drivers/leds/leds-rt8547.c - LeafOS-Devices/android_kernel_samsung_universal7904 - Gitiles

 /*
  * LED driver - leds-rt8547.c
  *
  * Copyright (C) 2016 Younghoon Joo <yhoon.joo@samsung.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/pwm.h>
 #include <linux/vmalloc.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
 #include <linux/leds-rt8547.h>
 #ifdef CONFIG_OF
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #endif

 extern struct class *camera_class; /*sys/class/camera*/
 struct device *rt8547_dev;

 struct rt8547_platform_data *global_rt8547data;
 struct device *global_dev;

 bool assistive_light = false;

 void rt8547_setGpio(int onoff)
 {
 	if (onoff) {
 		gpio_direction_output(global_rt8547data->flash_control, 1);
 		gpio_direction_output(global_rt8547data->flash_en, 1);
 	} else {
 		gpio_direction_output(global_rt8547data->flash_control, 0);
 		gpio_direction_output(global_rt8547data->flash_en, 0);
 	}
 }

 void rt8547_set_low_bit(void)
 {
 	gpio_direction_output(global_rt8547data->flash_control, 0);
 	udelay(T_LONG);
 	gpio_direction_output(global_rt8547data->flash_control, 1);
 	udelay(T_SHORT);
 }

 void rt8547_set_high_bit(void)
 {
 	gpio_direction_output(global_rt8547data->flash_control, 0);
 	udelay(T_SHORT);
 	gpio_direction_output(global_rt8547data->flash_control, 1);
 	udelay(T_LONG);
 }

 static int rt8547_set_bit(unsigned int bit)
 {
 	if (bit) {
 		rt8547_set_high_bit();
 	} else {
 		rt8547_set_low_bit();
 	}

 	return 0;
 }

 static int rt8547_write_one_wire_data(unsigned int data, unsigned int len)
 {
 	int i = 0;

 	for ( i = len-1; i >= 0; i--) {
 		rt8547_set_bit((data >> i) & 0x01);
 	}

 	return 0;
 }

 static int rt8547_write_data(unsigned int regAddr, unsigned int data)
 {
 	int err = 0;

 	gpio_direction_output(global_rt8547data->flash_control, 1);
 	udelay(T_SOD);

 	/* Write Slave Address */
 	rt8547_write_one_wire_data(RT8547_SLAVE_ADDR, 8);

 	/* Write Reg Address */
 	rt8547_write_one_wire_data(regAddr, 3);

 	/* Write Data */
 	rt8547_write_one_wire_data(data, 8);

 	/* Data End Condition */
 	gpio_direction_output(global_rt8547data->flash_control, 0);
 	udelay(T_SHORT);
 	gpio_direction_output(global_rt8547data->flash_control, 1);
 	udelay(T_EOD);

 	return err;
 }

 ssize_t rt8547_store(struct device *dev,
 			struct device_attribute *attr, const char *buf,
 			size_t count)
 {
 	int value = 0;
 	int ret = 0;
 	int torch_step = 0;
 	unsigned long flags = 0;

 	if ((buf == NULL) || kstrtouint(buf, 10, &value)) {
 		return -1;
 	}

 	global_rt8547data->sysfs_input_data = value;

 	ret = gpio_request(global_rt8547data->flash_control, "rt8547_led_control");
 	if (ret) {
 		LED_ERROR("Failed to requeset rt8547_led_control\n");
 		return ret;
 	}

 	ret = gpio_request(global_rt8547data->flash_en, "rt8547_led_en");
 	if (ret) {
 		LED_ERROR("Failed to requeset rt8547_led_en\n");
 		return ret;
 	}

 	if (value <= 0) {
 		LED_INFO("RT8547-TORCH OFF. : E(%d)\n", value);
 		assistive_light = false;
 		global_rt8547data->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;

 		spin_lock_irqsave(&global_rt8547data->int_lock, flags);
 		rt8547_setGpio(0);
 		spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

 		LED_INFO("RT8547-TORCH OFF. : X(%d)\n", value);
 	} else {
 		LED_INFO("RT8547-TORCH ON. : E(%d)\n", value);
 		assistive_light = true;
 		global_rt8547data->mode_status = RT8547_ENABLE_MOVIE_MODE;
 		spin_lock_irqsave(&global_rt8547data->int_lock, flags);
 		rt8547_write_data(RT8547_ADDR_LVP_SETTING, RT8547_3V);
 		if (value == 100) {
 			rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
 				global_rt8547data->factory_current_value | RT8547_TORCH_SELECT);
 		} else if ((1001 <= value) && (value <= 1010)) {
 			/* (value) 1001, 1002, 1004, 1006, 1009
 			: (torch_step) 1(50mA), 2(75mA), 4(125mA), 9(200mA), 10(275mA) */
 			if (value <= 1001)
 				torch_step = 1;
 			else if (value <= 1002)
 				torch_step = 2;
 			else if (value <= 1004)
 				torch_step = 4;
 			else if (value <= 1006)
 				torch_step = 9;
 			else if (value <= 1009)
 				torch_step = 10;
 			else
 				torch_step = 2;

 			rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
 				torch_step | RT8547_TORCH_SELECT);
 			LED_INFO("torch current enum(%d) : %d mA\n", torch_step, torch_step * 25 + 25);
 		} else {
 			rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
 				global_rt8547data->movie_current_value | RT8547_TORCH_SELECT);
 			LED_INFO("global_rt8547data->movie_current_value(%d)\n",
 				global_rt8547data->movie_current_value);
 		}
 		rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
 			(RT8547_TIMEOUT_CURRENT_400mA << 5) | RT8547_FLASH_CURRENT_150mA);
 		rt8547_write_data(RT8547_ADDR_FLASH_TIMEOUT_SETTING, RT8547_TIMER_1216ms);

 		gpio_direction_output(global_rt8547data->flash_en, 1);
 		spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

 		LED_INFO("RT8547-TORCH ON. : X(%d)\n", value);
 	}

 	gpio_free(global_rt8547data->flash_control);
 	gpio_free(global_rt8547data->flash_en);

 	return count;
 }

 EXPORT_SYMBOL(rt8547_led_mode_ctrl);

 int32_t rt8547_led_mode_ctrl(int state)
 {
 	int ret = 0;
 	unsigned long flags = 0;

 	if (assistive_light == true) {
 		LED_INFO(" assistive_light is enabled \n");
 		return 0;
 	}

 	ret = gpio_request(global_rt8547data->flash_control, "rt8547_led_control");
 	if (ret) {
 		LED_ERROR("Failed to request rt8547_led_mode_ctrl\n");
 		return ret;
 	}

 	switch(state) {
 		case RT8547_ENABLE_PRE_FLASH_MODE:
 			/* FlashLight Mode Pre Flash */
 			LED_INFO("RT8547-Pre Flash ON E(%d)\n", state);
 			global_rt8547data->mode_status = RT8547_ENABLE_PRE_FLASH_MODE;
 			spin_lock_irqsave(&global_rt8547data->int_lock, flags);
 			rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage);
 			rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
 								global_rt8547data->pre_current_value|RT8547_TORCH_SELECT);
 			rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
 				(RT8547_TIMEOUT_CURRENT_400mA << 5) | RT8547_FLASH_CURRENT_150mA);
 			spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

 			LED_INFO("RT8547-Pre Flash ON X(%d)\n", state);
 			break;
 		case RT8547_ENABLE_MOVIE_MODE:
 			/* FlashLight Mode TORCH */
 			LED_INFO("RT8547-TORCH ON E(%d)\n", state);
 			global_rt8547data->mode_status = RT8547_ENABLE_MOVIE_MODE;
 			spin_lock_irqsave(&global_rt8547data->int_lock, flags);
 			rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage);
 			rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
 						global_rt8547data->movie_current_value|RT8547_TORCH_SELECT);
 			rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
 				(RT8547_TIMEOUT_CURRENT_400mA << 5) | RT8547_FLASH_CURRENT_150mA);
 			spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
 			LED_INFO("RT8547-TORCH ON X(%d)\n", state);
 			break;
 		case RT8547_ENABLE_FLASH_MODE:
 			/* FlashLight Mode Flash */
 			LED_INFO("RT8547-FLASH ON E(%d)\n", state);
 			global_rt8547data->mode_status = RT8547_ENABLE_FLASH_MODE;
 			spin_lock_irqsave(&global_rt8547data->int_lock, flags);
 			rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage); // LVP setting
 			rt8547_write_data(RT8547_ADDR_CURRENT_SETTING, RT8547_STROBE_SELECT); // Strobe select
 			rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
 				(RT8547_TIMEOUT_CURRENT_400mA << 5) | global_rt8547data->flash_current_value);
 			spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
 			LED_INFO("RT8547-FLASH ON X(%d)\n", state);
 			break;
 		case RT8547_DISABLES_MOVIE_FLASH_MODE:
 		default:
 			/* FlashLight Mode OFF */
 			LED_INFO("RT8547-FLASH OFF E(%d)\n", state);
 			global_rt8547data->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;
 			spin_lock_irqsave(&global_rt8547data->int_lock, flags);
 			rt8547_setGpio(0);
 			spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

 			LED_INFO("RT8547-FLASH OFF X(%d)\n", state);
 			break;
 	}

 	gpio_free(global_rt8547data->flash_control);

 	return ret;
 }

 ssize_t rt8547_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	return sprintf(buf, "%d\n", global_rt8547data->sysfs_input_data);
 }

 static DEVICE_ATTR(rear_flash, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH,
 	rt8547_show, rt8547_store);
 static DEVICE_ATTR(rear_torch_flash, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH,
 	rt8547_show, rt8547_store);

 static int rt8547_parse_dt(struct device *dev,
                                 struct rt8547_platform_data *pdata)
 {
 	struct device_node *dnode = dev->of_node;
 	u32 buffer = 0;
 	int ret = 0;

 	/* Defulat Value */
 	pdata->LVP_Voltage = RT8547_3V;
 	pdata->flash_timeout = RT8547_TIMER_992ms;
 	pdata->timeout_current_value = RT8547_TIMEOUT_CURRENT_350mA;
 	pdata->flash_current_value = RT8547_FLASH_CURRENT_1500mA;
 	pdata->movie_current_value = RT8547_MOVIE_CURRENT_200mA;
 	pdata->pre_current_value = RT8547_MOVIE_CURRENT_275mA;
 	pdata->factory_current_value = RT8547_MOVIE_CURRENT_400mA;
 	pdata->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;

 	/* get gpio */
 	pdata->flash_control = of_get_named_gpio(dnode, "flash_control", 0);
 	if (!gpio_is_valid(pdata->flash_control)) {
 		dev_err(dev, "failed to get flash_control\n");
 		return -1;
 	}

 	pdata->flash_en = of_get_named_gpio(dnode, "flash_en", 0);
 	if (!gpio_is_valid(pdata->flash_en)) {
 		dev_err(dev, "failed to get flash_en\n");
 		return -1;
 	}

 	/* get flash current value */
 	if (of_property_read_u32(dnode, "flash_current", &buffer) == 0) {
 		dev_info(dev, "flash_current = <%d><%d>\n", buffer,RT8547_FLASH_CURRENT(buffer)&0x1F);
 		pdata->flash_current_value = RT8547_FLASH_CURRENT(buffer)&0x1F;
 	}

 	/* get movie current value */
 	if (of_property_read_u32(dnode, "movie_current", &buffer) == 0) {
 		dev_info(dev, "movie_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
 		pdata->movie_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
 	}

 	/* get factory current value */
 	if (of_property_read_u32(dnode, "factory_current", &buffer) == 0) {
 		dev_info(dev, "factory_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
 		pdata->factory_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
 	}

 	/* get pre current value */
 	if (of_property_read_u32(dnode, "pre_current", &buffer) == 0) {
 		dev_info(dev, "pre_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
 		pdata->pre_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
 	}

 	return ret;
 }

 static int rt8547_probe(struct platform_device *pdev)
 {
 	struct rt8547_platform_data *pdata;
 	int ret = 0;

 	if (pdev->dev.of_node) {
 		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 		if (!pdata) {
 			dev_err(&pdev->dev, "Failed to allocate memory\n");
 			return -ENOMEM;
 		}
 		ret = rt8547_parse_dt(&pdev->dev, pdata);
 		if (ret < 0) {
 			return -EFAULT;
 		}
 	} else {
 	pdata = pdev->dev.platform_data;
 		if (pdata == NULL) {
 			return -EFAULT;
 		}
 	}

 	global_rt8547data = pdata;
 	global_dev = &pdev->dev;

 	LED_INFO("RT8547_LED Probe\n");

 	gpio_request_one(global_rt8547data->flash_control, GPIOF_OUT_INIT_LOW, "rt8547_led_control");
 	gpio_request_one(global_rt8547data->flash_en, GPIOF_OUT_INIT_LOW, "rt8547_led_en");
 	gpio_free(global_rt8547data->flash_control);
 	gpio_free(global_rt8547data->flash_en);

 	rt8547_dev = device_create(camera_class, NULL, 0, NULL, "flash");
 	if (IS_ERR(rt8547_dev)) {
 		LED_ERROR("Failed to create device(flash)!\n");
 	}

 	if (device_create_file(rt8547_dev, &dev_attr_rear_flash) < 0) {
 		LED_ERROR("failed to create device file, %s\n",
 				dev_attr_rear_flash.attr.name);
 	}
 	if (device_create_file(rt8547_dev, &dev_attr_rear_torch_flash) < 0) {
 		LED_ERROR("failed to create device file, %s\n",
 				dev_attr_rear_torch_flash.attr.name);
 	}
 	spin_lock_init(&pdata->int_lock);

 	return 0;
 }
 static int rt8547_remove(struct platform_device *pdev)
 {
 	device_remove_file(rt8547_dev, &dev_attr_rear_flash);
 	device_remove_file(rt8547_dev, &dev_attr_rear_torch_flash);
 	device_destroy(camera_class, 0);
 	class_destroy(camera_class);

 	return 0;
 }

 #ifdef CONFIG_OF
 static struct of_device_id rt8547_dt_ids[] = {
 	{ .compatible = "rt8547",},
 	{},
 };
 /*MODULE_DEVICE_TABLE(of, rt8547_dt_ids);*/
 #endif

 static struct platform_driver rt8547_driver = {
 	.driver = {
 		   .name = rt8547_NAME,
 		   .owner = THIS_MODULE,
 #ifdef CONFIG_OF
 		   .of_match_table = rt8547_dt_ids,
 #endif
 		   },
 	.probe = rt8547_probe,
 	.remove = rt8547_remove,
 };

 static int __init rt8547_init(void)
 {
 	return platform_driver_register(&rt8547_driver);
 }

 static void __exit rt8547_exit(void)
 {
 	platform_driver_unregister(&rt8547_driver);
 }

 module_init(rt8547_init);
 module_exit(rt8547_exit);

 MODULE_AUTHOR("younghoon joo <yhoon.joo@samsung.com.com>");
 MODULE_DESCRIPTION("RT8547 driver");
 MODULE_LICENSE("GPL");
	/*
	* LED driver - leds-rt8547.c
	*
	* Copyright (C) 2016 Younghoon Joo <yhoon.joo@samsung.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/pwm.h>
	#include <linux/vmalloc.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <linux/gpio.h>
	#include <linux/leds-rt8547.h>
	#ifdef CONFIG_OF
	#include <linux/of.h>
	#include <linux/of_gpio.h>
	#endif

	extern struct class camera_class; /sys/class/camera*/
	struct device *rt8547_dev;

	struct rt8547_platform_data *global_rt8547data;
	struct device *global_dev;

	bool assistive_light = false;

	void rt8547_setGpio(int onoff)
	{
	if (onoff) {
	gpio_direction_output(global_rt8547data->flash_control, 1);
	gpio_direction_output(global_rt8547data->flash_en, 1);
	} else {
	gpio_direction_output(global_rt8547data->flash_control, 0);
	gpio_direction_output(global_rt8547data->flash_en, 0);
	}
	}

	void rt8547_set_low_bit(void)
	{
	gpio_direction_output(global_rt8547data->flash_control, 0);
	udelay(T_LONG);
	gpio_direction_output(global_rt8547data->flash_control, 1);
	udelay(T_SHORT);
	}

	void rt8547_set_high_bit(void)
	{
	gpio_direction_output(global_rt8547data->flash_control, 0);
	udelay(T_SHORT);
	gpio_direction_output(global_rt8547data->flash_control, 1);
	udelay(T_LONG);
	}

	static int rt8547_set_bit(unsigned int bit)
	{
	if (bit) {
	rt8547_set_high_bit();
	} else {
	rt8547_set_low_bit();
	}

	return 0;
	}

	static int rt8547_write_one_wire_data(unsigned int data, unsigned int len)
	{
	int i = 0;

	for ( i = len-1; i >= 0; i--) {
	rt8547_set_bit((data >> i) & 0x01);
	}

	return 0;
	}

	static int rt8547_write_data(unsigned int regAddr, unsigned int data)
	{
	int err = 0;

	gpio_direction_output(global_rt8547data->flash_control, 1);
	udelay(T_SOD);

	/* Write Slave Address */
	rt8547_write_one_wire_data(RT8547_SLAVE_ADDR, 8);

	/* Write Reg Address */
	rt8547_write_one_wire_data(regAddr, 3);

	/* Write Data */
	rt8547_write_one_wire_data(data, 8);

	/* Data End Condition */
	gpio_direction_output(global_rt8547data->flash_control, 0);
	udelay(T_SHORT);
	gpio_direction_output(global_rt8547data->flash_control, 1);
	udelay(T_EOD);

	return err;
	}

	ssize_t rt8547_store(struct device *dev,
	struct device_attribute attr, const char buf,
	size_t count)
	{
	int value = 0;
	int ret = 0;
	int torch_step = 0;
	unsigned long flags = 0;

	if ((buf == NULL) \|\| kstrtouint(buf, 10, &value)) {
	return -1;
	}

	global_rt8547data->sysfs_input_data = value;

	ret = gpio_request(global_rt8547data->flash_control, "rt8547_led_control");
	if (ret) {
	LED_ERROR("Failed to requeset rt8547_led_control\n");
	return ret;
	}

	ret = gpio_request(global_rt8547data->flash_en, "rt8547_led_en");
	if (ret) {
	LED_ERROR("Failed to requeset rt8547_led_en\n");
	return ret;
	}

	if (value <= 0) {
	LED_INFO("RT8547-TORCH OFF. : E(%d)\n", value);
	assistive_light = false;
	global_rt8547data->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;

	spin_lock_irqsave(&global_rt8547data->int_lock, flags);
	rt8547_setGpio(0);
	spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

	LED_INFO("RT8547-TORCH OFF. : X(%d)\n", value);
	} else {
	LED_INFO("RT8547-TORCH ON. : E(%d)\n", value);
	assistive_light = true;
	global_rt8547data->mode_status = RT8547_ENABLE_MOVIE_MODE;
	spin_lock_irqsave(&global_rt8547data->int_lock, flags);
	rt8547_write_data(RT8547_ADDR_LVP_SETTING, RT8547_3V);
	if (value == 100) {
	rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
	global_rt8547data->factory_current_value \| RT8547_TORCH_SELECT);
	} else if ((1001 <= value) && (value <= 1010)) {
	/* (value) 1001, 1002, 1004, 1006, 1009
	: (torch_step) 1(50mA), 2(75mA), 4(125mA), 9(200mA), 10(275mA) */
	if (value <= 1001)
	torch_step = 1;
	else if (value <= 1002)
	torch_step = 2;
	else if (value <= 1004)
	torch_step = 4;
	else if (value <= 1006)
	torch_step = 9;
	else if (value <= 1009)
	torch_step = 10;
	else
	torch_step = 2;

	rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
	torch_step \| RT8547_TORCH_SELECT);
	LED_INFO("torch current enum(%d) : %d mA\n", torch_step, torch_step * 25 + 25);
	} else {
	rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
	global_rt8547data->movie_current_value \| RT8547_TORCH_SELECT);
	LED_INFO("global_rt8547data->movie_current_value(%d)\n",
	global_rt8547data->movie_current_value);
	}
	rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
	(RT8547_TIMEOUT_CURRENT_400mA << 5) \| RT8547_FLASH_CURRENT_150mA);
	rt8547_write_data(RT8547_ADDR_FLASH_TIMEOUT_SETTING, RT8547_TIMER_1216ms);

	gpio_direction_output(global_rt8547data->flash_en, 1);
	spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

	LED_INFO("RT8547-TORCH ON. : X(%d)\n", value);
	}

	gpio_free(global_rt8547data->flash_control);
	gpio_free(global_rt8547data->flash_en);

	return count;
	}

	EXPORT_SYMBOL(rt8547_led_mode_ctrl);

	int32_t rt8547_led_mode_ctrl(int state)
	{
	int ret = 0;
	unsigned long flags = 0;

	if (assistive_light == true) {
	LED_INFO(" assistive_light is enabled \n");
	return 0;
	}

	ret = gpio_request(global_rt8547data->flash_control, "rt8547_led_control");
	if (ret) {
	LED_ERROR("Failed to request rt8547_led_mode_ctrl\n");
	return ret;
	}

	switch(state) {
	case RT8547_ENABLE_PRE_FLASH_MODE:
	/* FlashLight Mode Pre Flash */
	LED_INFO("RT8547-Pre Flash ON E(%d)\n", state);
	global_rt8547data->mode_status = RT8547_ENABLE_PRE_FLASH_MODE;
	spin_lock_irqsave(&global_rt8547data->int_lock, flags);
	rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage);
	rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
	global_rt8547data->pre_current_value\|RT8547_TORCH_SELECT);
	rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
	(RT8547_TIMEOUT_CURRENT_400mA << 5) \| RT8547_FLASH_CURRENT_150mA);
	spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

	LED_INFO("RT8547-Pre Flash ON X(%d)\n", state);
	break;
	case RT8547_ENABLE_MOVIE_MODE:
	/* FlashLight Mode TORCH */
	LED_INFO("RT8547-TORCH ON E(%d)\n", state);
	global_rt8547data->mode_status = RT8547_ENABLE_MOVIE_MODE;
	spin_lock_irqsave(&global_rt8547data->int_lock, flags);
	rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage);
	rt8547_write_data(RT8547_ADDR_CURRENT_SETTING,
	global_rt8547data->movie_current_value\|RT8547_TORCH_SELECT);
	rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
	(RT8547_TIMEOUT_CURRENT_400mA << 5) \| RT8547_FLASH_CURRENT_150mA);
	spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
	LED_INFO("RT8547-TORCH ON X(%d)\n", state);
	break;
	case RT8547_ENABLE_FLASH_MODE:
	/* FlashLight Mode Flash */
	LED_INFO("RT8547-FLASH ON E(%d)\n", state);
	global_rt8547data->mode_status = RT8547_ENABLE_FLASH_MODE;
	spin_lock_irqsave(&global_rt8547data->int_lock, flags);
	rt8547_write_data(RT8547_ADDR_LVP_SETTING, global_rt8547data->LVP_Voltage); // LVP setting
	rt8547_write_data(RT8547_ADDR_CURRENT_SETTING, RT8547_STROBE_SELECT); // Strobe select
	rt8547_write_data(RT8547_ADDR_FLASH_CURRENT_LEVEL_TIMEOUT_SETTING,
	(RT8547_TIMEOUT_CURRENT_400mA << 5) \| global_rt8547data->flash_current_value);
	spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);
	LED_INFO("RT8547-FLASH ON X(%d)\n", state);
	break;
	case RT8547_DISABLES_MOVIE_FLASH_MODE:
	default:
	/* FlashLight Mode OFF */
	LED_INFO("RT8547-FLASH OFF E(%d)\n", state);
	global_rt8547data->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;
	spin_lock_irqsave(&global_rt8547data->int_lock, flags);
	rt8547_setGpio(0);
	spin_unlock_irqrestore(&global_rt8547data->int_lock, flags);

	LED_INFO("RT8547-FLASH OFF X(%d)\n", state);
	break;
	}

	gpio_free(global_rt8547data->flash_control);

	return ret;
	}

	ssize_t rt8547_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	return sprintf(buf, "%d\n", global_rt8547data->sysfs_input_data);
	}

	static DEVICE_ATTR(rear_flash, S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IWGRP\|S_IROTH,
	rt8547_show, rt8547_store);
	static DEVICE_ATTR(rear_torch_flash, S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IWGRP\|S_IROTH,
	rt8547_show, rt8547_store);

	static int rt8547_parse_dt(struct device *dev,
	struct rt8547_platform_data *pdata)
	{
	struct device_node *dnode = dev->of_node;
	u32 buffer = 0;
	int ret = 0;

	/* Defulat Value */
	pdata->LVP_Voltage = RT8547_3V;
	pdata->flash_timeout = RT8547_TIMER_992ms;
	pdata->timeout_current_value = RT8547_TIMEOUT_CURRENT_350mA;
	pdata->flash_current_value = RT8547_FLASH_CURRENT_1500mA;
	pdata->movie_current_value = RT8547_MOVIE_CURRENT_200mA;
	pdata->pre_current_value = RT8547_MOVIE_CURRENT_275mA;
	pdata->factory_current_value = RT8547_MOVIE_CURRENT_400mA;
	pdata->mode_status = RT8547_DISABLES_MOVIE_FLASH_MODE;

	/* get gpio */
	pdata->flash_control = of_get_named_gpio(dnode, "flash_control", 0);
	if (!gpio_is_valid(pdata->flash_control)) {
	dev_err(dev, "failed to get flash_control\n");
	return -1;
	}

	pdata->flash_en = of_get_named_gpio(dnode, "flash_en", 0);
	if (!gpio_is_valid(pdata->flash_en)) {
	dev_err(dev, "failed to get flash_en\n");
	return -1;
	}

	/* get flash current value */
	if (of_property_read_u32(dnode, "flash_current", &buffer) == 0) {
	dev_info(dev, "flash_current = <%d><%d>\n", buffer,RT8547_FLASH_CURRENT(buffer)&0x1F);
	pdata->flash_current_value = RT8547_FLASH_CURRENT(buffer)&0x1F;
	}

	/* get movie current value */
	if (of_property_read_u32(dnode, "movie_current", &buffer) == 0) {
	dev_info(dev, "movie_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
	pdata->movie_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
	}

	/* get factory current value */
	if (of_property_read_u32(dnode, "factory_current", &buffer) == 0) {
	dev_info(dev, "factory_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
	pdata->factory_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
	}

	/* get pre current value */
	if (of_property_read_u32(dnode, "pre_current", &buffer) == 0) {
	dev_info(dev, "pre_current = <%d><%d>\n", buffer, RT8547_MOVIE_CURRENT(buffer)&0x0F);
	pdata->pre_current_value = RT8547_MOVIE_CURRENT(buffer)&0x0F;
	}

	return ret;
	}

	static int rt8547_probe(struct platform_device *pdev)
	{
	struct rt8547_platform_data *pdata;
	int ret = 0;

	if (pdev->dev.of_node) {
	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata) {
	dev_err(&pdev->dev, "Failed to allocate memory\n");
	return -ENOMEM;
	}
	ret = rt8547_parse_dt(&pdev->dev, pdata);
	if (ret < 0) {
	return -EFAULT;
	}
	} else {
	pdata = pdev->dev.platform_data;
	if (pdata == NULL) {
	return -EFAULT;
	}
	}

	global_rt8547data = pdata;
	global_dev = &pdev->dev;

	LED_INFO("RT8547_LED Probe\n");

	gpio_request_one(global_rt8547data->flash_control, GPIOF_OUT_INIT_LOW, "rt8547_led_control");
	gpio_request_one(global_rt8547data->flash_en, GPIOF_OUT_INIT_LOW, "rt8547_led_en");
	gpio_free(global_rt8547data->flash_control);
	gpio_free(global_rt8547data->flash_en);

	rt8547_dev = device_create(camera_class, NULL, 0, NULL, "flash");
	if (IS_ERR(rt8547_dev)) {
	LED_ERROR("Failed to create device(flash)!\n");
	}

	if (device_create_file(rt8547_dev, &dev_attr_rear_flash) < 0) {
	LED_ERROR("failed to create device file, %s\n",
	dev_attr_rear_flash.attr.name);
	}
	if (device_create_file(rt8547_dev, &dev_attr_rear_torch_flash) < 0) {
	LED_ERROR("failed to create device file, %s\n",
	dev_attr_rear_torch_flash.attr.name);
	}
	spin_lock_init(&pdata->int_lock);

	return 0;
	}
	static int rt8547_remove(struct platform_device *pdev)
	{
	device_remove_file(rt8547_dev, &dev_attr_rear_flash);
	device_remove_file(rt8547_dev, &dev_attr_rear_torch_flash);
	device_destroy(camera_class, 0);
	class_destroy(camera_class);

	return 0;
	}

	#ifdef CONFIG_OF
	static struct of_device_id rt8547_dt_ids[] = {
	{ .compatible = "rt8547",},
	{},
	};
	/MODULE_DEVICE_TABLE(of, rt8547_dt_ids);/
	#endif

	static struct platform_driver rt8547_driver = {
	.driver = {
	.name = rt8547_NAME,
	.owner = THIS_MODULE,
	#ifdef CONFIG_OF
	.of_match_table = rt8547_dt_ids,
	#endif
	},
	.probe = rt8547_probe,
	.remove = rt8547_remove,
	};

	static int __init rt8547_init(void)
	{
	return platform_driver_register(&rt8547_driver);
	}

	static void __exit rt8547_exit(void)
	{
	platform_driver_unregister(&rt8547_driver);
	}

	module_init(rt8547_init);
	module_exit(rt8547_exit);

	MODULE_AUTHOR("younghoon joo <yhoon.joo@samsung.com.com>");
	MODULE_DESCRIPTION("RT8547 driver");
	MODULE_LICENSE("GPL");