From 1cad6766ef113a8054a9cd36fdde3f1bbd50138a Mon Sep 17 00:00:00 2001 From: Banajit Goswami Date: Wed, 20 Jul 2011 23:45:22 +0900 Subject: ARM: S5PC100: Add PWM backlight support on SMDKC100 This patch adds support for LCD backlight using PWM timer for Samsung SMDKC100 board. Signed-off-by: Banajit Goswami Signed-off-by: Kukjin Kim --- arch/arm/mach-s5pc100/mach-smdkc100.c | 55 +++++++++-------------------------- 1 file changed, 14 insertions(+), 41 deletions(-) (limited to 'arch/arm/mach-s5pc100/mach-smdkc100.c') diff --git a/arch/arm/mach-s5pc100/mach-smdkc100.c b/arch/arm/mach-s5pc100/mach-smdkc100.c index 0525cb3ef406..c89d6ecb450d 100644 --- a/arch/arm/mach-s5pc100/mach-smdkc100.c +++ b/arch/arm/mach-s5pc100/mach-smdkc100.c @@ -51,6 +51,7 @@ #include #include #include +#include /* Following are default values for UCON, ULCON and UFCON UART registers */ #define SMDKC100_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ @@ -179,45 +180,6 @@ static struct samsung_keypad_platdata smdkc100_keypad_data __initdata = { .cols = 8, }; -static int smdkc100_backlight_init(struct device *dev) -{ - int ret; - - ret = gpio_request(S5PC100_GPD(0), "Backlight"); - if (ret) { - printk(KERN_ERR "failed to request GPF for PWM-OUT0\n"); - return ret; - } - - /* Configure GPIO pin with S5PC100_GPD_TOUT_0 */ - s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_SFN(2)); - - return 0; -} - -static void smdkc100_backlight_exit(struct device *dev) -{ - s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_OUTPUT); - gpio_free(S5PC100_GPD(0)); -} - -static struct platform_pwm_backlight_data smdkc100_backlight_data = { - .pwm_id = 0, - .max_brightness = 255, - .dft_brightness = 255, - .pwm_period_ns = 78770, - .init = smdkc100_backlight_init, - .exit = smdkc100_backlight_exit, -}; - -static struct platform_device smdkc100_backlight_device = { - .name = "pwm-backlight", - .dev = { - .parent = &s3c_device_timer[0].dev, - .platform_data = &smdkc100_backlight_data, - }, -}; - static struct platform_device *smdkc100_devices[] __initdata = { &s3c_device_adc, &s3c_device_cfcon, @@ -239,8 +201,6 @@ static struct platform_device *smdkc100_devices[] __initdata = { &s5p_device_fimc1, &s5p_device_fimc2, &s5pc100_device_spdif, - &s3c_device_timer[0], - &smdkc100_backlight_device, }; static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { @@ -249,6 +209,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { .oversampling_shift = 2, }; +/* LCD Backlight data */ +static struct samsung_bl_gpio_info smdkc100_bl_gpio_info = { + .no = S5PC100_GPD(0), + .func = S3C_GPIO_SFN(2), +}; + +static struct platform_pwm_backlight_data smdkc100_bl_data = { + .pwm_id = 0, +}; + static void __init smdkc100_map_io(void) { s5p_init_io(NULL, 0, S5P_VA_CHIPID); @@ -276,6 +246,9 @@ static void __init smdkc100_machine_init(void) /* LCD init */ gpio_request(S5PC100_GPH0(6), "GPH0"); smdkc100_lcd_power_set(&smdkc100_lcd_power_data, 0); + + samsung_bl_set(&smdkc100_bl_gpio_info, &smdkc100_bl_data); + platform_add_devices(smdkc100_devices, ARRAY_SIZE(smdkc100_devices)); } -- cgit v1.2.1