From 543601f526bbe02d209d2f8c30b9ce59d8e70a41 Mon Sep 17 00:00:00 2001 From: Banajit Goswami Date: Wed, 20 Jul 2011 23:45:22 +0900 Subject: ARM: S5P64X0: Add PWM backlight support on SMDK6450 This patch adds support for LCD backlight using PWM timer for Samsung SMDK6450 board. Signed-off-by: Banajit Goswami Signed-off-by: Kukjin Kim --- arch/arm/mach-s5p64x0/Kconfig | 1 + arch/arm/mach-s5p64x0/mach-smdk6450.c | 54 +++++++++-------------------------- 2 files changed, 14 insertions(+), 41 deletions(-) (limited to 'arch/arm/mach-s5p64x0') diff --git a/arch/arm/mach-s5p64x0/Kconfig b/arch/arm/mach-s5p64x0/Kconfig index 34e287719f0f..65c7518dad7f 100644 --- a/arch/arm/mach-s5p64x0/Kconfig +++ b/arch/arm/mach-s5p64x0/Kconfig @@ -51,6 +51,7 @@ config MACH_SMDK6450 select S3C_DEV_WDT select S3C64XX_DEV_SPI select SAMSUNG_DEV_ADC + select SAMSUNG_DEV_BACKLIGHT select SAMSUNG_DEV_PWM select SAMSUNG_DEV_TS select S5P64X0_SETUP_I2C1 diff --git a/arch/arm/mach-s5p64x0/mach-smdk6450.c b/arch/arm/mach-s5p64x0/mach-smdk6450.c index d19c4690ee97..33f2adf8f3fe 100644 --- a/arch/arm/mach-s5p64x0/mach-smdk6450.c +++ b/arch/arm/mach-s5p64x0/mach-smdk6450.c @@ -46,6 +46,7 @@ #include #include #include +#include #define SMDK6450_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ S3C2410_UCON_RXILEVEL | \ @@ -109,45 +110,6 @@ static struct s3c2410_uartcfg smdk6450_uartcfgs[] __initdata = { #endif }; -static int smdk6450_backlight_init(struct device *dev) -{ - int ret; - - ret = gpio_request(S5P6450_GPF(15), "Backlight"); - if (ret) { - printk(KERN_ERR "failed to request GPF for PWM-OUT1\n"); - return ret; - } - - /* Configure GPIO pin with S5P6450_GPF15_PWM_TOUT1 */ - s3c_gpio_cfgpin(S5P6450_GPF(15), S3C_GPIO_SFN(2)); - - return 0; -} - -static void smdk6450_backlight_exit(struct device *dev) -{ - s3c_gpio_cfgpin(S5P6450_GPF(15), S3C_GPIO_OUTPUT); - gpio_free(S5P6450_GPF(15)); -} - -static struct platform_pwm_backlight_data smdk6450_backlight_data = { - .pwm_id = 1, - .max_brightness = 255, - .dft_brightness = 255, - .pwm_period_ns = 78770, - .init = smdk6450_backlight_init, - .exit = smdk6450_backlight_exit, -}; - -static struct platform_device smdk6450_backlight_device = { - .name = "pwm-backlight", - .dev = { - .parent = &s3c_device_timer[1].dev, - .platform_data = &smdk6450_backlight_data, - }, -}; - static struct platform_device *smdk6450_devices[] __initdata = { &s3c_device_adc, &s3c_device_rtc, @@ -157,8 +119,6 @@ static struct platform_device *smdk6450_devices[] __initdata = { &s3c_device_wdt, &samsung_asoc_dma, &s5p6450_device_iis0, - &s3c_device_timer[1], - &smdk6450_backlight_device, /* s5p6450_device_spi0 will be added */ }; @@ -194,6 +154,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { .oversampling_shift = 2, }; +/* LCD Backlight data */ +static struct samsung_bl_gpio_info smdk6450_bl_gpio_info = { + .no = S5P6450_GPF(15), + .func = S3C_GPIO_SFN(2), +}; + +static struct platform_pwm_backlight_data smdk6450_bl_data = { + .pwm_id = 1, +}; + static void __init smdk6450_map_io(void) { s5p_init_io(NULL, 0, S5P64X0_SYS_ID); @@ -213,6 +183,8 @@ static void __init smdk6450_machine_init(void) i2c_register_board_info(1, smdk6450_i2c_devs1, ARRAY_SIZE(smdk6450_i2c_devs1)); + samsung_bl_set(&smdk6450_bl_gpio_info, &smdk6450_bl_data); + platform_add_devices(smdk6450_devices, ARRAY_SIZE(smdk6450_devices)); } -- cgit v1.2.3