Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit baa0c060 authored by Banajit Goswami's avatar Banajit Goswami Committed by Kukjin Kim
Browse files

ARM: SAMSUNG: Add PWM backlight support on Samsung S5PC100 



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 b0fd644f

arch/arm/mach-s5pc100/Kconfig

+1 −0
Original line number Original line Diff line number Diff line
@@ -58,6 +58,7 @@ config MACH_SMDKC100 
	select SAMSUNG_DEV_ADC

	select SAMSUNG_DEV_ADC

	select SAMSUNG_DEV_IDE

	select SAMSUNG_DEV_IDE

	select SAMSUNG_DEV_KEYPAD

	select SAMSUNG_DEV_KEYPAD

	select SAMSUNG_DEV_PWM

	select SAMSUNG_DEV_TS

	select SAMSUNG_DEV_TS

	select S5PC100_SETUP_FB_24BPP

	select S5PC100_SETUP_FB_24BPP

	select S5PC100_SETUP_I2C1

	select S5PC100_SETUP_I2C1

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

+44 −4
Original line number Original line Diff line number Diff line
@@ -23,12 +23,15 @@ 
#include <linux/fb.h>

#include <linux/fb.h>

#include <linux/delay.h>

#include <linux/delay.h>

#include <linux/input.h>

#include <linux/input.h>

#include <linux/pwm_backlight.h>





#include <asm/mach/arch.h>

#include <asm/mach/arch.h>

#include <asm/mach/map.h>

#include <asm/mach/map.h>





#include <mach/map.h>

#include <mach/map.h>

#include <mach/regs-fb.h>

#include <mach/regs-fb.h>

#include <mach/regs-gpio.h>



#include <video/platform_lcd.h>

#include <video/platform_lcd.h>





#include <asm/irq.h>

#include <asm/irq.h>
@@ -107,9 +110,6 @@ static struct i2c_board_info i2c_devs1[] __initdata = { 
static void smdkc100_lcd_power_set(struct plat_lcd_data *pd,

static void smdkc100_lcd_power_set(struct plat_lcd_data *pd,

				   unsigned int power)

				   unsigned int power)

{

{

	/* backlight */

	gpio_direction_output(S5PC100_GPD(0), power);



	if (power) {

	if (power) {

		/* module reset */

		/* module reset */

		gpio_direction_output(S5PC100_GPH0(6), 1);

		gpio_direction_output(S5PC100_GPH0(6), 1);
@@ -179,6 +179,45 @@ static struct samsung_keypad_platdata smdkc100_keypad_data __initdata = { 
	.cols		= 8,

	.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 = {

static struct platform_device *smdkc100_devices[] __initdata = {

	&s3c_device_adc,

	&s3c_device_adc,

	&s3c_device_cfcon,

	&s3c_device_cfcon,
@@ -200,6 +239,8 @@ static struct platform_device *smdkc100_devices[] __initdata = { 
	&s5p_device_fimc1,

	&s5p_device_fimc1,

	&s5p_device_fimc2,

	&s5p_device_fimc2,

	&s5pc100_device_spdif,

	&s5pc100_device_spdif,

	&s3c_device_timer[0],

	&smdkc100_backlight_device,

};

};





static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {

static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
@@ -233,7 +274,6 @@ static void __init smdkc100_machine_init(void) 
	s5pc100_spdif_setup_gpio(S5PC100_SPDIF_GPD);

	s5pc100_spdif_setup_gpio(S5PC100_SPDIF_GPD);





	/* LCD init */

	/* LCD init */

	gpio_request(S5PC100_GPD(0), "GPD");

	gpio_request(S5PC100_GPH0(6), "GPH0");

	gpio_request(S5PC100_GPH0(6), "GPH0");

	smdkc100_lcd_power_set(&smdkc100_lcd_power_data, 0);

	smdkc100_lcd_power_set(&smdkc100_lcd_power_data, 0);

	platform_add_devices(smdkc100_devices, ARRAY_SIZE(smdkc100_devices));

	platform_add_devices(smdkc100_devices, ARRAY_SIZE(smdkc100_devices));