Release 4.7 drivers/leds/leds-bd2802.c

Directory: drivers/leds
/*
 * leds-bd2802.c - RGB LED Driver
 *
 * Copyright (C) 2009 Samsung Electronics
 * Kim Kyuwon <q1.kim@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.
 *
 * Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf
 *
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/leds-bd2802.h>
#include <linux/slab.h>
#include <linux/pm.h>


#define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0))


#define BD2802_LED_OFFSET		0xa

#define BD2802_COLOR_OFFSET		0x3


#define BD2802_REG_CLKSETUP		0x00

#define BD2802_REG_CONTROL		0x01

#define BD2802_REG_HOURSETUP		0x02

#define BD2802_REG_CURRENT1SETUP	0x03

#define BD2802_REG_CURRENT2SETUP	0x04

#define BD2802_REG_WAVEPATTERN		0x05


#define BD2802_CURRENT_032		0x10 
/* 3.2mA */

#define BD2802_CURRENT_000		0x00 
/* 0.0mA */


#define BD2802_PATTERN_FULL		0x07

#define BD2802_PATTERN_HALF		0x03


enum led_ids {
	
LED1,
	
LED2,
	
LED_NUM,
};


enum led_colors {
	
RED,
	
GREEN,
	
BLUE,
};


enum led_bits {
	
BD2802_OFF,
	
BD2802_BLINK,
	
BD2802_ON,
};

/*
 * State '0' : 'off'
 * State '1' : 'blink'
 * State '2' : 'on'.
 */

struct led_state {
	
unsigned r:2;
	
unsigned g:2;
	
unsigned b:2;
};


struct bd2802_led {
	
struct bd2802_led_platform_data	*pdata;
	
struct i2c_client		*client;
	
struct rw_semaphore		rwsem;

	
struct led_state		led[2];

	/*
         * Making led_classdev as array is not recommended, because array
         * members prevent using 'container_of' macro. So repetitive works
         * are needed.
         */
	
struct led_classdev		cdev_led1r;
	
struct led_classdev		cdev_led1g;
	
struct led_classdev		cdev_led1b;
	
struct led_classdev		cdev_led2r;
	
struct led_classdev		cdev_led2g;
	
struct led_classdev		cdev_led2b;

	/*
         * Advanced Configuration Function(ADF) mode:
         * In ADF mode, user can set registers of BD2802GU directly,
         * therefore BD2802GU doesn't enter reset state.
         */
	
int				adf_on;

	
enum led_ids			led_id;
	
enum led_colors			color;
	
enum led_bits			state;

	/* General attributes of RGB LEDs */
	
int				wave_pattern;
	
int				rgb_current;
};


/*--------------------------------------------------------------*/
/*      BD2802GU helper functions                                       */
/*--------------------------------------------------------------*/



static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id,
							enum led_colors color)
{
	switch (color) {
	case RED:
		return !led->led[id].r;
	case GREEN:
		return !led->led[id].g;
	case BLUE:
		return !led->led[id].b;
	default:
		dev_err(&led->client->dev, "%s: Invalid color\n", __func__);
		return -EINVAL;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 87 100.00% 1 100.00%
Total 87 100.00% 1 100.00%



static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id)
{
	if (led->led[id].r || led->led[id].g || led->led[id].b)
		return 0;

	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 51 100.00% 1 100.00%
Total 51 100.00% 1 100.00%



static inline int bd2802_is_all_off(struct bd2802_led *led)
{
	int i;

	for (i = 0; i < LED_NUM; i++)
		if (!bd2802_is_led_off(led, i))
			return 0;

	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%



static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color)
{
	return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color,
								u8 reg_offset)
{
	return reg_offset + bd2802_get_base_offset(id, color);
}


Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%

/*--------------------------------------------------------------*/
/*      BD2802GU core functions                                 */
/*--------------------------------------------------------------*/



static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val)
{
	int ret = i2c_smbus_write_byte_data(client, reg, val);
	if (ret >= 0)
		return 0;

	dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
						__func__, reg, val, ret);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 59 100.00% 1 100.00%
Total 59 100.00% 1 100.00%



static void bd2802_update_state(struct bd2802_led *led, enum led_ids id,
				enum led_colors color, enum led_bits led_bit)
{
	int i;
	u8 value;

	for (i = 0; i < LED_NUM; i++) {
		if (i == id) {
			switch (color) {
			case RED:
				led->led[i].r = led_bit;
				break;
			case GREEN:
				led->led[i].g = led_bit;
				break;
			case BLUE:
				led->led[i].b = led_bit;
				break;
			default:
				dev_err(&led->client->dev,
					"%s: Invalid color\n", __func__);
				return;
			}
		}
	}

	if (led_bit == BD2802_BLINK || led_bit == BD2802_ON)
		return;

	if (!bd2802_is_led_off(led, id))
		return;

	if (bd2802_is_all_off(led) && !led->adf_on) {
		gpio_set_value(led->pdata->reset_gpio, 0);
		return;
	}

	/*
         * In this case, other led is turned on, and current led is turned
         * off. So set RGB LED Control register to stop the current RGB LED
         */
	value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1);
	bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 201 100.00% 1 100.00%
Total 201 100.00% 1 100.00%



static void bd2802_configure(struct bd2802_led *led)
{
	struct bd2802_led_platform_data *pdata = led->pdata;
	u8 reg;

	reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP);
	bd2802_write_byte(led->client, reg, pdata->rgb_time);

	reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP);
	bd2802_write_byte(led->client, reg, pdata->rgb_time);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 71 100.00% 1 100.00%
Total 71 100.00% 1 100.00%



static void bd2802_reset_cancel(struct bd2802_led *led)
{
	gpio_set_value(led->pdata->reset_gpio, 1);
	udelay(100);
	bd2802_configure(led);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%



static void bd2802_enable(struct bd2802_led *led, enum led_ids id)
{
	enum led_ids other_led = (id == LED1) ? LED2 : LED1;
	u8 value, other_led_on;

	other_led_on = !bd2802_is_led_off(led, other_led);
	if (id == LED1)
		value = LED_CTL(other_led_on, 1);
	else
		value = LED_CTL(1 , other_led_on);

	bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%



static void bd2802_set_on(struct bd2802_led *led, enum led_ids id,
							enum led_colors color)
{
	u8 reg;

	if (bd2802_is_all_off(led) && !led->adf_on)
		bd2802_reset_cancel(led);

	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
	bd2802_write_byte(led->client, reg, led->rgb_current);
	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
	bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
	reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
	bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL);

	bd2802_enable(led, id);
	bd2802_update_state(led, id, color, BD2802_ON);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 125 100.00% 2 100.00%
Total 125 100.00% 2 100.00%



static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id,
							enum led_colors color)
{
	u8 reg;

	if (bd2802_is_all_off(led) && !led->adf_on)
		bd2802_reset_cancel(led);

	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
	bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
	bd2802_write_byte(led->client, reg, led->rgb_current);
	reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
	bd2802_write_byte(led->client, reg, led->wave_pattern);

	bd2802_enable(led, id);
	bd2802_update_state(led, id, color, BD2802_BLINK);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 127 100.00% 2 100.00%
Total 127 100.00% 2 100.00%



static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id,
				enum led_colors color, enum led_bits led_bit)
{
	if (led_bit == BD2802_OFF) {
		dev_err(&led->client->dev,
					"Only 'blink' and 'on' are allowed\n");
		return;
	}

	if (led_bit == BD2802_BLINK)
		bd2802_set_blink(led, id, color);
	else
		bd2802_set_on(led, id, color);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 69 100.00% 1 100.00%
Total 69 100.00% 1 100.00%



static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id,
							enum led_colors color)
{
	u8 reg;

	if (bd2802_is_rgb_off(led, id, color))
		return;

	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
	bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
	reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
	bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);

	bd2802_update_state(led, id, color, BD2802_OFF);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 89 100.00% 1 100.00%
Total 89 100.00% 1 100.00%


#define BD2802_SET_REGISTER(reg_addr, reg_name)				\
static ssize_t bd2802_store_reg##reg_addr(struct device *dev,           \
        struct device_attribute *attr, const char *buf, size_t count)   \
{                                                                       \
        struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
        unsigned long val;                                              \
        int ret;                                                        \
        if (!count)                                                     \
                return -EINVAL;                                         \
        ret = kstrtoul(buf, 16, &val);                                  \
        if (ret)                                                        \
                return ret;                                             \
        down_write(&led->rwsem);                                        \
        bd2802_write_byte(led->client, reg_addr, (u8) val);             \
        up_write(&led->rwsem);                                          \
        return count;                                                   \
}                                                                       \
static struct device_attribute bd2802_reg##reg_addr##_attr = {          \
        .attr = {.name = reg_name, .mode = 0644},                       \
        .store = bd2802_store_reg##reg_addr,                            \
};

BD2802_SET_REGISTER(0x00, "0x00");
BD2802_SET_REGISTER(0x01, "0x01");
BD2802_SET_REGISTER(0x02, "0x02");
BD2802_SET_REGISTER(0x03, "0x03");
BD2802_SET_REGISTER(0x04, "0x04");
BD2802_SET_REGISTER(0x05, "0x05");
BD2802_SET_REGISTER(0x06, "0x06");
BD2802_SET_REGISTER(0x07, "0x07");
BD2802_SET_REGISTER(0x08, "0x08");
BD2802_SET_REGISTER(0x09, "0x09");
BD2802_SET_REGISTER(0x0a, "0x0a");
BD2802_SET_REGISTER(0x0b, "0x0b");
BD2802_SET_REGISTER(0x0c, "0x0c");
BD2802_SET_REGISTER(0x0d, "0x0d");
BD2802_SET_REGISTER(0x0e, "0x0e");
BD2802_SET_REGISTER(0x0f, "0x0f");
BD2802_SET_REGISTER(0x10, "0x10");
BD2802_SET_REGISTER(0x11, "0x11");
BD2802_SET_REGISTER(0x12, "0x12");
BD2802_SET_REGISTER(0x13, "0x13");
BD2802_SET_REGISTER(0x14, "0x14");
BD2802_SET_REGISTER(0x15, "0x15");


static struct device_attribute *bd2802_addr_attributes[] = {
	&bd2802_reg0x00_attr,
	&bd2802_reg0x01_attr,
	&bd2802_reg0x02_attr,
	&bd2802_reg0x03_attr,
	&bd2802_reg0x04_attr,
	&bd2802_reg0x05_attr,
	&bd2802_reg0x06_attr,
	&bd2802_reg0x07_attr,
	&bd2802_reg0x08_attr,
	&bd2802_reg0x09_attr,
	&bd2802_reg0x0a_attr,
	&bd2802_reg0x0b_attr,
	&bd2802_reg0x0c_attr,
	&bd2802_reg0x0d_attr,
	&bd2802_reg0x0e_attr,
	&bd2802_reg0x0f_attr,
	&bd2802_reg0x10_attr,
	&bd2802_reg0x11_attr,
	&bd2802_reg0x12_attr,
	&bd2802_reg0x13_attr,
	&bd2802_reg0x14_attr,
	&bd2802_reg0x15_attr,
};



static void bd2802_enable_adv_conf(struct bd2802_led *led)
{
	int i, ret;

	for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) {
		ret = device_create_file(&led->client->dev,
						bd2802_addr_attributes[i]);
		if (ret) {
			dev_err(&led->client->dev, "failed: sysfs file %s\n",
					bd2802_addr_attributes[i]->attr.name);
			goto failed_remove_files;
		}
	}

	if (bd2802_is_all_off(led))
		bd2802_reset_cancel(led);

	led->adf_on = 1;

	return;

failed_remove_files:
	for (i--; i >= 0; i--)
		device_remove_file(&led->client->dev,
						bd2802_addr_attributes[i]);
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 129 100.00% 2 100.00%
Total 129 100.00% 2 100.00%



static void bd2802_disable_adv_conf(struct bd2802_led *led)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++)
		device_remove_file(&led->client->dev,
						bd2802_addr_attributes[i]);

	if (bd2802_is_all_off(led))
		gpio_set_value(led->pdata->reset_gpio, 0);

	led->adf_on = 0;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 69 100.00% 1 100.00%
Total 69 100.00% 1 100.00%



static ssize_t bd2802_show_adv_conf(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
	ssize_t ret;

	down_read(&led->rwsem);
	if (led->adf_on)
		ret = sprintf(buf, "on\n");
	else
		ret = sprintf(buf, "off\n");
	up_read(&led->rwsem);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%



static ssize_t bd2802_store_adv_conf(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));

	if (!count)
		return -EINVAL;

	down_write(&led->rwsem);
	if (!led->adf_on && !strncmp(buf, "on", 2))
		bd2802_enable_adv_conf(led);
	else if (led->adf_on && !strncmp(buf, "off", 3))
		bd2802_disable_adv_conf(led);
	up_write(&led->rwsem);

	return count;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 109 100.00% 1 100.00%
Total 109 100.00% 1 100.00%


static struct device_attribute bd2802_adv_conf_attr = {
	.attr = {
		.name = "advanced_configuration",
		.mode = 0644,
        },
	.show = bd2802_show_adv_conf,
	.store = bd2802_store_adv_conf,
};


#define BD2802_CONTROL_ATTR(attr_name, name_str)			\
static ssize_t bd2802_show_##attr_name(struct device *dev,              \
        struct device_attribute *attr, char *buf)                       \
{                                                                       \
        struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
        ssize_t ret;                                                    \
        down_read(&led->rwsem);                                         \
        ret = sprintf(buf, "0x%02x\n", led->attr_name);                 \
        up_read(&led->rwsem);                                           \
        return ret;                                                     \
}                                                                       \
static ssize_t bd2802_store_##attr_name(struct device *dev,             \
        struct device_attribute *attr, const char *buf, size_t count)   \
{                                                                       \
        struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
        unsigned long val;                                              \
        int ret;                                                        \
        if (!count)                                                     \
                return -EINVAL;                                         \
        ret = kstrtoul(buf, 16, &val);                                  \
        if (ret)                                                        \
                return ret;                                             \
        down_write(&led->rwsem);                                        \
        led->attr_name = val;                                           \
        up_write(&led->rwsem);                                          \
        return count;                                                   \
}                                                                       \
static struct device_attribute bd2802_##attr_name##_attr = {            \
        .attr = {                                                       \
                .name = name_str,                                       \
                .mode = 0644,                                           \
        },                                                              \
        .show = bd2802_show_##attr_name,                                \
        .store = bd2802_store_##attr_name,                              \
};

BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");
BD2802_CONTROL_ATTR(rgb_current, "rgb_current");


static struct device_attribute *bd2802_attributes[] = {
	&bd2802_adv_conf_attr,
	&bd2802_wave_pattern_attr,
	&bd2802_rgb_current_attr,
};


#define BD2802_CONTROL_RGBS(name, id, clr)				\
static int bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\
                                        enum led_brightness value)      \
{                                                                       \
        struct bd2802_led *led =                                        \
                container_of(led_cdev, struct bd2802_led, cdev_##name); \
        led->led_id = id;                                               \
        led->color = clr;                                               \
        if (value == LED_OFF) {                                         \
                led->state = BD2802_OFF;                                \
                bd2802_turn_off(led, led->led_id, led->color);          \
        } else {                                                        \
                led->state = BD2802_ON;                                 \
                bd2802_turn_on(led, led->led_id, led->color, BD2802_ON);\
        }                                                               \
        return 0;                                                       \
}                                                                       \
static int bd2802_set_##name##_blink(struct led_classdev *led_cdev,     \
                unsigned long *delay_on, unsigned long *delay_off)      \
{                                                                       \
        struct bd2802_led *led =                                        \
                container_of(led_cdev, struct bd2802_led, cdev_##name); \
        if (*delay_on == 0 || *delay_off == 0)                          \
                return -EINVAL;                                         \
        led->led_id = id;                                               \
        led->color = clr;                                               \
        led->state = BD2802_BLINK;                                      \
        bd2802_turn_on(led, led->led_id, led->color, BD2802_BLINK);     \
        return 0;                                                       \
}

BD2802_CONTROL_RGBS(led1r, LED1, RED);
BD2802_CONTROL_RGBS(led1g, LED1, GREEN);
BD2802_CONTROL_RGBS(led1b, LED1, BLUE);
BD2802_CONTROL_RGBS(led2r, LED2, RED);
BD2802_CONTROL_RGBS(led2g, LED2, GREEN);
BD2802_CONTROL_RGBS(led2b, LED2, BLUE);



static int bd2802_register_led_classdev(struct bd2802_led *led)
{
	int ret;

	led->cdev_led1r.name = "led1_R";
	led->cdev_led1r.brightness = LED_OFF;
	led->cdev_led1r.brightness_set_blocking = bd2802_set_led1r_brightness;
	led->cdev_led1r.blink_set = bd2802_set_led1r_blink;

	ret = led_classdev_register(&led->client->dev, &led->cdev_led1r);
	if (ret < 0) {
		dev_err(&led->client->dev, "couldn't register LED %s\n",
							led->cdev_led1r.name);
		goto failed_unregister_led1_R;
	}

	led->cdev_led1g.name = "led1_G";
	led->cdev_led1g.brightness = LED_OFF;
	led->cdev_led1g.brightness_set_blocking = bd2802_set_led1g_brightness;
	led->cdev_led1g.blink_set = bd2802_set_led1g_blink;

	ret = led_classdev_register(&led->client->dev, &led->cdev_led1g);
	if (ret < 0) {
		dev_err(&led->client->dev, "couldn't register LED %s\n",
							led->cdev_led1g.name);
		goto failed_unregister_led1_G;
	}

	led->cdev_led1b.name = "led1_B";
	led->cdev_led1b.brightness = LED_OFF;
	led->cdev_led1b.brightness_set_blocking = bd2802_set_led1b_brightness;
	led->cdev_led1b.blink_set = bd2802_set_led1b_blink;

	ret = led_classdev_register(&led->client->dev, &led->cdev_led1b);
	if (ret < 0) {
		dev_err(&led->client->dev, "couldn't register LED %s\n",
							led->cdev_led1b.name);
		goto failed_unregister_led1_B;
	}

	led->cdev_led2r.name = "led2_R";
	led->cdev_led2r.brightness = LED_OFF;
	led->cdev_led2r.brightness_set_blocking = bd2802_set_led2r_brightness;
	led->cdev_led2r.blink_set = bd2802_set_led2r_blink;

	ret = led_classdev_register(&led->client->dev, &led->cdev_led2r);
	if (ret < 0) {
		dev_err(&led->client->dev, "couldn't register LED %s\n",
							led->cdev_led2r.name);
		goto failed_unregister_led2_R;
	}

	led->cdev_led2g.name = "led2_G";
	led->cdev_led2g.brightness = LED_OFF;
	led->cdev_led2g.brightness_set_blocking = bd2802_set_led2g_brightness;
	led->cdev_led2g.blink_set = bd2802_set_led2g_blink;

	ret = led_classdev_register(&led->client->dev, &led->cdev_led2g);
	if (ret < 0) {
		dev_err(&led->client->dev, "couldn't register LED %s\n",
							led->cdev_led2g.name);
		goto failed_unregister_led2_G;
	}

	led->cdev_led2b.name = "led2_B";
	led->cdev_led2b.brightness = LED_OFF;
	led->cdev_led2b.brightness_set_blocking = bd2802_set_led2b_brightness;
	led->cdev_led2b.blink_set = bd2802_set_led2b_blink;
	led->cdev_led2b.flags |= LED_CORE_SUSPENDRESUME;

	ret = led_classdev_register(&led->client->dev, &led->cdev_led2b);
	if (ret < 0) {
		dev_err(&led->client->dev, "couldn't register LED %s\n",
							led->cdev_led2b.name);
		goto failed_unregister_led2_B;
	}

	return 0;

failed_unregister_led2_B:
	led_classdev_unregister(&led->cdev_led2g);
failed_unregister_led2_G:
	led_classdev_unregister(&led->cdev_led2r);
failed_unregister_led2_R:
	led_classdev_unregister(&led->cdev_led1b);
failed_unregister_led1_B:
	led_classdev_unregister(&led->cdev_led1g);
failed_unregister_led1_G:
	led_classdev_unregister(&led->cdev_led1r);
failed_unregister_led1_R:

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 542 98.91% 1 50.00%
andrew lunn andrew lunn 6 1.09% 1 50.00%
Total 548 100.00% 2 100.00%



static void bd2802_unregister_led_classdev(struct bd2802_led *led)
{
	led_classdev_unregister(&led->cdev_led2b);
	led_classdev_unregister(&led->cdev_led2g);
	led_classdev_unregister(&led->cdev_led2r);
	led_classdev_unregister(&led->cdev_led1b);
	led_classdev_unregister(&led->cdev_led1g);
	led_classdev_unregister(&led->cdev_led1r);
}

Contributors
Person Tokens Prop Commits CommitProp
axel lin axel lin 39 66.10% 1 50.00%
kim kyuwon kim kyuwon 20 33.90% 1 50.00%
Total 59 100.00% 2 100.00%



static int bd2802_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct bd2802_led *led;
	struct bd2802_led_platform_data *pdata;
	int ret, i;

	led = devm_kzalloc(&client->dev, sizeof(struct bd2802_led), GFP_KERNEL);
	if (!led)
		return -ENOMEM;

	led->client = client;
	pdata = led->pdata = dev_get_platdata(&client->dev);
	i2c_set_clientdata(client, led);

	/* Configure RESET GPIO (L: RESET, H: RESET cancel) */
	gpio_request_one(pdata->reset_gpio, GPIOF_OUT_INIT_HIGH, "RGB_RESETB");

	/* Tacss = min 0.1ms */
	udelay(100);

	/* Detect BD2802GU */
	ret = bd2802_write_byte(client, BD2802_REG_CLKSETUP, 0x00);
	if (ret < 0) {
		dev_err(&client->dev, "failed to detect device\n");
		return ret;
	} else
		dev_info(&client->dev, "return 0x%02x\n", ret);

	/* To save the power, reset BD2802 after detecting */
	gpio_set_value(led->pdata->reset_gpio, 0);

	/* Default attributes */
	led->wave_pattern = BD2802_PATTERN_HALF;
	led->rgb_current = BD2802_CURRENT_032;

	init_rwsem(&led->rwsem);

	for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {
		ret = device_create_file(&led->client->dev,
						bd2802_attributes[i]);
		if (ret) {
			dev_err(&led->client->dev, "failed: sysfs file %s\n",
					bd2802_attributes[i]->attr.name);
			goto failed_unregister_dev_file;
		}
	}

	ret = bd2802_register_led_classdev(led);
	if (ret < 0)
		goto failed_unregister_dev_file;

	return 0;

failed_unregister_dev_file:
	for (i--; i >= 0; i--)
		device_remove_file(&led->client->dev, bd2802_attributes[i]);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 283 94.65% 2 40.00%
bryan wu bryan wu 9 3.01% 1 20.00%
jingoo han jingoo han 4 1.34% 1 20.00%
axel lin axel lin 3 1.00% 1 20.00%
Total 299 100.00% 5 100.00%



static int bd2802_remove(struct i2c_client *client)
{
	struct bd2802_led *led = i2c_get_clientdata(client);
	int i;

	gpio_set_value(led->pdata->reset_gpio, 0);
	bd2802_unregister_led_classdev(led);
	if (led->adf_on)
		bd2802_disable_adv_conf(led);
	for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)
		device_remove_file(&led->client->dev, bd2802_attributes[i]);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 85 100.00% 2 100.00%
Total 85 100.00% 2 100.00%

#ifdef CONFIG_PM_SLEEP


static void bd2802_restore_state(struct bd2802_led *led)
{
	int i;

	for (i = 0; i < LED_NUM; i++) {
		if (led->led[i].r)
			bd2802_turn_on(led, i, RED, led->led[i].r);
		if (led->led[i].g)
			bd2802_turn_on(led, i, GREEN, led->led[i].g);
		if (led->led[i].b)
			bd2802_turn_on(led, i, BLUE, led->led[i].b);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
mark brown mark brown 116 100.00% 1 100.00%
Total 116 100.00% 1 100.00%



static int bd2802_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct bd2802_led *led = i2c_get_clientdata(client);

	gpio_set_value(led->pdata->reset_gpio, 0);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 33 73.33% 1 50.00%
mark brown mark brown 12 26.67% 1 50.00%
Total 45 100.00% 2 100.00%



static int bd2802_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct bd2802_led *led = i2c_get_clientdata(client);

	if (!bd2802_is_all_off(led) || led->adf_on) {
		bd2802_reset_cancel(led);
		bd2802_restore_state(led);
	}

	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 46 79.31% 2 66.67%
mark brown mark brown 12 20.69% 1 33.33%
Total 58 100.00% 3 100.00%

#endif

static SIMPLE_DEV_PM_OPS(bd2802_pm, bd2802_suspend, bd2802_resume);


static const struct i2c_device_id bd2802_id[] = {
	{ "BD2802", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, bd2802_id);


static struct i2c_driver bd2802_i2c_driver = {
	.driver	= {
		.name	= "BD2802",
		.pm	= &bd2802_pm,
        },
	.probe		= bd2802_probe,
	.remove		= bd2802_remove,
	.id_table	= bd2802_id,
};


module_i2c_driver(bd2802_i2c_driver);

MODULE_AUTHOR("Kim Kyuwon <q1.kim@samsung.com>");
MODULE_DESCRIPTION("BD2802 LED driver");
MODULE_LICENSE("GPL v2");
Overall Contributors
Person Tokens Prop Commits CommitProp
kim kyuwon kim kyuwon 3142 93.10% 4 26.67%
mark brown mark brown 159 4.71% 1 6.67%
axel lin axel lin 43 1.27% 3 20.00%
jingoo han jingoo han 11 0.33% 3 20.00%
bryan wu bryan wu 9 0.27% 1 6.67%
andrew lunn andrew lunn 7 0.21% 1 6.67%
tejun heo tejun heo 3 0.09% 1 6.67%
guenter roeck guenter roeck 1 0.03% 1 6.67%
Total 3375 100.00% 15 100.00%
  Directory: drivers/leds

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
kim kyuwon	kim kyuwon	87	100.00%	1	100.00%
	Total	87	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/leds/leds-bd2802.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
