ti_bandgap_writel(bgp, rval->tshut_threshold,
+ tsr->tshut_threshold);
+ /* Force immediate temperature measurement and update
+ * of the DTEMP field
+ */
+ ti_bandgap_force_single_read(bgp, i);
+
+ if (TI_BANDGAP_HAS(bgp, COUNTER))
+ ti_bandgap_writel(bgp, rval->bg_counter,
+ tsr->bgap_counter);
+ if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
+ ti_bandgap_writel(bgp, rval->bg_mode_ctrl,
+ tsr->bgap_mode_ctrl);
+ if (TI_BANDGAP_HAS(bgp, TALERT)) {
+ ti_bandgap_writel(bgp, rval->bg_threshold,
+ tsr->bgap_threshold);
+ ti_bandgap_writel(bgp, rval->bg_ctrl,
+ tsr->bgap_mask_ctrl);
+ }
+ }
+
+ return 0;
+}
+
+static int ti_bandgap_suspend(struct device *dev)
+{
+ struct ti_bandgap *bgp = dev_get_drvdata(dev);
+ int err;
+
+ err = ti_bandgap_save_ctxt(bgp);
+ ti_bandgap_power(bgp, false);
+
+ if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
+ clk_disable_unprepare(bgp->fclock);
+
+ return err;
+}
+
+static int ti_bandgap_resume(struct device *dev)
+{
+ struct ti_bandgap *bgp = dev_get_drvdata(dev);
+
+ if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
+ clk_prepare_enable(bgp->fclock);
+
+ ti_bandgap_power(bgp, true);
+
+ return ti_bandgap_restore_ctxt(bgp);
+}
+static const struct dev_pm_ops ti_bandgap_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(ti_bandgap_suspend,
+ ti_bandgap_resume)
+};
+
+#define DEV_PM_OPS (&ti_bandgap_dev_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif
+
+static const struct of_device_id of_ti_bandgap_match[] = {
+#ifdef CONFIG_OMAP4_THERMAL
+ {
+ .compatible = "ti,omap4430-bandgap",
+ .data = (void *)&omap4430_data,
+ },
+ {
+ .compatible = "ti,omap4460-bandgap",
+ .data = (void *)&omap4460_data,
+ },
+ {
+ .compatible = "ti,omap4470-bandgap",
+ .data = (void *)&omap4470_data,
+ },
+#endif
+#ifdef CONFIG_OMAP5_THERMAL
+ {
+ .compatible = "ti,omap5430-bandgap",
+ .data = (void *)&omap5430_data,
+ },
+#endif
+ /* Sentinel */
+ { },
+};
+MODULE_DEVICE_TABLE(of, of_ti_bandgap_match);
+
+static struct platform_driver ti_bandgap_sensor_driver = {
+ .probe = ti_bandgap_probe,
+ .remove = ti_bandgap_remove,
+ .driver = {
+ .name = "ti-soc-thermal",
+ .pm = DEV_PM_OPS,
+ .of_match_table = of_ti_bandgap_match,
+ },
+};
+
+module_platform_driver(ti_bandgap_sensor_driver);
+
+MODULE_DESCRIPTION("OMAP4+ bandgap temperature sensor driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:ti-soc-thermal");
+MODULE_AUTHOR("Texas Instrument Inc.");
--- /dev/null
+/*
+ * OMAP4 Bandgap temperature sensor driver
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ * Contact:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+#ifndef __TI_BANDGAP_H
+#define __TI_BANDGAP_H
+
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/err.h>
+
+/**
+ * DOC: bandgap driver data structure
+ * ==================================
+ *
+ * +----------+----------------+
+ * | struct temp_sensor_regval |
+ * +---------------------------+
+ * * (Array of)
+ * |
+ * |
+ * +-------------------+ +-----------------+
+ * | struct ti_bandgap |-->| struct device * |
+ * +----------+--------+ +-----------------+
+ * |
+ * |
+ * V
+ * +------------------------+
+ * | struct ti_bandgap_data |
+ * +------------------------+
+ * |
+ * |
+ * * (Array of)
+ * +------------+------------------------------------------------------+
+ * | +----------+------------+ +-------------------------+ |
+ * | | struct ti_temp_sensor |-->| struct temp_sensor_data | |
+ * | +-----------------------+ +------------+------------+ |
+ * | | |
+ * | + |
+ * | V |
+ * | +----------+-------------------+ |
+ * | | struct temp_sensor_registers | |
+ * | +------------------------------+ |
+ * | |
+ * +-------------------------------------------------------------------+
+ *
+ * Above is a simple diagram describing how the data structure below
+ * are organized. For each bandgap device there should be a ti_bandgap_data
+ * containing the device instance configuration, as well as, an array of
+ * sensors, representing every sensor instance present in this bandgap.
+ */
+
+/**
+ * struct temp_sensor_registers - descriptor to access registers and bitfields
+ * @temp_sensor_ctrl: TEMP_SENSOR_CTRL register offset
+ * @bgap_tempsoff_mask: mask to temp_sensor_ctrl.tempsoff
+ * @bgap_soc_mask: mask to temp_sensor_ctrl.soc
+ * @bgap_eocz_mask: mask to temp_sensor_ctrl.eocz
+ * @bgap_dtemp_mask: mask to temp_sensor_ctrl.dtemp
+ * @bgap_mask_ctrl: BANDGAP_MASK_CTRL register offset
+ * @mask_hot_mask: mask to bandgap_mask_ctrl.mask_hot
+ * @mask_cold_mask: mask to bandgap_mask_ctrl.mask_cold
+ * @mask_sidlemode_mask: mask to bandgap_mask_ctrl.mask_sidlemode
+ * @mask_counter_delay_mask: mask to bandgap_mask_ctrl.mask_counter_delay
+ * @mask_freeze_mask: mask to bandgap_mask_ctrl.mask_free
+ * @mask_clear_mask: mask to bandgap_mask_ctrl.mask_clear
+ * @mask_clear_accum_mask: mask to bandgap_mask_ctrl.mask_clear_accum
+ * @bgap_mode_ctrl: BANDGAP_MODE_CTRL register offset
+ * @mode_ctrl_mask: mask to bandgap_mode_ctrl.mode_ctrl
+ * @bgap_counter: BANDGAP_COUNTER register offset
+ * @counter_mask: mask to bandgap_counter.counter
+ * @bgap_threshold: BANDGAP_THRESHOLD register offset (TALERT thresholds)
+ * @threshold_thot_mask: mask to bandgap_threhold.thot
+ * @threshold_tcold_mask: mask to bandgap_threhold.tcold
+ * @tshut_threshold: TSHUT_THRESHOLD register offset (TSHUT thresholds)
+ * @tshut_efuse_mask: mask to tshut_threshold.tshut_efuse
+ * @tshut_efuse_shift: shift to tshut_threshold.tshut_efuse
+ * @tshut_hot_mask: mask to tshut_threhold.thot
+ * @tshut_cold_mask: mask to tshut_threhold.thot
+ * @bgap_status: BANDGAP_STATUS register offset
+ * @status_clean_stop_mask: mask to bandgap_status.clean_stop
+ * @status_bgap_alert_mask: mask to bandgap_status.bandgap_alert
+ * @status_hot_mask: mask to bandgap_status.hot
+ * @status_cold_mask: mask to bandgap_status.cold
+ * @bgap_cumul_dtemp: BANDGAP_CUMUL_DTEMP register offset
+ * @ctrl_dtemp_0: CTRL_DTEMP0 register offset
+ * @ctrl_dtemp_1: CTRL_DTEMP1 register offset
+ * @ctrl_dtemp_2: CTRL_DTEMP2 register offset
+ * @ctrl_dtemp_3: CTRL_DTEMP3 register offset
+ * @ctrl_dtemp_4: CTRL_DTEMP4 register offset
+ * @bgap_efuse: BANDGAP_EFUSE register offset
+ *
+ * The register offsets and bitfields might change across
+ * OMAP and variants versions. Hence this struct serves as a
+ * descriptor map on how to access the registers and the bitfields.
+ *
+ * This descriptor contains registers of all versions of bandgap chips.
+ * Not all versions will use all registers, depending on the available
+ * features. Please read TRMs for descriptive explanation on each bitfield.
+ */
+
+struct temp_sensor_registers {
+ u32 temp_sensor_ctrl;
+ u32 bgap_tempsoff_mask;
+ u32 bgap_soc_mask;
+ u32 bgap_eocz_mask; /* not used: but needs revisit */
+ u32 bgap_dtemp_mask;
+
+ u32 bgap_mask_ctrl;
+ u32 mask_hot_mask;
+ u32 mask_cold_mask;
+ u32 mask_sidlemode_mask; /* not used: but may be needed for pm */
+ u32 mask_counter_delay_mask;
+ u32 mask_freeze_mask;
+ u32 mask_clear_mask; /* not used: but needed for trending */
+ u32 mask_clear_accum_mask; /* not used: but needed for trending */
+
+ u32 bgap_mode_ctrl;
+ u32 mode_ctrl_mask;
+
+ u32 bgap_counter;
+ u32 counter_mask;
+
+ u32 bgap_threshold;
+ u32 threshold_thot_mask;
+ u32 threshold_tcold_mask;
+
+ u32 tshut_threshold;
+ u32 tshut_efuse_mask; /* not used */
+ u32 tshut_efuse_shift; /* not used */
+ u32 tshut_hot_mask;
+ u32 tshut_cold_mask;
+
+ u32 bgap_status;
+ u32 status_clean_stop_mask; /* not used: but needed for trending */
+ u32 status_bgap_alert_mask; /* not used */
+ u32 status_hot_mask;
+ u32 status_cold_mask;
+
+ u32 bgap_cumul_dtemp; /* not used: but needed for trending */
+ u32 ctrl_dtemp_0; /* not used: but needed for trending */
+ u32 ctrl_dtemp_1; /* not used: but needed for trending */
+ u32 ctrl_dtemp_2; /* not used: but needed for trending */
+ u32 ctrl_dtemp_3; /* not used: but needed for trending */
+ u32 ctrl_dtemp_4; /* not used: but needed for trending */
+ u32 bgap_efuse;
+};
+
+/**
+ * struct temp_sensor_data - The thresholds and limits for temperature sensors.
+ * @tshut_hot: temperature to trigger a thermal reset (initial value)
+ * @tshut_cold: temp to get the plat out of reset due to thermal (init val)
+ * @t_hot: temperature to trigger a thermal alert (high initial value)
+ * @t_cold: temperature to trigger a thermal alert (low initial value)
+ * @min_freq: sensor minimum clock rate
+ * @max_freq: sensor maximum clock rate
+ * @max_temp: sensor maximum temperature
+ * @min_temp: sensor minimum temperature
+ * @hyst_val: temperature hysteresis considered while converting ADC values
+ * @update_int1: update interval
+ * @update_int2: update interval
+ *
+ * This data structure will hold the required thresholds and temperature limits
+ * for a specific temperature sensor, like shutdown temperature, alert
+ * temperature, clock / rate used, ADC conversion limits and update intervals
+ */
+struct temp_sensor_data {
+ u32 tshut_hot;
+ u32 tshut_cold;
+ u32 t_hot;
+ u32 t_cold;
+ u32 min_freq;
+ u32 max_freq;
+ int max_temp;
+ int min_temp;
+ int hyst_val;
+ u32 update_int1; /* not used */
+ u32 update_int2; /* not used */
+};
+
+struct ti_bandgap_data;
+
+/**
+ * struct temp_sensor_regval - temperature sensor register values and priv data
+ * @bg_mode_ctrl: temp sensor control register value
+ * @bg_ctrl: bandgap ctrl register value
+ * @bg_counter: bandgap counter value
+ * @bg_threshold: bandgap threshold register value
+ * @tshut_threshold: bandgap tshut register value
+ * @data: private data
+ *
+ * Data structure to save and restore bandgap register set context. Only
+ * required registers are shadowed, when needed.
+ */
+struct temp_sensor_regval {
+ u32 bg_mode_ctrl;
+ u32 bg_ctrl;
+ u32 bg_counter;
+ u32 bg_threshold;
+ u32 tshut_threshold;
+ void *data;
+};
+
+/**
+ * struct ti_bandgap - bandgap device structure
+ * @dev: struct device pointer
+ * @base: io memory base address
+ * @conf: struct with bandgap configuration set (# sensors, conv_table, etc)
+ * @regval: temperature sensor register values
+ * @fclock: pointer to functional clock of temperature sensor
+ * @div_clk: pointer to divider clock of temperature sensor fclk
+ * @lock: spinlock for ti_bandgap structure
+ * @irq: MPU IRQ number for thermal alert
+ * @tshut_gpio: GPIO where Tshut signal is routed
+ * @clk_rate: Holds current clock rate
+ *
+ * The bandgap device structure representing the bandgap device instance.
+ * It holds most of the dynamic stuff. Configurations and sensor specific
+ * entries are inside the @conf structure.
+ */
+struct ti_bandgap {
+ struct device *dev;
+ void __iomem *base;
+ const struct ti_bandgap_data *conf;
+ struct temp_sensor_regval *regval;
+ struct clk *fclock;
+ struct clk *div_clk;
+ spinlock_t lock; /* shields this struct */
+ int irq;
+ int tshut_gpio;
+ u32 clk_rate;
+};
+
+/**
+ * struct ti_temp_sensor - bandgap temperature sensor configuration data
+ * @ts_data: pointer to struct with thresholds, limits of temperature sensor
+ * @registers: pointer to the list of register offsets and bitfields
+ * @domain: the name of the domain where the sensor is located
+ * @slope: sensor gradient slope info for hotspot extrapolation equation
+ * @constant: sensor gradient const info for hotspot extrapolation equation
+ * @slope_pcb: sensor gradient slope info for hotspot extrapolation equation
+ * with no external influence
+ * @constant_pcb: sensor gradient const info for hotspot extrapolation equation
+ * with no external influence
+ * @register_cooling: function to describe how this sensor is going to be cooled
+ * @unregister_cooling: function to release cooling data
+ *
+ * Data structure to describe a temperature sensor handled by a bandgap device.
+ * It should provide configuration details on this sensor, such as how to
+ * access the registers affecting this sensor, shadow register buffer, how to
+ * assess the gradient from hotspot, how to cooldown the domain when sensor
+ * reports too hot temperature.
+ */
+struct ti_temp_sensor {
+ struct temp_sensor_data *ts_data;
+ struct temp_sensor_registers *registers;
+ char *domain;
+ /* for hotspot extrapolation */
+ const int slope;
+ const int constant;
+ const int slope_pcb;
+ const int constant_pcb;
+ int (*register_cooling)(struct ti_bandgap *bgp, int id);
+ int (*unregister_cooling)(struct ti_bandgap *bgp, int id);
+};
+
+/**
+ * DOC: ti bandgap feature types
+ *
+ * TI_BANDGAP_FEATURE_TSHUT - used when the thermal shutdown signal output
+ * of a bandgap device instance is routed to the processor. This means
+ * the system must react and perform the shutdown by itself (handle an
+ * IRQ, for instance).
+ *
+ * TI_BANDGAP_FEATURE_TSHUT_CONFIG - used when the bandgap device has control
+ * over the thermal shutdown configuration. This means that the thermal
+ * shutdown thresholds are programmable, for instance.
+ *
+ * TI_BANDGAP_FEATURE_TALERT - used when the bandgap device instance outputs
+ * a signal representing violation of programmable alert thresholds.
+ *
+ * TI_BANDGAP_FEATURE_MODE_CONFIG - used when it is possible to choose which
+ * mode, continuous or one shot, the bandgap device instance will operate.
+ *
+ * TI_BANDGAP_FEATURE_COUNTER - used when the bandgap device instance allows
+ * programming the update interval of its internal state machine.
+ *
+ * TI_BANDGAP_FEATURE_POWER_SWITCH - used when the bandgap device allows
+ * itself to be switched on/off.
+ *
+ * TI_BANDGAP_FEATURE_CLK_CTRL - used when the clocks feeding the bandgap
+ * device are gateable or not.
+ *
+ * TI_BANDGAP_FEATURE_FREEZE_BIT - used when the bandgap device features
+ * a history buffer that its update can be freezed/unfreezed.
+ *
+ * TI_BANDGAP_FEATURE_COUNTER_DELAY - used when the bandgap device features
+ * a delay programming based on distinct values.
+ *
+ * TI_BANDGAP_FEATURE_HISTORY_BUFFER - used when the bandgap device features
+ * a history buffer of temperatures.
+ *
+ * TI_BANDGAP_HAS(b, f) - macro to check if a bandgap device is capable of a
+ * specific feature (above) or not. Return non-zero, if yes.
+ */
+#define TI_BANDGAP_FEATURE_TSHUT BIT(0)
+#define TI_BANDGAP_FEATURE_TSHUT_CONFIG BIT(1)
+#define TI_BANDGAP_FEATURE_TALERT BIT(2)
+#define TI_BANDGAP_FEATURE_MODE_CONFIG BIT(3)
+#define TI_BANDGAP_FEATURE_COUNTER BIT(4)
+#define TI_BANDGAP_FEATURE_POWER_SWITCH BIT(5)
+#define TI_BANDGAP_FEATURE_CLK_CTRL BIT(6)
+#define TI_BANDGAP_FEATURE_FREEZE_BIT BIT(7)
+#define TI_BANDGAP_FEATURE_COUNTER_DELAY BIT(8)
+#define TI_BANDGAP_FEATURE_HISTORY_BUFFER BIT(9)
+#define TI_BANDGAP_HAS(b, f) \
+ ((b)->conf->features & TI_BANDGAP_FEATURE_ ## f)
+
+/**
+ * struct ti_bandgap_data - ti bandgap data configuration structure
+ * @features: a bitwise flag set to describe the device features
+ * @conv_table: Pointer to ADC to temperature conversion table
+ * @adc_start_val: ADC conversion table starting value
+ * @adc_end_val: ADC conversion table ending value
+ * @fclock_name: clock name of the functional clock
+ * @div_ck_name: clock name of the clock divisor
+ * @sensor_count: count of temperature sensor within this bandgap device
+ * @report_temperature: callback to report thermal alert to thermal API
+ * @expose_sensor: callback to export sensor to thermal API
+ * @remove_sensor: callback to destroy sensor from thermal API
+ * @sensors: array of sensors present in this bandgap instance
+ *
+ * This is a data structure which should hold most of the static configuration
+ * of a bandgap device instance. It should describe which features this instance
+ * is capable of, the clock names to feed this device, the amount of sensors and
+ * their configuration representation, and how to export and unexport them to
+ * a thermal API.
+ */
+struct ti_bandgap_data {
+ unsigned int features;
+ const int *conv_table;
+ u32 adc_start_val;
+ u32 adc_end_val;
+ char *fclock_name;
+ char *div_ck_name;
+ int sensor_count;
+ int (*report_temperature)(struct ti_bandgap *bgp, int id);
+ int (*expose_sensor)(struct ti_bandgap *bgp, int id, char *domain);
+ int (*remove_sensor)(struct ti_bandgap *bgp, int id);
+
+ /* this needs to be at the end */
+ struct ti_temp_sensor sensors[];
+};
+
+int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot);
+int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val);
+int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold);
+int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val);
+int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id,
+ int *interval);
+int ti_bandgap_write_update_interval(struct ti_bandgap *bgp, int id,
+ u32 interval);
+int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id,
+ int *temperature);
+int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data);
+void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id);
+int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend);
+
+#ifdef CONFIG_OMAP4_THERMAL
+extern const struct ti_bandgap_data omap4430_data;
+extern const struct ti_bandgap_data omap4460_data;
+extern const struct ti_bandgap_data omap4470_data;
+#else
+#define omap4430_data NULL
+#define omap4460_data NULL
+#define omap4470_data NULL
+#endif
+
+#ifdef CONFIG_OMAP5_THERMAL
+extern const struct ti_bandgap_data omap5430_data;
+#else
+#define omap5430_data NULL
+#endif
+
+#endif
--- /dev/null
+/*
+ * OMAP thermal driver interface
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Contact:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/workqueue.h>
+#include <linux/thermal.h>
+#include <linux/cpufreq.h>
+#include <linux/cpumask.h>
+#include <linux/cpu_cooling.h>
+
+#include "ti-thermal.h"
+#include "ti-bandgap.h"
+
+/* common data structures */
+struct ti_thermal_data {
+ struct thermal_zone_device *ti_thermal;
+ struct thermal_cooling_device *cool_dev;
+ struct ti_bandgap *bgp;
+ enum thermal_device_mode mode;
+ struct work_struct thermal_wq;
+ int sensor_id;
+};
+
+static void ti_thermal_work(struct work_struct *work)
+{
+ struct ti_thermal_data *data = container_of(work,
+ struct ti_thermal_data, thermal_wq);
+
+ thermal_zone_device_update(data->ti_thermal);
+
+ dev_dbg(&data->ti_thermal->device, "updated thermal zone %s\n",
+ data->ti_thermal->type);
+}
+
+/**
+ * ti_thermal_hotspot_temperature - returns sensor extrapolated temperature
+ * @t: omap sensor temperature
+ * @s: omap sensor slope value
+ * @c: omap sensor const value
+ */
+static inline int ti_thermal_hotspot_temperature(int t, int s, int c)
+{
+ int delta = t * s / 1000 + c;
+
+ if (delta < 0)
+ delta = 0;
+
+ return t + delta;
+}
+
+/* thermal zone ops */
+/* Get temperature callback function for thermal zone*/
+static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
+ unsigned long *temp)
+{
+ struct ti_thermal_data *data = thermal->devdata;
+ struct ti_bandgap *bgp;
+ const struct ti_temp_sensor *s;
+ int ret, tmp, pcb_temp, slope, constant;
+
+ if (!data)
+ return 0;
+
+ bgp = data->bgp;
+ s = &bgp->conf->sensors[data->sensor_id];
+
+ ret = ti_bandgap_read_temperature(bgp, data->sensor_id, &tmp);
+ if (ret)
+ return ret;
+
+ pcb_temp = 0;
+ /* TODO: Introduce pcb temperature lookup */
+ /* In case pcb zone is available, use the extrapolation rule with it */
+ if (pcb_temp) {
+ tmp -= pcb_temp;
+ slope = s->slope_pcb;
+ constant = s->constant_pcb;
+ } else {
+ slope = s->slope;
+ constant = s->constant;
+ }
+ *temp = ti_thermal_hotspot_temperature(tmp, slope, constant);
+
+ return ret;
+}
+
+/* Bind callback functions for thermal zone */
+static int ti_thermal_bind(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ struct ti_thermal_data *data = thermal->devdata;
+ int id;
+
+ if (IS_ERR_OR_NULL(data))
+ return -ENODEV;
+
+ /* check if this is the cooling device we registered */
+ if (data->cool_dev != cdev)
+ return 0;
+
+ id = data->sensor_id;
+
+ /* Simple thing, two trips, one passive another critical */
+ return thermal_zone_bind_cooling_device(thermal, 0, cdev,
+ /* bind with min and max states defined by cpu_cooling */
+ THERMAL_NO_LIMIT,
+ THERMAL_NO_LIMIT);
+}
+
+/* Unbind callback functions for thermal zone */
+static int ti_thermal_unbind(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ struct ti_thermal_data *data = thermal->devdata;
+
+ if (IS_ERR_OR_NULL(data))
+ return -ENODEV;
+
+ /* check if this is the cooling device we registered */
+ if (data->cool_dev != cdev)
+ return 0;
+
+ /* Simple thing, two trips, one passive another critical */
+ return thermal_zone_unbind_cooling_device(thermal, 0, cdev);
+}
+
+/* Get mode callback functions for thermal zone */
+static int ti_thermal_get_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode *mode)
+{
+ struct ti_thermal_data *data = thermal->devdata;
+
+ if (data)
+ *mode = data->mode;
+
+ return 0;
+}
+
+/* Set mode callback functions for thermal zone */
+static int ti_thermal_set_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode mode)
+{
+ struct ti_thermal_data *data = thermal->devdata;
+
+ if (!data->ti_thermal) {
+ dev_notice(&thermal->device, "thermal zone not registered\n");
+ return 0;
+ }
+
+ mutex_lock(&data->ti_thermal->lock);
+
+ if (mode == THERMAL_DEVICE_ENABLED)
+ data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
+ else
+ data->ti_thermal->polling_delay = 0;
+
+ mutex_unlock(&data->ti_thermal->lock);
+
+ data->mode = mode;
+ thermal_zone_device_update(data->ti_thermal);
+ dev_dbg(&thermal->device, "thermal polling set for duration=%d msec\n",
+ data->ti_thermal->polling_delay);
+
+ return 0;
+}
+
+/* Get trip type callback functions for thermal zone */
+static int ti_thermal_get_trip_type(struct thermal_zone_device *thermal,
+ int trip, enum thermal_trip_type *type)
+{
+ if (!ti_thermal_is_valid_trip(trip))
+ return -EINVAL;
+
+ if (trip + 1 == OMAP_TRIP_NUMBER)
+ *type = THERMAL_TRIP_CRITICAL;
+ else
+ *type = THERMAL_TRIP_PASSIVE;
+
+ return 0;
+}
+
+/* Get trip temperature callback functions for thermal zone */
+static int ti_thermal_get_trip_temp(struct thermal_zone_device *thermal,
+ int trip, unsigned long *temp)
+{
+ if (!ti_thermal_is_valid_trip(trip))
+ return -EINVAL;
+
+ *temp = ti_thermal_get_trip_value(trip);
+
+ return 0;
+}
+
+/* Get the temperature trend callback functions for thermal zone */
+static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
+ int trip, enum thermal_trend *trend)
+{
+ struct ti_thermal_data *data = thermal->devdata;
+ struct ti_bandgap *bgp;
+ int id, tr, ret = 0;
+
+ bgp = data->bgp;
+ id = data->sensor_id;
+
+ ret = ti_bandgap_get_trend(bgp, id, &tr);
+ if (ret)
+ return ret;
+
+ if (tr > 0)
+ *trend = THERMAL_TREND_RAISING;
+ else if (tr < 0)
+ *trend = THERMAL_TREND_DROPPING;
+ else
+ *trend = THERMAL_TREND_STABLE;
+
+ return 0;
+}
+
+/* Get critical temperature callback functions for thermal zone */
+static int ti_thermal_get_crit_temp(struct thermal_zone_device *thermal,
+ unsigned long *temp)
+{
+ /* shutdown zone */
+ return ti_thermal_get_trip_temp(thermal, OMAP_TRIP_NUMBER - 1, temp);
+}
+
+static struct thermal_zone_device_ops ti_thermal_ops = {
+ .get_temp = ti_thermal_get_temp,
+ .get_trend = ti_thermal_get_trend,
+ .bind = ti_thermal_bind,
+ .unbind = ti_thermal_unbind,
+ .get_mode = ti_thermal_get_mode,
+ .set_mode = ti_thermal_set_mode,
+ .get_trip_type = ti_thermal_get_trip_type,
+ .get_trip_temp = ti_thermal_get_trip_temp,
+ .get_crit_temp = ti_thermal_get_crit_temp,
+};
+
+static struct ti_thermal_data
+*ti_thermal_build_data(struct ti_bandgap *bgp, int id)
+{
+ struct ti_thermal_data *data;
+
+ data = devm_kzalloc(bgp->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ dev_err(bgp->dev, "kzalloc fail\n");
+ return NULL;
+ }
+ data->sensor_id = id;
+ data->bgp = bgp;
+ data->mode = THERMAL_DEVICE_ENABLED;
+ INIT_WORK(&data->thermal_wq, ti_thermal_work);
+
+ return data;
+}
+
+int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
+ char *domain)
+{
+ struct ti_thermal_data *data;
+
+ data = ti_bandgap_get_sensor_data(bgp, id);
+
+ if (IS_ERR_OR_NULL(data))
+ data = ti_thermal_build_data(bgp, id);
+
+ if (!data)
+ return -EINVAL;
+
+ /* Create thermal zone */
+ data->ti_thermal = thermal_zone_device_register(domain,
+ OMAP_TRIP_NUMBER, 0, data, &ti_thermal_ops,
+ NULL, FAST_TEMP_MONITORING_RATE,
+ FAST_TEMP_MONITORING_RATE);
+ if (IS_ERR_OR_NULL(data->ti_thermal)) {
+ dev_err(bgp->dev, "thermal zone device is NULL\n");
+ return PTR_ERR(data->ti_thermal);
+ }
+ data->ti_thermal->polling_delay = FAST_TEMP_MONITORING_RATE;
+ ti_bandgap_set_sensor_data(bgp, id, data);
+
+ return 0;
+}
+
+int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
+{
+ struct ti_thermal_data *data;
+
+ data = ti_bandgap_get_sensor_data(bgp, id);
+
+ thermal_zone_device_unregister(data->ti_thermal);
+
+ return 0;
+}
+
+int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
+{
+ struct ti_thermal_data *data;
+
+ data = ti_bandgap_get_sensor_data(bgp, id);
+
+ schedule_work(&data->thermal_wq);
+
+ return 0;
+}
+
+int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
+{
+ struct ti_thermal_data *data;
+
+ data = ti_bandgap_get_sensor_data(bgp, id);
+ if (IS_ERR_OR_NULL(data))
+ data = ti_thermal_build_data(bgp, id);
+
+ if (!data)
+ return -EINVAL;
+
+ if (!cpufreq_get_current_driver()) {
+ dev_dbg(bgp->dev, "no cpufreq driver yet\n");
+ return -EPROBE_DEFER;
+ }
+
+ /* Register cooling device */
+ data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
+ if (IS_ERR_OR_NULL(data->cool_dev)) {
+ dev_err(bgp->dev,
+ "Failed to register cpufreq cooling device\n");
+ return PTR_ERR(data->cool_dev);
+ }
+ ti_bandgap_set_sensor_data(bgp, id, data);
+
+ return 0;
+}
+
+int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
+{
+ struct ti_thermal_data *data;
+
+ data = ti_bandgap_get_sensor_data(bgp, id);
+ cpufreq_cooling_unregister(data->cool_dev);
+
+ return 0;
+}
--- /dev/null
+/*
+ * OMAP thermal definitions
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Contact:
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+#ifndef __TI_THERMAL_H
+#define __TI_THERMAL_H
+
+#include "ti-bandgap.h"
+
+/* sensors gradient and offsets */
+#define OMAP_GRADIENT_SLOPE_4430 0
+#define OMAP_GRADIENT_CONST_4430 20000
+#define OMAP_GRADIENT_SLOPE_4460 348
+#define OMAP_GRADIENT_CONST_4460 -9301
+#define OMAP_GRADIENT_SLOPE_4470 308
+#define OMAP_GRADIENT_CONST_4470 -7896
+
+#define OMAP_GRADIENT_SLOPE_5430_CPU 65
+#define OMAP_GRADIENT_CONST_5430_CPU -1791
+#define OMAP_GRADIENT_SLOPE_5430_GPU 117
+#define OMAP_GRADIENT_CONST_5430_GPU -2992
+
+/* PCB sensor calculation constants */
+#define OMAP_GRADIENT_SLOPE_W_PCB_4430 0
+#define OMAP_GRADIENT_CONST_W_PCB_4430 20000
+#define OMAP_GRADIENT_SLOPE_W_PCB_4460 1142
+#define OMAP_GRADIENT_CONST_W_PCB_4460 -393
+#define OMAP_GRADIENT_SLOPE_W_PCB_4470 1063
+#define OMAP_GRADIENT_CONST_W_PCB_4470 -477
+
+#define OMAP_GRADIENT_SLOPE_W_PCB_5430_CPU 100
+#define OMAP_GRADIENT_CONST_W_PCB_5430_CPU 484
+#define OMAP_GRADIENT_SLOPE_W_PCB_5430_GPU 464
+#define OMAP_GRADIENT_CONST_W_PCB_5430_GPU -5102
+
+/* trip points of interest in milicelsius (at hotspot level) */
+#define OMAP_TRIP_COLD 100000
+#define OMAP_TRIP_HOT 110000
+#define OMAP_TRIP_SHUTDOWN 125000
+#define OMAP_TRIP_NUMBER 2
+#define OMAP_TRIP_STEP \
+ ((OMAP_TRIP_SHUTDOWN - OMAP_TRIP_HOT) / (OMAP_TRIP_NUMBER - 1))
+
+/* Update rates */
+#define FAST_TEMP_MONITORING_RATE 250
+
+/* helper macros */
+/**
+ * ti_thermal_get_trip_value - returns trip temperature based on index
+ * @i: trip index
+ */
+#define ti_thermal_get_trip_value(i) \
+ (OMAP_TRIP_HOT + ((i) * OMAP_TRIP_STEP))
+
+/**
+ * ti_thermal_is_valid_trip - check for trip index
+ * @i: trip index
+ */
+#define ti_thermal_is_valid_trip(trip) \
+ ((trip) >= 0 && (trip) < OMAP_TRIP_NUMBER)
+
+#ifdef CONFIG_TI_THERMAL
+int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, char *domain);
+int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id);
+int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id);
+int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id);
+int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id);
+#else
+static inline
+int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, char *domain)
+{
+ return 0;
+}
+
+static inline
+int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
+{
+ return 0;
+}
+
+static inline
+int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
+{
+ return 0;
+}
+
+static inline
+int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
+{
+ return 0;
+}
+
+static inline
+int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
+{
+ return 0;
+}
+#endif
+#endif
projects / firefly-linux-kernel-4.4.55.git / commitdiff