2 * Copyright (C) 2010 Texas Instruments Inc.
4 * Modified from mach-omap2/board-zoom-peripherals.c
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/platform_device.h>
14 #include <linux/gpio.h>
15 #include <linux/i2c/twl.h>
16 #include <linux/spi/spi.h>
17 #include <linux/platform_data/spi-omap2-mcspi.h>
18 #include <video/omapdss.h>
19 #include <mach/board-zoom.h>
23 #define LCD_PANEL_RESET_GPIO_PROD 96
24 #define LCD_PANEL_RESET_GPIO_PILOT 55
25 #define LCD_PANEL_QVGA_GPIO 56
27 static struct gpio zoom_lcd_gpios[] __initdata = {
28 { -EINVAL, GPIOF_OUT_INIT_HIGH, "lcd reset" },
29 { LCD_PANEL_QVGA_GPIO, GPIOF_OUT_INIT_HIGH, "lcd qvga" },
32 static void __init zoom_lcd_panel_init(void)
34 zoom_lcd_gpios[0].gpio = (omap_rev() > OMAP3430_REV_ES3_0) ?
35 LCD_PANEL_RESET_GPIO_PROD :
36 LCD_PANEL_RESET_GPIO_PILOT;
38 if (gpio_request_array(zoom_lcd_gpios, ARRAY_SIZE(zoom_lcd_gpios)))
39 pr_err("%s: Failed to get LCD GPIOs.\n", __func__);
42 static int zoom_panel_enable_lcd(struct omap_dss_device *dssdev)
47 static void zoom_panel_disable_lcd(struct omap_dss_device *dssdev)
52 * PWMA/B register offsets (TWL4030_MODULE_PWMA)
54 #define TWL_INTBR_PMBR1 0xD
55 #define TWL_INTBR_GPBR1 0xC
56 #define TWL_LED_PWMON 0x0
57 #define TWL_LED_PWMOFF 0x1
59 static int zoom_set_bl_intensity(struct omap_dss_device *dssdev, int level)
61 #ifdef CONFIG_TWL4030_CORE
68 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &mux_pwm, TWL_INTBR_PMBR1);
69 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &enb_pwm, TWL_INTBR_GPBR1);
72 /* disable pwm1 output and clock */
73 enb_pwm = enb_pwm & 0xF5;
74 /* change pwm1 pin to gpio pin */
75 mux_pwm = mux_pwm & 0xCF;
76 twl_i2c_write_u8(TWL4030_MODULE_INTBR,
77 enb_pwm, TWL_INTBR_GPBR1);
78 twl_i2c_write_u8(TWL4030_MODULE_INTBR,
79 mux_pwm, TWL_INTBR_PMBR1);
83 if (!((enb_pwm & 0xA) && (mux_pwm & 0x30))) {
84 /* change gpio pin to pwm1 pin */
85 mux_pwm = mux_pwm | 0x30;
86 /* enable pwm1 output and clock*/
87 enb_pwm = enb_pwm | 0x0A;
88 twl_i2c_write_u8(TWL4030_MODULE_INTBR,
89 mux_pwm, TWL_INTBR_PMBR1);
90 twl_i2c_write_u8(TWL4030_MODULE_INTBR,
91 enb_pwm, TWL_INTBR_GPBR1);
94 c = ((50 * (100 - level)) / 100) + 1;
95 twl_i2c_write_u8(TWL4030_MODULE_PWM1, 0x7F, TWL_LED_PWMOFF);
96 twl_i2c_write_u8(TWL4030_MODULE_PWM1, c, TWL_LED_PWMON);
98 pr_warn("Backlight not enabled\n");
104 static struct omap_dss_device zoom_lcd_device = {
106 .driver_name = "NEC_8048_panel",
107 .type = OMAP_DISPLAY_TYPE_DPI,
108 .phy.dpi.data_lines = 24,
109 .platform_enable = zoom_panel_enable_lcd,
110 .platform_disable = zoom_panel_disable_lcd,
111 .max_backlight_level = 100,
112 .set_backlight = zoom_set_bl_intensity,
115 static struct omap_dss_device *zoom_dss_devices[] = {
119 static struct omap_dss_board_info zoom_dss_data = {
120 .num_devices = ARRAY_SIZE(zoom_dss_devices),
121 .devices = zoom_dss_devices,
122 .default_device = &zoom_lcd_device,
125 static struct omap2_mcspi_device_config dss_lcd_mcspi_config = {
129 static struct spi_board_info nec_8048_spi_board_info[] __initdata = {
131 .modalias = "nec_8048_spi",
134 .max_speed_hz = 375000,
135 .controller_data = &dss_lcd_mcspi_config,
139 void __init zoom_display_init(void)
141 omap_display_init(&zoom_dss_data);
142 spi_register_board_info(nec_8048_spi_board_info,
143 ARRAY_SIZE(nec_8048_spi_board_info));
144 zoom_lcd_panel_init();