From 84ca326c7c77926ccb501eaa89f50d9230a9543b Mon Sep 17 00:00:00 2001 From: Banajit Goswami Date: Wed, 20 Jul 2011 23:45:22 +0900 Subject: ARM: S5PV210: Add PWM backlight support on SMDKV210 This patch adds support for LCD backlight using PWM timer for Samsung SMDKV210 board. Signed-off-by: Banajit Goswami Signed-off-by: Kukjin Kim --- arch/arm/mach-s5pv210/Kconfig | 1 + arch/arm/mach-s5pv210/mach-smdkv210.c | 54 +++++++++-------------------------- 2 files changed, 14 insertions(+), 41 deletions(-) diff --git a/arch/arm/mach-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig index 37b5a97594a5..79bb3a0314ef 100644 --- a/arch/arm/mach-s5pv210/Kconfig +++ b/arch/arm/mach-s5pv210/Kconfig @@ -134,6 +134,7 @@ config MACH_SMDKV210 select S3C_DEV_RTC select S3C_DEV_WDT select SAMSUNG_DEV_ADC + select SAMSUNG_DEV_BACKLIGHT select SAMSUNG_DEV_IDE select SAMSUNG_DEV_KEYPAD select SAMSUNG_DEV_PWM diff --git a/arch/arm/mach-s5pv210/mach-smdkv210.c b/arch/arm/mach-s5pv210/mach-smdkv210.c index c6a9e86c2d5c..c4d9b7dd098e 100644 --- a/arch/arm/mach-s5pv210/mach-smdkv210.c +++ b/arch/arm/mach-s5pv210/mach-smdkv210.c @@ -45,6 +45,7 @@ #include #include #include +#include /* Following are default values for UCON, ULCON and UFCON UART registers */ #define SMDKV210_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ @@ -210,45 +211,6 @@ static struct s3c_fb_platdata smdkv210_lcd0_pdata __initdata = { .setup_gpio = s5pv210_fb_gpio_setup_24bpp, }; -static int smdkv210_backlight_init(struct device *dev) -{ - int ret; - - ret = gpio_request(S5PV210_GPD0(3), "Backlight"); - if (ret) { - printk(KERN_ERR "failed to request GPD for PWM-OUT 3\n"); - return ret; - } - - /* Configure GPIO pin with S5PV210_GPD_0_3_TOUT_3 */ - s3c_gpio_cfgpin(S5PV210_GPD0(3), S3C_GPIO_SFN(2)); - - return 0; -} - -static void smdkv210_backlight_exit(struct device *dev) -{ - s3c_gpio_cfgpin(S5PV210_GPD0(3), S3C_GPIO_OUTPUT); - gpio_free(S5PV210_GPD0(3)); -} - -static struct platform_pwm_backlight_data smdkv210_backlight_data = { - .pwm_id = 3, - .max_brightness = 255, - .dft_brightness = 255, - .pwm_period_ns = 78770, - .init = smdkv210_backlight_init, - .exit = smdkv210_backlight_exit, -}; - -static struct platform_device smdkv210_backlight_device = { - .name = "pwm-backlight", - .dev = { - .parent = &s3c_device_timer[3].dev, - .platform_data = &smdkv210_backlight_data, - }, -}; - static struct platform_device *smdkv210_devices[] __initdata = { &s3c_device_adc, &s3c_device_cfcon, @@ -270,8 +232,6 @@ static struct platform_device *smdkv210_devices[] __initdata = { &samsung_device_keypad, &smdkv210_dm9000, &smdkv210_lcd_lte480wv, - &s3c_device_timer[3], - &smdkv210_backlight_device, }; static void __init smdkv210_dm9000_init(void) @@ -310,6 +270,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { .oversampling_shift = 2, }; +/* LCD Backlight data */ +static struct samsung_bl_gpio_info smdkv210_bl_gpio_info = { + .no = S5PV210_GPD0(3), + .func = S3C_GPIO_SFN(2), +}; + +static struct platform_pwm_backlight_data smdkv210_bl_data = { + .pwm_id = 3, +}; + static void __init smdkv210_map_io(void) { s5p_init_io(NULL, 0, S5P_VA_CHIPID); @@ -341,6 +311,8 @@ static void __init smdkv210_machine_init(void) s3c_fb_set_platdata(&smdkv210_lcd0_pdata); + samsung_bl_set(&smdkv210_bl_gpio_info, &smdkv210_bl_data); + platform_add_devices(smdkv210_devices, ARRAY_SIZE(smdkv210_devices)); } -- cgit v1.2.2