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|
/*
* leds_an30259a.c - driver for panasonic AN30259A led control chip
*
* Copyright (C) 2012, Samsung Electronics Co. Ltd. All Rights Reserved.
*
* Contact: Haeil Hyun <haeil.hyun@samsung.com>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/leds.h>
#include <linux/leds-an30259a.h>
#include <linux/workqueue.h>
#include <linux/wakelock.h>
/* AN30259A register map */
#define AN30259A_REG_SRESET 0x00
#define AN30259A_REG_LEDON 0x01
#define AN30259A_REG_SEL 0x02
#define AN30259A_REG_LED1CC 0x03
#define AN30259A_REG_LED2CC 0x04
#define AN30259A_REG_LED3CC 0x05
#define AN30259A_REG_LED1SLP 0x06
#define AN30259A_REG_LED2SLP 0x07
#define AN30259A_REG_LED3SLP 0x08
#define AN30259A_REG_LED1CNT1 0x09
#define AN30259A_REG_LED1CNT2 0x0a
#define AN30259A_REG_LED1CNT3 0x0b
#define AN30259A_REG_LED1CNT4 0x0c
#define AN30259A_REG_LED2CNT1 0x0d
#define AN30259A_REG_LED2CNT2 0x0e
#define AN30259A_REG_LED2CNT3 0x0f
#define AN30259A_REG_LED2CNT4 0x10
#define AN30259A_REG_LED3CNT1 0x11
#define AN30259A_REG_LED3CNT2 0x12
#define AN30259A_REG_LED3CNT3 0x13
#define AN30259A_REG_LED3CNT4 0x14
#define AN30259A_REG_MAX 0x15
/* MASK */
#define AN30259A_MASK_IMAX 0xc0
#define AN30259A_MASK_DELAY 0xf0
#define AN30259A_SRESET 0x01
#define LED_SLOPE_MODE 0x10
#define LED_ON 0x01
#define DUTYMAX_MAX_VALUE 0x7f
#define DUTYMIN_MIN_VALUE 0x00
#define SLPTT_MAX_VALUE 7500
#define AN30259A_TIME_UNIT 500
#define LED_R_MASK 0x00ff0000
#define LED_G_MASK 0x0000ff00
#define LED_B_MASK 0x000000ff
#define LED_R_SHIFT 16
#define LED_G_SHIFT 8
#define LED_IMAX_SHIFT 6
#define AN30259A_CTN_RW_FLG 0x80
#define LED_R_CURRENT 0x28
#define LED_G_CURRENT 0x28
#define LED_B_CURRENT 0x28
#define LED_OFF 0x00
#define MAX_NUM_LEDS 3
static struct an30259_led_conf led_conf[] = {
{
.name = "led_r",
.brightness = LED_OFF,
.max_brightness = 0x3C,
.flags = 0,
}, {
.name = "led_g",
.brightness = LED_OFF,
.max_brightness = 0x3C,
.flags = 0,
}, {
.name = "led_b",
.brightness = LED_OFF,
.max_brightness = 0x3C,
.flags = 0,
}
};
enum an30259a_led_enum {
LED_R,
LED_G,
LED_B,
};
enum an30259a_pattern {
PATTERN_OFF,
CHARGING,
CHARGING_ERR,
MISSED_NOTI,
LOW_BATTERY,
FULLY_CHARGED,
POWERING,
};
struct an30259a_led {
u8 channel;
u8 brightness;
struct led_classdev cdev;
struct work_struct brightness_work;
unsigned long delay_on_time_ms;
unsigned long delay_off_time_ms;
};
struct an30259a_data {
struct i2c_client *client;
struct mutex mutex;
struct an30259a_led leds[MAX_NUM_LEDS];
u8 shadow_reg[AN30259A_REG_MAX];
};
struct i2c_client *b_client;
#define SEC_LED_SPECIFIC
#define LED_DEEP_DEBUG
#ifdef SEC_LED_SPECIFIC
extern struct class *sec_class;
struct device *led_dev;
/*path : /sys/class/sec/led/led_pattern*/
/*path : /sys/class/sec/led/led_blink*/
/*path : /sys/class/leds/led_r/brightness*/
/*path : /sys/class/leds/led_g/brightness*/
/*path : /sys/class/leds/led_b/brightness*/
#endif
static void leds_on(enum an30259a_led_enum led, bool on, bool slopemode,
u8 ledcc);
static inline struct an30259a_led *cdev_to_led(struct led_classdev *cdev)
{
return container_of(cdev, struct an30259a_led, cdev);
}
#ifdef LED_DEEP_DEBUG
static void an30259a_debug(struct i2c_client *client)
{
struct an30259a_data *data = i2c_get_clientdata(client);
int ret;
u8 buff[21] = {0,};
ret = i2c_smbus_read_i2c_block_data(client,
AN30259A_REG_SRESET|AN30259A_CTN_RW_FLG,
sizeof(buff), buff);
if (ret != sizeof(buff)) {
dev_err(&data->client->dev,
"%s: failure on i2c_smbus_read_i2c_block_data\n",
__func__);
}
print_hex_dump(KERN_ERR, "an30259a: ",
DUMP_PREFIX_OFFSET, 32, 1, buff,
sizeof(buff), false);
}
#endif
static int leds_i2c_write_all(struct i2c_client *client)
{
struct an30259a_data *data = i2c_get_clientdata(client);
int ret;
/*we need to set all the configs setting first, then LEDON later*/
mutex_lock(&data->mutex);
ret = i2c_smbus_write_i2c_block_data(client,
AN30259A_REG_SEL | AN30259A_CTN_RW_FLG,
AN30259A_REG_MAX - AN30259A_REG_SEL,
&data->shadow_reg[AN30259A_REG_SEL]);
if (ret < 0) {
dev_err(&client->adapter->dev,
"%s: failure on i2c block write\n",
__func__);
goto exit;
}
ret = i2c_smbus_write_byte_data(client, AN30259A_REG_LEDON,
data->shadow_reg[AN30259A_REG_LEDON]);
if (ret < 0) {
dev_err(&client->adapter->dev,
"%s: failure on i2c byte write\n",
__func__);
goto exit;
}
mutex_unlock(&data->mutex);
return 0;
exit:
mutex_unlock(&data->mutex);
return ret;
}
void an30259a_set_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct an30259a_led *led = cdev_to_led(cdev);
led->brightness = (u8)brightness;
schedule_work(&led->brightness_work);
}
static void an30259a_led_brightness_work(struct work_struct *work)
{
struct i2c_client *client = b_client;
struct an30259a_led *led = container_of(work,
struct an30259a_led, brightness_work);
leds_on(led->channel, true, false, led->brightness);
leds_i2c_write_all(client);
}
/*
* leds_set_slope_mode() sets correct values to corresponding shadow registers.
* led: stands for LED_R or LED_G or LED_B.
* delay: represents for starting delay time in multiple of .5 second.
* dutymax: led at slope lighting maximum PWM Duty setting.
* dutymid: led at slope lighting middle PWM Duty setting.
* dutymin: led at slope lighting minimum PWM Duty Setting.
* slptt1: total time of slope operation 1 and 2, in multiple of .5 second.
* slptt2: total time of slope operation 3 and 4, in multiple of .5 second.
* dt1: detention time at each step in slope operation 1, in multiple of 4ms.
* dt2: detention time at each step in slope operation 2, in multiple of 4ms.
* dt3: detention time at each step in slope operation 3, in multiple of 4ms.
* dt4: detention time at each step in slope operation 4, in multiple of 4ms.
*/
static void leds_set_slope_mode(struct i2c_client *client,
enum an30259a_led_enum led, u8 delay,
u8 dutymax, u8 dutymid, u8 dutymin,
u8 slptt1, u8 slptt2,
u8 dt1, u8 dt2, u8 dt3, u8 dt4)
{
struct an30259a_data *data = i2c_get_clientdata(client);
data->shadow_reg[AN30259A_REG_LED1CNT1 + led * 4] =
dutymax << 4 | dutymid;
data->shadow_reg[AN30259A_REG_LED1CNT2 + led * 4] =
delay << 4 | dutymin;
data->shadow_reg[AN30259A_REG_LED1CNT3 + led * 4] = dt2 << 4 | dt1;
data->shadow_reg[AN30259A_REG_LED1CNT4 + led * 4] = dt4 << 4 | dt3;
data->shadow_reg[AN30259A_REG_LED1SLP + led] = slptt2 << 4 | slptt1;
}
static void leds_on(enum an30259a_led_enum led, bool on, bool slopemode,
u8 ledcc)
{
struct an30259a_data *data = i2c_get_clientdata(b_client);
if (on)
data->shadow_reg[AN30259A_REG_LEDON] |= LED_ON << led;
else {
data->shadow_reg[AN30259A_REG_LEDON] &= ~(LED_ON << led);
data->shadow_reg[AN30259A_REG_LED1CNT2 + led * 4] &=
~AN30259A_MASK_DELAY;
}
if (slopemode)
data->shadow_reg[AN30259A_REG_LEDON] |= LED_SLOPE_MODE << led;
else
data->shadow_reg[AN30259A_REG_LEDON] &=
~(LED_SLOPE_MODE << led);
data->shadow_reg[AN30259A_REG_LED1CC + led] = ledcc;
}
static int leds_set_imax(struct i2c_client *client, u8 imax)
{
int ret;
struct an30259a_data *data = i2c_get_clientdata(client);
data->shadow_reg[AN30259A_REG_SEL] &= ~AN30259A_MASK_IMAX;
data->shadow_reg[AN30259A_REG_SEL] |= imax << LED_IMAX_SHIFT;
ret = i2c_smbus_write_byte_data(client, AN30259A_REG_SEL,
data->shadow_reg[AN30259A_REG_SEL]);
if (ret < 0) {
dev_err(&client->adapter->dev,
"%s: failure on i2c write\n",
__func__);
}
return 0;
}
#ifdef SEC_LED_SPECIFIC
static void an30259a_reset_register_work(struct work_struct *work)
{
int retval;
struct i2c_client *client;
client = b_client;
leds_on(LED_R, false, false, 0);
leds_on(LED_G, false, false, 0);
leds_on(LED_B, false, false, 0);
retval = leds_i2c_write_all(client);
if (retval)
printk(KERN_WARNING "leds_i2c_write_all failed\n");
}
static void an30259a_start_led_pattern(int mode)
{
int retval;
struct i2c_client *client;
struct work_struct *reset = 0;
client = b_client;
if (mode > POWERING)
return;
/* Set all LEDs Off */
an30259a_reset_register_work(reset);
if (mode == LED_OFF)
return;
switch (mode) {
/* leds_set_slope_mode(client, LED_SEL, DELAY, MAX, MID, MIN,
SLPTT1, SLPTT2, DT1, DT2, DT3, DT4) */
case CHARGING:
leds_on(LED_R, true, false, LED_R_CURRENT);
leds_on(LED_G, false, false, LED_OFF);
leds_on(LED_B, false, false, LED_OFF);
break;
case CHARGING_ERR:
leds_on(LED_R, true, true, LED_R_CURRENT);
leds_on(LED_G, false, false, LED_OFF);
leds_on(LED_B, false, false, LED_OFF);
leds_set_slope_mode(client, LED_R,
1, 15, 15, 0, 1, 1, 0, 0, 0, 0);
break;
case MISSED_NOTI:
leds_on(LED_R, false, false, LED_OFF);
leds_on(LED_G, false, false, LED_OFF);
leds_on(LED_B, true, true, LED_B_CURRENT);
leds_set_slope_mode(client, LED_B,
10, 15, 15, 0, 1, 10, 0, 0, 0, 0);
break;
case LOW_BATTERY:
leds_on(LED_R, true, true, LED_R_CURRENT);
leds_on(LED_G, false, false, LED_OFF);
leds_on(LED_B, false, false, LED_OFF);
leds_set_slope_mode(client, LED_R,
10, 15, 15, 0, 1, 10, 0, 0, 0, 0);
break;
case FULLY_CHARGED:
leds_on(LED_R, false, false, LED_OFF);
leds_on(LED_G, true, false, LED_G_CURRENT);
leds_on(LED_B, false, false, LED_OFF);
break;
case POWERING:
leds_on(LED_R, false, false, 0);
leds_on(LED_G, true, true, LED_G_CURRENT);
leds_on(LED_B, true, true, LED_B_CURRENT);
leds_set_slope_mode(client, LED_G,
0, 8, 4, 1, 2, 2, 3, 3, 3, 3);
leds_set_slope_mode(client, LED_B,
0, 15, 14, 12, 2, 2, 7, 7, 7, 7);
break;
default:
return;
break;
}
retval = leds_i2c_write_all(client);
if (retval)
printk(KERN_WARNING "leds_i2c_write_all failed\n");
}
static void an30259a_set_led_blink(enum an30259a_led_enum led,
unsigned int delay_on_time,
unsigned int delay_off_time,
u8 brightness)
{
struct i2c_client *client;
client = b_client;
if (delay_on_time > SLPTT_MAX_VALUE)
delay_on_time = SLPTT_MAX_VALUE;
if (delay_off_time > SLPTT_MAX_VALUE)
delay_off_time = SLPTT_MAX_VALUE;
if (delay_off_time == LED_OFF) {
leds_on(led, true, false, brightness);
if (brightness == LED_OFF)
leds_on(led, false, false, brightness);
return;
} else if (brightness == LED_OFF) {
leds_on(led, false, false, brightness);
return;
} else
leds_on(led, true, true, brightness);
leds_set_slope_mode(client, led, 0, 15, 7, 0,
(delay_on_time + AN30259A_TIME_UNIT - 1) /
AN30259A_TIME_UNIT,
(delay_off_time + AN30259A_TIME_UNIT - 1) /
AN30259A_TIME_UNIT,
1, 1, 1, 1);
}
static ssize_t store_an30259a_led_br_lev(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
int retval;
unsigned long brightness_lev;
struct i2c_client *client;
struct an30259a_data *data = dev_get_drvdata(dev);
client = b_client;
retval = strict_strtoul(buf, 16, &brightness_lev);
if (retval != 0) {
dev_err(&data->client->dev, "fail to get led_pattern mode.\n");
return count;
}
leds_set_imax(client, brightness_lev);
return count;
}
static ssize_t store_an30259a_led_pattern(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
int retval;
unsigned long mode;
struct an30259a_data *data = dev_get_drvdata(dev);
retval = strict_strtoul(buf, 16, &mode);
if (retval != 0) {
dev_err(&data->client->dev, "fail to get led_pattern mode.\n");
return count;
}
an30259a_start_led_pattern(mode);
printk(KERN_DEBUG "led pattern : %lu is activated\n", mode);
return count;
}
static ssize_t store_an30259a_led_blink(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
int retval;
unsigned int led_brightness = 0;
unsigned int delay_on_time = 0;
unsigned int delay_off_time = 0;
struct an30259a_data *data = dev_get_drvdata(dev);
u8 led_r_brightness = 0;
u8 led_g_brightness = 0;
u8 led_b_brightness = 0;
retval = sscanf(buf, "0x%x %d %d", &led_brightness,
&delay_on_time, &delay_off_time);
if (retval == 0) {
dev_err(&data->client->dev, "fail to get led_blink value.\n");
return count;
}
/*Reset an30259a*/
an30259a_start_led_pattern(LED_OFF);
/*Set LED blink mode*/
led_r_brightness = ((u32)led_brightness & LED_R_MASK)
>> LED_R_SHIFT;
led_g_brightness = ((u32)led_brightness & LED_G_MASK)
>> LED_G_SHIFT;
led_b_brightness = ((u32)led_brightness & LED_B_MASK);
an30259a_set_led_blink(LED_R, delay_on_time,
delay_off_time, led_r_brightness);
an30259a_set_led_blink(LED_G, delay_on_time,
delay_off_time, led_g_brightness);
an30259a_set_led_blink(LED_B, delay_on_time,
delay_off_time, led_b_brightness);
leds_i2c_write_all(data->client);
printk(KERN_DEBUG "led_blink is called\n");
return count;
}
static ssize_t store_led_r(struct device *dev,
struct device_attribute *devattr, const char *buf, size_t count)
{
struct an30259a_data *data = dev_get_drvdata(dev);
char buff[10] = {0,};
int cnt, ret;
u8 brightness;
cnt = count;
cnt = (buf[cnt-1] == '\n') ? cnt-1 : cnt;
memcpy(buff, buf, cnt);
buff[cnt] = '\0';
ret = kstrtou8(buff, 0, &brightness);
if (ret != 0) {
dev_err(&data->client->dev, "fail to get brightness.\n");
goto out;
}
if (brightness == 0)
leds_on(LED_R, false, false, 0);
else
leds_on(LED_R, true, false, brightness);
leds_i2c_write_all(data->client);
an30259a_debug(data->client);
out:
return count;
}
static ssize_t store_led_g(struct device *dev,
struct device_attribute *devattr, const char *buf, size_t count)
{
struct an30259a_data *data = dev_get_drvdata(dev);
char buff[10] = {0,};
int cnt, ret;
u8 brightness;
cnt = count;
cnt = (buf[cnt-1] == '\n') ? cnt-1 : cnt;
memcpy(buff, buf, cnt);
buff[cnt] = '\0';
ret = kstrtou8(buff, 0, &brightness);
if (ret != 0) {
dev_err(&data->client->dev, "fail to get brightness.\n");
goto out;
}
if (brightness == 0)
leds_on(LED_G, false, false, 0);
else
leds_on(LED_G, true, false, brightness);
leds_i2c_write_all(data->client);
an30259a_debug(data->client);
out:
return count;
}
static ssize_t store_led_b(struct device *dev,
struct device_attribute *devattr, const char *buf, size_t count)
{
struct an30259a_data *data = dev_get_drvdata(dev);
char buff[10] = {0,};
int cnt, ret;
u8 brightness;
cnt = count;
cnt = (buf[cnt-1] == '\n') ? cnt-1 : cnt;
memcpy(buff, buf, cnt);
buff[cnt] = '\0';
ret = kstrtou8(buff, 0, &brightness);
if (ret != 0) {
dev_err(&data->client->dev, "fail to get brightness.\n");
goto out;
}
if (brightness == 0)
leds_on(LED_B, false, false, 0);
else
leds_on(LED_B, true, false, brightness);
leds_i2c_write_all(data->client);
an30259a_debug(data->client);
out:
return count;
}
#endif
/* Added for led common class */
static ssize_t led_delay_on_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct an30259a_led *led = cdev_to_led(led_cdev);
return sprintf(buf, "%lu\n", led->delay_on_time_ms);
}
static ssize_t led_delay_on_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct an30259a_led *led = cdev_to_led(led_cdev);
unsigned long time;
if (strict_strtoul(buf, 0, &time))
return -EINVAL;
led->delay_on_time_ms = (int)time;
return len;
}
static ssize_t led_delay_off_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct an30259a_led *led = cdev_to_led(led_cdev);
return sprintf(buf, "%lu\n", led->delay_off_time_ms);
}
static ssize_t led_delay_off_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct an30259a_led *led = cdev_to_led(led_cdev);
unsigned long time;
if (strict_strtoul(buf, 0, &time))
return -EINVAL;
led->delay_off_time_ms = (int)time;
return len;
}
static ssize_t led_blink_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct an30259a_led *led = cdev_to_led(led_cdev);
unsigned long blink_set;
if (strict_strtoul(buf, 0, &blink_set))
return -EINVAL;
if (!blink_set) {
led->delay_on_time_ms = LED_OFF;
an30259a_set_brightness(led_cdev, LED_OFF);
}
led_blink_set(led_cdev,
&led->delay_on_time_ms, &led->delay_off_time_ms);
return len;
}
/* permission for sysfs node */
static DEVICE_ATTR(delay_on, 0644, led_delay_on_show, led_delay_on_store);
static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store);
static DEVICE_ATTR(blink, 0644, NULL, led_blink_store);
#ifdef SEC_LED_SPECIFIC
/* below nodes is SAMSUNG specific nodes */
static DEVICE_ATTR(led_r, 0664, NULL, store_led_r);
static DEVICE_ATTR(led_g, 0664, NULL, store_led_g);
static DEVICE_ATTR(led_b, 0664, NULL, store_led_b);
/* led_pattern node permission is 664 */
/* To access sysfs node from other groups */
static DEVICE_ATTR(led_pattern, 0664, NULL, \
store_an30259a_led_pattern);
static DEVICE_ATTR(led_blink, 0664, NULL, \
store_an30259a_led_blink);
static DEVICE_ATTR(led_br_lev, 0664, NULL, \
store_an30259a_led_br_lev);
#endif
static struct attribute *led_class_attrs[] = {
&dev_attr_delay_on.attr,
&dev_attr_delay_off.attr,
&dev_attr_blink.attr,
NULL,
};
static struct attribute_group common_led_attr_group = {
.attrs = led_class_attrs,
};
#ifdef SEC_LED_SPECIFIC
static struct attribute *sec_led_attributes[] = {
&dev_attr_led_r.attr,
&dev_attr_led_g.attr,
&dev_attr_led_b.attr,
&dev_attr_led_pattern.attr,
&dev_attr_led_blink.attr,
&dev_attr_led_br_lev.attr,
NULL,
};
static struct attribute_group sec_led_attr_group = {
.attrs = sec_led_attributes,
};
#endif
static int __devinit an30259a_initialize(struct i2c_client *client,
struct an30259a_led *led, int channel)
{
struct an30259a_data *data = i2c_get_clientdata(client);
struct device *dev = &client->dev;
int ret;
/* reset an30259a*/
ret = i2c_smbus_write_byte_data(client, AN30259A_REG_SRESET,
AN30259A_SRESET);
if (ret < 0) {
dev_err(&client->adapter->dev,
"%s: failure on i2c write (reg = 0x%2x)\n",
__func__, AN30259A_REG_SRESET);
return ret;
}
ret = i2c_smbus_read_i2c_block_data(client,
AN30259A_REG_SRESET | AN30259A_CTN_RW_FLG,
AN30259A_REG_MAX, data->shadow_reg);
if (ret < 0) {
dev_err(&client->adapter->dev,
"%s: failure on i2c read block(ledxcc)\n",
__func__);
return ret;
}
led->channel = channel;
led->cdev.brightness_set = an30259a_set_brightness;
led->cdev.name = led_conf[channel].name;
led->cdev.brightness = led_conf[channel].brightness;
led->cdev.max_brightness = led_conf[channel].max_brightness;
led->cdev.flags = led_conf[channel].flags;
ret = led_classdev_register(dev, &led->cdev);
if (ret < 0) {
dev_err(dev, "can not register led channel : %d\n", channel);
return ret;
}
ret = sysfs_create_group(&led->cdev.dev->kobj,
&common_led_attr_group);
if (ret < 0) {
dev_err(dev, "can not register sysfs attribute\n");
return ret;
}
leds_set_imax(client, 0x00);
return 0;
}
static int __devinit an30259a_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct an30259a_data *data;
int ret, i;
dev_dbg(&client->adapter->dev, "%s\n", __func__);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "need I2C_FUNC_I2C.\n");
return -ENODEV;
}
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data) {
dev_err(&client->adapter->dev,
"failed to allocate driver data.\n");
return -ENOMEM;
}
i2c_set_clientdata(client, data);
data->client = client;
b_client = client;
mutex_init(&data->mutex);
/* initialize LED */
for (i = 0; i < MAX_NUM_LEDS; i++) {
ret = an30259a_initialize(client, &data->leds[i], i);
if (ret < 0) {
dev_err(&client->adapter->dev, "failure on initialization\n");
goto exit;
}
INIT_WORK(&(data->leds[i].brightness_work),
an30259a_led_brightness_work);
}
#ifdef SEC_LED_SPECIFIC
led_dev = device_create(sec_class, NULL, 0, data, "led");
if (IS_ERR(led_dev)) {
dev_err(&client->dev,
"Failed to create device for samsung specific led\n");
ret = -ENODEV;
}
ret = sysfs_create_group(&led_dev->kobj, &sec_led_attr_group);
if (ret)
dev_err(&client->dev,
"Failed to create sysfs group for samsung specific led\n");
#endif
return ret;
exit:
mutex_destroy(&data->mutex);
kfree(data);
return ret;
}
static int __devexit an30259a_remove(struct i2c_client *client)
{
struct an30259a_data *data = i2c_get_clientdata(client);
int i;
dev_dbg(&client->adapter->dev, "%s\n", __func__);
// clear leds on shutdown
an30259a_set_led_blink(LED_R, 0, 0, 0);
an30259a_set_led_blink(LED_G, 0, 0, 0);
an30259a_set_led_blink(LED_B, 0, 0, 0);
leds_i2c_write_all(data->client);
msleep(200);
#ifdef SEC_LED_SPECIFIC
sysfs_remove_group(&led_dev->kobj, &sec_led_attr_group);
#endif
for (i = 0; i < MAX_NUM_LEDS; i++) {
sysfs_remove_group(&data->leds[i].cdev.dev->kobj,
&common_led_attr_group);
led_classdev_unregister(&data->leds[i].cdev);
cancel_work_sync(&data->leds[i].brightness_work);
}
mutex_destroy(&data->mutex);
kfree(data);
return 0;
}
static struct i2c_device_id an30259a_id[] = {
{"an30259a", 0},
{},
};
MODULE_DEVICE_TABLE(i2c, an30259a_id);
static struct i2c_driver an30259a_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "an30259a",
},
.id_table = an30259a_id,
.probe = an30259a_probe,
.remove = __devexit_p(an30259a_remove),
};
static int __init an30259a_init(void)
{
return i2c_add_driver(&an30259a_i2c_driver);
}
static void __exit an30259a_exit(void)
{
i2c_del_driver(&an30259a_i2c_driver);
}
module_init(an30259a_init);
module_exit(an30259a_exit);
MODULE_DESCRIPTION("AN30259A LED driver");
MODULE_AUTHOR("Haeil Hyun <haeil.hyun@samsung.com");
MODULE_LICENSE("GPL v2");
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