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ARM: S5PV210: Add PWM backlight support on SMDKV210

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This patch adds support for LCD backlight using PWM timer for
Samsung SMDKV210 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 fef469f7c2
commit 84ca326c7c
2 changed files with 14 additions and 41 deletions
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1
arch/arm/mach-s5pv210/Kconfig
View File

@ -134,6 +134,7 @@ config MACH_SMDKV210
select S3C_DEV_RTC select S3C_DEV_RTC
select S3C_DEV_WDT select S3C_DEV_WDT
select SAMSUNG_DEV_ADC select SAMSUNG_DEV_ADC
select SAMSUNG_DEV_BACKLIGHT
select SAMSUNG_DEV_IDE select SAMSUNG_DEV_IDE
select SAMSUNG_DEV_KEYPAD select SAMSUNG_DEV_KEYPAD
select SAMSUNG_DEV_PWM select SAMSUNG_DEV_PWM

54
arch/arm/mach-s5pv210/mach-smdkv210.c
View File

@ -45,6 +45,7 @@
#include <plat/pm.h> #include <plat/pm.h>
#include <plat/fb.h> #include <plat/fb.h>
#include <plat/s5p-time.h> #include <plat/s5p-time.h>
#include <plat/backlight.h>
/* Following are default values for UCON, ULCON and UFCON UART registers */ /* Following are default values for UCON, ULCON and UFCON UART registers */
#define SMDKV210_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ #define SMDKV210_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
@ -210,45 +211,6 @@ static struct s3c_fb_platdata smdkv210_lcd0_pdata __initdata = {
.setup_gpio = s5pv210_fb_gpio_setup_24bpp, .setup_gpio = s5pv210_fb_gpio_setup_24bpp,
}; };
static int smdkv210_backlight_init(struct device *dev)
{
int ret;
ret = gpio_request(S5PV210_GPD0(3), "Backlight");
if (ret) {
printk(KERN_ERR "failed to request GPD for PWM-OUT 3\n");
return ret;
}
/* Configure GPIO pin with S5PV210_GPD_0_3_TOUT_3 */
s3c_gpio_cfgpin(S5PV210_GPD0(3), S3C_GPIO_SFN(2));
return 0;
}
static void smdkv210_backlight_exit(struct device *dev)
{
s3c_gpio_cfgpin(S5PV210_GPD0(3), S3C_GPIO_OUTPUT);
gpio_free(S5PV210_GPD0(3));
}
static struct platform_pwm_backlight_data smdkv210_backlight_data = {
.pwm_id = 3,
.max_brightness = 255,
.dft_brightness = 255,
.pwm_period_ns = 78770,
.init = smdkv210_backlight_init,
.exit = smdkv210_backlight_exit,
};
static struct platform_device smdkv210_backlight_device = {
.name = "pwm-backlight",
.dev = {
.parent = &s3c_device_timer[3].dev,
.platform_data = &smdkv210_backlight_data,
},
};
static struct platform_device *smdkv210_devices[] __initdata = { static struct platform_device *smdkv210_devices[] __initdata = {
&s3c_device_adc, &s3c_device_adc,
&s3c_device_cfcon, &s3c_device_cfcon,
@ -270,8 +232,6 @@ static struct platform_device *smdkv210_devices[] __initdata = {
&samsung_device_keypad, &samsung_device_keypad,
&smdkv210_dm9000, &smdkv210_dm9000,
&smdkv210_lcd_lte480wv, &smdkv210_lcd_lte480wv,
&s3c_device_timer[3],
&smdkv210_backlight_device,
}; };
static void __init smdkv210_dm9000_init(void) static void __init smdkv210_dm9000_init(void)
@ -310,6 +270,16 @@ 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 smdkv210_bl_gpio_info = {
.no = S5PV210_GPD0(3),
.func = S3C_GPIO_SFN(2),
};
static struct platform_pwm_backlight_data smdkv210_bl_data = {
.pwm_id = 3,
};
static void __init smdkv210_map_io(void) static void __init smdkv210_map_io(void)
{ {
s5p_init_io(NULL, 0, S5P_VA_CHIPID); s5p_init_io(NULL, 0, S5P_VA_CHIPID);
@ -341,6 +311,8 @@ static void __init smdkv210_machine_init(void)
s3c_fb_set_platdata(&smdkv210_lcd0_pdata); s3c_fb_set_platdata(&smdkv210_lcd0_pdata);
samsung_bl_set(&smdkv210_bl_gpio_info, &smdkv210_bl_data);
platform_add_devices(smdkv210_devices, ARRAY_SIZE(smdkv210_devices)); platform_add_devices(smdkv210_devices, ARRAY_SIZE(smdkv210_devices));
} }