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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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orangepi/linux-orangepi-5.10.y.git/trunk/drivers/leds/leds-bd2802.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
 * leds-bd2802.c - RGB LED Driver
 *
 * Copyright (C) 2009 Samsung Electronics
 * Kim Kyuwon <q1.kim@samsung.com>
 *
 * Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf
 */
 
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/gpio/consumer.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 gpio_desc		*reset;
<------>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;
<------>}
}
 
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;
}
 
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;
}
 
static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color)
{
<------>return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET;
}
 
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);
}
 
 
/*--------------------------------------------------------------*/
/*	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;
}
 
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) {
<------><------>gpiod_set_value(led->reset, 1);
<------><------>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);
}
 
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);
}
 
static void bd2802_reset_cancel(struct bd2802_led *led)
{
<------>gpiod_set_value(led->reset, 0);
<------>udelay(100);
<------>bd2802_configure(led);
}
 
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);
}
 
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);
}
 
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);
}
 
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);
}
 
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);
}
 
#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]);
}
 
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))
<------><------>gpiod_set_value(led->reset, 1);
 
<------>led->adf_on = 0;
}
 
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;
}
 
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;
}
 
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;
}
 
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);
}
 
static int bd2802_probe(struct i2c_client *client,
<------><------><------>const struct i2c_device_id *id)
{
<------>struct bd2802_led *led;
<------>int ret, i;
 
<------>led = devm_kzalloc(&client->dev, sizeof(struct bd2802_led), GFP_KERNEL);
<------>if (!led)
<------><------>return -ENOMEM;
 
<------>led->client = client;
<------>i2c_set_clientdata(client, led);
 
<------>/*
<------> * Configure RESET GPIO (L: RESET, H: RESET cancel)
<------> *
<------> * We request the reset GPIO as OUT_LOW which means de-asserted,
<------> * board files specifying this GPIO line in a machine descriptor
<------> * table should take care to specify GPIO_ACTIVE_LOW for this line.
<------> */
<------>led->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_LOW);
<------>if (IS_ERR(led->reset))
<------><------>return PTR_ERR(led->reset);
 
<------>/* 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 */
<------>gpiod_set_value(led->reset, 1);
 
<------>/* 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;
}
 
static int bd2802_remove(struct i2c_client *client)
{
<------>struct bd2802_led *led = i2c_get_clientdata(client);
<------>int i;
 
<------>gpiod_set_value(led->reset, 1);
<------>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;
}
 
#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);
<------>}
}
 
static int bd2802_suspend(struct device *dev)
{
<------>struct i2c_client *client = to_i2c_client(dev);
<------>struct bd2802_led *led = i2c_get_clientdata(client);
 
<------>gpiod_set_value(led->reset, 1);
 
<------>return 0;
}
 
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;
}
#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");
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