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Commit 84ca326c authored by Banajit Goswami's avatar Banajit Goswami Committed by Kukjin Kim
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ARM: S5PV210: Add PWM backlight support on SMDKV210 



This patch adds support for LCD backlight using PWM timer for
Samsung SMDKV210 board.

Signed-off-by: default avatarBanajit Goswami <banajit.g@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent fef469f7

arch/arm/mach-s5pv210/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -134,6 +134,7 @@ config MACH_SMDKV210 
	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

arch/arm/mach-s5pv210/mach-smdkv210.c

+13 −41
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ 
#include <plat/pm.h>

#include <plat/fb.h>

#include <plat/s5p-time.h>

#include <plat/backlight.h>



/* Following are default values for UCON, ULCON and UFCON UART registers */

#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,

};



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 = {

	&s3c_device_adc,

	&s3c_device_cfcon,
@@ -270,8 +232,6 @@ static struct platform_device *smdkv210_devices[] __initdata = { 
	&samsung_device_keypad,

	&smdkv210_dm9000,

	&smdkv210_lcd_lte480wv,

	&s3c_device_timer[3],

	&smdkv210_backlight_device,

};



static void __init smdkv210_dm9000_init(void)
@@ -310,6 +270,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { 
	.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)

{

	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);



	samsung_bl_set(&smdkv210_bl_gpio_info, &smdkv210_bl_data);



	platform_add_devices(smdkv210_devices, ARRAY_SIZE(smdkv210_devices));

}