Commit 499d2969 authored by Banajit Goswami's avatar Banajit Goswami Committed by Kukjin Kim

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: default avatarBanajit Goswami <banajit.g@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 1cad6766
...@@ -36,6 +36,7 @@ config MACH_SMDK6440 ...@@ -36,6 +36,7 @@ config MACH_SMDK6440
select S3C_DEV_WDT select S3C_DEV_WDT
select S3C64XX_DEV_SPI select S3C64XX_DEV_SPI
select SAMSUNG_DEV_ADC select SAMSUNG_DEV_ADC
select SAMSUNG_DEV_BACKLIGHT
select SAMSUNG_DEV_PWM select SAMSUNG_DEV_PWM
select SAMSUNG_DEV_TS select SAMSUNG_DEV_TS
select S5P64X0_SETUP_I2C1 select S5P64X0_SETUP_I2C1
......
...@@ -46,6 +46,7 @@ ...@@ -46,6 +46,7 @@
#include <plat/adc.h> #include <plat/adc.h>
#include <plat/ts.h> #include <plat/ts.h>
#include <plat/s5p-time.h> #include <plat/s5p-time.h>
#include <plat/backlight.h>
#define SMDK6440_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ #define SMDK6440_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
S3C2410_UCON_RXILEVEL | \ S3C2410_UCON_RXILEVEL | \
...@@ -91,45 +92,6 @@ static struct s3c2410_uartcfg smdk6440_uartcfgs[] __initdata = { ...@@ -91,45 +92,6 @@ static struct s3c2410_uartcfg smdk6440_uartcfgs[] __initdata = {
}, },
}; };
static int smdk6440_backlight_init(struct device *dev)
{
int ret;
ret = gpio_request(S5P6440_GPF(15), "Backlight");
if (ret) {
printk(KERN_ERR "failed to request GPF for PWM-OUT1\n");
return ret;
}
/* Configure GPIO pin with S5P6440_GPF15_PWM_TOUT1 */
s3c_gpio_cfgpin(S5P6440_GPF(15), S3C_GPIO_SFN(2));
return 0;
}
static void smdk6440_backlight_exit(struct device *dev)
{
s3c_gpio_cfgpin(S5P6440_GPF(15), S3C_GPIO_OUTPUT);
gpio_free(S5P6440_GPF(15));
}
static struct platform_pwm_backlight_data smdk6440_backlight_data = {
.pwm_id = 1,
.max_brightness = 255,
.dft_brightness = 255,
.pwm_period_ns = 78770,
.init = smdk6440_backlight_init,
.exit = smdk6440_backlight_exit,
};
static struct platform_device smdk6440_backlight_device = {
.name = "pwm-backlight",
.dev = {
.parent = &s3c_device_timer[1].dev,
.platform_data = &smdk6440_backlight_data,
},
};
static struct platform_device *smdk6440_devices[] __initdata = { static struct platform_device *smdk6440_devices[] __initdata = {
&s3c_device_adc, &s3c_device_adc,
&s3c_device_rtc, &s3c_device_rtc,
...@@ -139,8 +101,6 @@ static struct platform_device *smdk6440_devices[] __initdata = { ...@@ -139,8 +101,6 @@ static struct platform_device *smdk6440_devices[] __initdata = {
&s3c_device_wdt, &s3c_device_wdt,
&samsung_asoc_dma, &samsung_asoc_dma,
&s5p6440_device_iis, &s5p6440_device_iis,
&s3c_device_timer[1],
&smdk6440_backlight_device,
}; };
static struct s3c2410_platform_i2c s5p6440_i2c0_data __initdata = { static struct s3c2410_platform_i2c s5p6440_i2c0_data __initdata = {
...@@ -175,6 +135,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { ...@@ -175,6 +135,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
.oversampling_shift = 2, .oversampling_shift = 2,
}; };
/* LCD Backlight data */
static struct samsung_bl_gpio_info smdk6440_bl_gpio_info = {
.no = S5P6440_GPF(15),
.func = S3C_GPIO_SFN(2),
};
static struct platform_pwm_backlight_data smdk6440_bl_data = {
.pwm_id = 1,
};
static void __init smdk6440_map_io(void) static void __init smdk6440_map_io(void)
{ {
s5p_init_io(NULL, 0, S5P64X0_SYS_ID); s5p_init_io(NULL, 0, S5P64X0_SYS_ID);
...@@ -194,6 +164,8 @@ static void __init smdk6440_machine_init(void) ...@@ -194,6 +164,8 @@ static void __init smdk6440_machine_init(void)
i2c_register_board_info(1, smdk6440_i2c_devs1, i2c_register_board_info(1, smdk6440_i2c_devs1,
ARRAY_SIZE(smdk6440_i2c_devs1)); ARRAY_SIZE(smdk6440_i2c_devs1));
samsung_bl_set(&smdk6440_bl_gpio_info, &smdk6440_bl_data);
platform_add_devices(smdk6440_devices, ARRAY_SIZE(smdk6440_devices)); platform_add_devices(smdk6440_devices, ARRAY_SIZE(smdk6440_devices));
} }
......
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