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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 <banajit.g@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Banajit Goswami 2011-07-20 23:45:22 +09:00 committed by Kukjin Kim
parent 84ca326c7c
commit 1cad6766ef
2 changed files with 15 additions and 41 deletions
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1
arch/arm/mach-s5pc100/Kconfig
View File

@ -56,6 +56,7 @@ config MACH_SMDKC100
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

55
arch/arm/mach-s5pc100/mach-smdkc100.c
View File

@ -51,6 +51,7 @@
#include <plat/keypad.h>
#include <plat/ts.h>
#include <plat/audio.h>
#include <plat/backlight.h>
/* 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));
}