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linux/drivers/leds/leds-bd2802.c
Wolfram Sang fbae3fb154 i2c: Remove all i2c_set_clientdata(client, NULL) in drivers 
I2C drivers can use the clientdata-pointer to point to private data. As I2C
devices are not really unregistered, but merely detached from their driver, it
used to be the drivers obligation to clear this pointer during remove() or a
failed probe(). As a couple of drivers forgot to do this, it was agreed that it
was cleaner if the i2c-core does this clearance when appropriate, as there is
no guarantee for the lifetime of the clientdata-pointer after remove() anyhow.
This feature was added to the core with commit
e4a7b9b04d to fix the faulty drivers.

As there is no need anymore to clear the clientdata-pointer, remove all current
occurrences in the drivers to simplify the code and prevent confusion.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Richard Purdie <rpurdie@linux.intel.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-06-03 11:33:58 +02:00

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/*
* 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>
#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 work_struct work;
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) {
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);
}
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)
{
gpio_set_value(led->pdata->reset_gpio, 1);
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);
}
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);
}
}
#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 = strict_strtoul(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, .owner = THIS_MODULE}, \
.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))
gpio_set_value(led->pdata->reset_gpio, 0);
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,
.owner = THIS_MODULE
},
.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 = strict_strtoul(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, \
.owner = THIS_MODULE \
}, \
.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,
};
static void bd2802_led_work(struct work_struct *work)
{
struct bd2802_led *led = container_of(work, struct bd2802_led, work);
if (led->state)
bd2802_turn_on(led, led->led_id, led->color, led->state);
else
bd2802_turn_off(led, led->led_id, led->color);
}
#define BD2802_CONTROL_RGBS(name, id, clr) \
static void 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; \
else \
led->state = BD2802_ON; \
schedule_work(&led->work); \
} \
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; \
schedule_work(&led->work); \
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;
INIT_WORK(&led->work, bd2802_led_work);
led->cdev_led1r.name = "led1_R";
led->cdev_led1r.brightness = LED_OFF;
led->cdev_led1r.brightness_set = 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 = 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 = 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 = 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 = 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 = 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)
{
cancel_work_sync(&led->work);
led_classdev_unregister(&led->cdev_led1r);
}
static int __devinit 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 = kzalloc(sizeof(struct bd2802_led), GFP_KERNEL);
if (!led) {
dev_err(&client->dev, "failed to allocate driver data\n");
return -ENOMEM;
}
led->client = client;
pdata = led->pdata = client->dev.platform_data;
i2c_set_clientdata(client, led);
/* Configure RESET GPIO (L: RESET, H: RESET cancel) */
gpio_request(pdata->reset_gpio, "RGB_RESETB");
gpio_direction_output(pdata->reset_gpio, 1);
/* 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");
goto failed_free;
} 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]);
failed_free:
kfree(led);
return ret;
}
static int __exit 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]);
kfree(led);
return 0;
}
static int bd2802_suspend(struct i2c_client *client, pm_message_t mesg)
{
struct bd2802_led *led = i2c_get_clientdata(client);
gpio_set_value(led->pdata->reset_gpio, 0);
return 0;
}
static int bd2802_resume(struct i2c_client *client)
{
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;
}
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",
},
.probe = bd2802_probe,
.remove = __exit_p(bd2802_remove),
.suspend = bd2802_suspend,
.resume = bd2802_resume,
.id_table = bd2802_id,
};
static int __init bd2802_init(void)
{
return i2c_add_driver(&bd2802_i2c_driver);
}
module_init(bd2802_init);
static void __exit bd2802_exit(void)
{
i2c_del_driver(&bd2802_i2c_driver);
}
module_exit(bd2802_exit);
MODULE_AUTHOR("Kim Kyuwon <q1.kim@samsung.com>");
MODULE_DESCRIPTION("BD2802 LED driver");
MODULE_LICENSE("GPL v2");
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