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Commit 1cad6766 authored by Banajit Goswami's avatar Banajit Goswami Committed by Kukjin Kim
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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: default avatarBanajit Goswami <banajit.g@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 84ca326c

arch/arm/mach-s5pc100/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-s5pc100/mach-smdkc100.c

+14 −41
Original line number Diff line number Diff line
@@ -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));

}