From: Henry Chen Date: Fri, 24 Jul 2015 05:24:41 +0000 (+0800) Subject: regulator: mt6311: Add support for mt6311 regulator X-Git-Tag: firefly_0821_release~176^2~1211^2~2^2~3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8766018b6ef73ca124d13b0d0a06dec906726cc8;p=firefly-linux-kernel-4.4.55.git regulator: mt6311: Add support for mt6311 regulator Add regulator support for mt6311. It has 2 regulaotrs - Buck and LDO, provide the related buck/ldo voltage data to the driver, and creates the regulator_desc table. Supported operations for Buck are enabled/disabled and voltage change, only enabled/disabled for LDO. Signed-off-by: Henry Chen Reviewed-by: Javier Martinez Canillas Signed-off-by: Mark Brown --- diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index bef3bde6971b..aab09ac499a0 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -451,6 +451,15 @@ config REGULATOR_MC13892 Say y here to support the regulators found on the Freescale MC13892 PMIC. +config REGULATOR_MT6311 + tristate "MediaTek MT6311 PMIC" + depends on I2C + help + Say y here to select this option to enable the power regulator of + MediaTek MT6311 PMIC. + This driver supports the control of different power rails of device + through regulator interface. + config REGULATOR_MT6397 tristate "MediaTek MT6397 PMIC" depends on MFD_MT6397 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 91bf76267404..45e790f92715 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_REGULATOR_MAX77843) += max77843.o obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o +obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o diff --git a/drivers/regulator/mt6311-regulator.c b/drivers/regulator/mt6311-regulator.c new file mode 100644 index 000000000000..096e6202be1c --- /dev/null +++ b/drivers/regulator/mt6311-regulator.c @@ -0,0 +1,180 @@ +/* + * Copyright (c) 2015 MediaTek Inc. + * Author: Henry Chen + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "mt6311-regulator.h" + +static const struct regmap_config mt6311_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = MT6311_FQMTR_CON4, +}; + +/* Default limits measured in millivolts and milliamps */ +#define MT6311_MIN_UV 600000 +#define MT6311_MAX_UV 1400000 +#define MT6311_STEP_UV 6250 + +static const struct regulator_linear_range buck_volt_range[] = { + REGULATOR_LINEAR_RANGE(MT6311_MIN_UV, 0, 0x7f, MT6311_STEP_UV), +}; + +static struct regulator_ops mt6311_buck_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +static struct regulator_ops mt6311_ldo_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +#define MT6311_BUCK(_id) \ +{\ + .name = #_id,\ + .ops = &mt6311_buck_ops,\ + .of_match = of_match_ptr(#_id),\ + .regulators_node = of_match_ptr("regulators"),\ + .type = REGULATOR_VOLTAGE,\ + .id = MT6311_ID_##_id,\ + .n_voltages = (MT6311_MAX_UV - MT6311_MIN_UV) / MT6311_STEP_UV + 1,\ + .min_uV = MT6311_MIN_UV,\ + .uV_step = MT6311_STEP_UV,\ + .owner = THIS_MODULE,\ + .linear_ranges = buck_volt_range, \ + .n_linear_ranges = ARRAY_SIZE(buck_volt_range), \ + .enable_reg = MT6311_VDVFS11_CON9,\ + .enable_mask = MT6311_PMIC_VDVFS11_EN_MASK,\ + .vsel_reg = MT6311_VDVFS11_CON12,\ + .vsel_mask = MT6311_PMIC_VDVFS11_VOSEL_MASK,\ +} + +#define MT6311_LDO(_id) \ +{\ + .name = #_id,\ + .ops = &mt6311_ldo_ops,\ + .of_match = of_match_ptr(#_id),\ + .regulators_node = of_match_ptr("regulators"),\ + .type = REGULATOR_VOLTAGE,\ + .id = MT6311_ID_##_id,\ + .owner = THIS_MODULE,\ + .enable_reg = MT6311_LDO_CON3,\ + .enable_mask = MT6311_PMIC_RG_VBIASN_EN_MASK,\ +} + +static struct regulator_desc mt6311_regulators[] = { + MT6311_BUCK(VDVFS), + MT6311_LDO(VBIASN), +}; + +/* + * I2C driver interface functions + */ +static int mt6311_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct regulator_config config = { }; + struct regulator_dev *rdev; + struct regmap *regmap; + int error, i, ret; + unsigned int data; + + regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config); + if (IS_ERR(regmap)) { + error = PTR_ERR(regmap); + dev_err(&i2c->dev, "Failed to allocate register map: %d\n", + error); + return error; + } + + ret = regmap_read(regmap, MT6311_SWCID, &data); + if (ret < 0) { + dev_err(&i2c->dev, "Failed to read DEVICE_ID reg: %d\n", ret); + return ret; + } + + switch (data) { + case MT6311_E1_CID_CODE: + case MT6311_E2_CID_CODE: + case MT6311_E3_CID_CODE: + break; + default: + dev_err(&i2c->dev, "Unsupported device id = 0x%x.\n", data); + return -ENODEV; + } + + for (i = 0; i < MT6311_MAX_REGULATORS; i++) { + config.dev = &i2c->dev; + config.regmap = regmap; + + rdev = devm_regulator_register(&i2c->dev, + &mt6311_regulators[i], &config); + if (IS_ERR(rdev)) { + dev_err(&i2c->dev, + "Failed to register MT6311 regulator\n"); + return PTR_ERR(rdev); + } + } + + return 0; +} + +static const struct i2c_device_id mt6311_i2c_id[] = { + {"mt6311", 0}, + {}, +}; +MODULE_DEVICE_TABLE(i2c, mt6311_i2c_id); + +#ifdef CONFIG_OF +static const struct of_device_id mt6311_dt_ids[] = { + { .compatible = "mediatek,mt6311-regulator", + .data = &mt6311_i2c_id[0] }, + {}, +}; +MODULE_DEVICE_TABLE(of, mt6311_dt_ids); +#endif + +static struct i2c_driver mt6311_regulator_driver = { + .driver = { + .name = "mt6311", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(mt6311_dt_ids), + }, + .probe = mt6311_i2c_probe, + .id_table = mt6311_i2c_id, +}; + +module_i2c_driver(mt6311_regulator_driver); + +MODULE_AUTHOR("Henry Chen "); +MODULE_DESCRIPTION("Regulator device driver for Mediatek MT6311"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/regulator/mt6311-regulator.h b/drivers/regulator/mt6311-regulator.h new file mode 100644 index 000000000000..5218db46a798 --- /dev/null +++ b/drivers/regulator/mt6311-regulator.h @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2015 MediaTek Inc. + * Author: Henry Chen + * + * 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. + */ + +#ifndef __MT6311_REGULATOR_H__ +#define __MT6311_REGULATOR_H__ + +#define MT6311_SWCID 0x01 + +#define MT6311_TOP_INT_CON 0x18 +#define MT6311_TOP_INT_MON 0x19 + +#define MT6311_VDVFS11_CON0 0x87 +#define MT6311_VDVFS11_CON7 0x88 +#define MT6311_VDVFS11_CON8 0x89 +#define MT6311_VDVFS11_CON9 0x8A +#define MT6311_VDVFS11_CON10 0x8B +#define MT6311_VDVFS11_CON11 0x8C +#define MT6311_VDVFS11_CON12 0x8D +#define MT6311_VDVFS11_CON13 0x8E +#define MT6311_VDVFS11_CON14 0x8F +#define MT6311_VDVFS11_CON15 0x90 +#define MT6311_VDVFS11_CON16 0x91 +#define MT6311_VDVFS11_CON17 0x92 +#define MT6311_VDVFS11_CON18 0x93 +#define MT6311_VDVFS11_CON19 0x94 + +#define MT6311_LDO_CON0 0xCC +#define MT6311_LDO_OCFB0 0xCD +#define MT6311_LDO_CON2 0xCE +#define MT6311_LDO_CON3 0xCF +#define MT6311_LDO_CON4 0xD0 +#define MT6311_FQMTR_CON0 0xD1 +#define MT6311_FQMTR_CON1 0xD2 +#define MT6311_FQMTR_CON2 0xD3 +#define MT6311_FQMTR_CON3 0xD4 +#define MT6311_FQMTR_CON4 0xD5 + +#define MT6311_PMIC_RG_INT_POL_MASK 0x1 +#define MT6311_PMIC_RG_INT_EN_MASK 0x2 +#define MT6311_PMIC_RG_BUCK_OC_INT_STATUS_MASK 0x10 + +#define MT6311_PMIC_VDVFS11_EN_CTRL_MASK 0x1 +#define MT6311_PMIC_VDVFS11_VOSEL_CTRL_MASK 0x2 +#define MT6311_PMIC_VDVFS11_EN_SEL_MASK 0x3 +#define MT6311_PMIC_VDVFS11_VOSEL_SEL_MASK 0xc +#define MT6311_PMIC_VDVFS11_EN_MASK 0x1 +#define MT6311_PMIC_VDVFS11_VOSEL_MASK 0x7F +#define MT6311_PMIC_VDVFS11_VOSEL_ON_MASK 0x7F +#define MT6311_PMIC_VDVFS11_VOSEL_SLEEP_MASK 0x7F +#define MT6311_PMIC_NI_VDVFS11_VOSEL_MASK 0x7F + +#define MT6311_PMIC_RG_VBIASN_EN_MASK 0x1 + +#endif diff --git a/include/linux/regulator/mt6311.h b/include/linux/regulator/mt6311.h new file mode 100644 index 000000000000..8473259395b6 --- /dev/null +++ b/include/linux/regulator/mt6311.h @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2015 MediaTek Inc. + * Author: Henry Chen + * + * 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. + */ + +#ifndef __LINUX_REGULATOR_MT6311_H +#define __LINUX_REGULATOR_MT6311_H + +#define MT6311_MAX_REGULATORS 2 + +enum { + MT6311_ID_VDVFS = 0, + MT6311_ID_VBIASN, +}; + +#define MT6311_E1_CID_CODE 0x10 +#define MT6311_E2_CID_CODE 0x20 +#define MT6311_E3_CID_CODE 0x30 + +#endif /* __LINUX_REGULATOR_MT6311_H */