ARM: S5P64X0: Add PWM backlight support on SMDK6440
This patch adds support for LCD backlight using PWM timer for Samsung SMDK6440 board. Signed-off-by: Banajit Goswami <banajit.g@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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Родитель
1cad6766ef
Коммит
499d296957
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@ -36,6 +36,7 @@ config MACH_SMDK6440
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select S3C_DEV_WDT
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select S3C64XX_DEV_SPI
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select SAMSUNG_DEV_ADC
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select SAMSUNG_DEV_BACKLIGHT
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select SAMSUNG_DEV_PWM
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select SAMSUNG_DEV_TS
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select S5P64X0_SETUP_I2C1
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@ -46,6 +46,7 @@
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#include <plat/adc.h>
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#include <plat/ts.h>
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#include <plat/s5p-time.h>
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#include <plat/backlight.h>
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#define SMDK6440_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
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S3C2410_UCON_RXILEVEL | \
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@ -91,45 +92,6 @@ static struct s3c2410_uartcfg smdk6440_uartcfgs[] __initdata = {
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},
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};
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static int smdk6440_backlight_init(struct device *dev)
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{
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int ret;
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ret = gpio_request(S5P6440_GPF(15), "Backlight");
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if (ret) {
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printk(KERN_ERR "failed to request GPF for PWM-OUT1\n");
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return ret;
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}
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/* Configure GPIO pin with S5P6440_GPF15_PWM_TOUT1 */
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s3c_gpio_cfgpin(S5P6440_GPF(15), S3C_GPIO_SFN(2));
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return 0;
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}
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static void smdk6440_backlight_exit(struct device *dev)
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{
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s3c_gpio_cfgpin(S5P6440_GPF(15), S3C_GPIO_OUTPUT);
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gpio_free(S5P6440_GPF(15));
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}
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static struct platform_pwm_backlight_data smdk6440_backlight_data = {
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.pwm_id = 1,
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.max_brightness = 255,
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.dft_brightness = 255,
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.pwm_period_ns = 78770,
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.init = smdk6440_backlight_init,
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.exit = smdk6440_backlight_exit,
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};
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static struct platform_device smdk6440_backlight_device = {
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.name = "pwm-backlight",
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.dev = {
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.parent = &s3c_device_timer[1].dev,
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.platform_data = &smdk6440_backlight_data,
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},
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};
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static struct platform_device *smdk6440_devices[] __initdata = {
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&s3c_device_adc,
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&s3c_device_rtc,
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@ -139,8 +101,6 @@ static struct platform_device *smdk6440_devices[] __initdata = {
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&s3c_device_wdt,
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&samsung_asoc_dma,
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&s5p6440_device_iis,
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&s3c_device_timer[1],
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&smdk6440_backlight_device,
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};
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static struct s3c2410_platform_i2c s5p6440_i2c0_data __initdata = {
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@ -175,6 +135,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
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.oversampling_shift = 2,
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};
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/* LCD Backlight data */
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static struct samsung_bl_gpio_info smdk6440_bl_gpio_info = {
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.no = S5P6440_GPF(15),
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.func = S3C_GPIO_SFN(2),
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};
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static struct platform_pwm_backlight_data smdk6440_bl_data = {
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.pwm_id = 1,
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};
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static void __init smdk6440_map_io(void)
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{
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s5p_init_io(NULL, 0, S5P64X0_SYS_ID);
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@ -194,6 +164,8 @@ static void __init smdk6440_machine_init(void)
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i2c_register_board_info(1, smdk6440_i2c_devs1,
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ARRAY_SIZE(smdk6440_i2c_devs1));
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samsung_bl_set(&smdk6440_bl_gpio_info, &smdk6440_bl_data);
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platform_add_devices(smdk6440_devices, ARRAY_SIZE(smdk6440_devices));
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}
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