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leds : add support att1272 white led driver for camera flash led

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This commit is contained in:
ddl
2011-03-11 23:52:26 +08:00
parent 60488c1a79
commit 63415cbc22
5 changed files with 398 additions and 4 deletions
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25
arch/arm/mach-rk29/board-rk29-fih.c
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@@ -43,6 +43,7 @@
#include <mach/rk29_nand.h>
#include <mach/rk29_camera.h> /* ddl@rock-chips.com : camera support */
#include <media/soc_camera.h> /* ddl@rock-chips.com : camera support */
#include <linux/leds-att1272.h> /* ddl@rock-chips.com: camera flash led support */
#include <mach/vpu_mem.h>
#include <mach/sram.h>
@@ -67,7 +68,7 @@
#define PMEM_VPU_SIZE SZ_64M
#define PMEM_CAM_SIZE 0x01300000
#ifdef CONFIG_VIDEO_RK29_WORK_IPP
#define MEM_CAMIPP_SIZE SZ_4M
#define MEM_CAMIPP_SIZE SZ_8M
#else
#define MEM_CAMIPP_SIZE 0
#endif
@@ -805,7 +806,14 @@ struct tps65910_platform_data rk29_tps65910_data = {
};
#endif /* CONFIG_TPS65910_CORE */
/* ddl@rock-chips.com: camera flash led support */
#if CONFIG_LEDS_ATT1272
struct att1272_led_platform_data rk29_att1272_led_data = {
.name = "camera_flash_led",
.en_gpio = RK29_PIN1_PB0,
.flen_gpio = RK29_PIN1_PB1,
};
#endif
/*****************************************************************************************
* i2c devices
* author: kfx@rock-chips.com
@@ -983,6 +991,15 @@ static struct i2c_board_info __initdata board_i2c1_devices[] = {
//.platform_data = &p1003_info,
},
#endif
#if defined (CONFIG_LEDS_ATT1272)
{
.type = "att1272",
.addr = 0x37,
.flags = 0,
.platform_data = &rk29_att1272_led_data,
},
#endif
};
#endif
@@ -1029,7 +1046,7 @@ static struct i2c_board_info __initdata board_i2c3_devices[] = {
*****************************************************************************************/
#ifdef CONFIG_VIDEO_RK29
#define SENSOR_NAME_0 RK29_CAM_SENSOR_NAME_MT9P111 /* back camera sensor */
#define SENSOR_IIC_ADDR_0 0x00
#define SENSOR_IIC_ADDR_0 0x78
#define SENSOR_IIC_ADAPTER_ID_0 1
#define SENSOR_POWER_PIN_0 RK29_PIN5_PD7
#define SENSOR_RESET_PIN_0 INVALID_GPIO
@@ -1041,7 +1058,7 @@ static struct i2c_board_info __initdata board_i2c3_devices[] = {
#define SENSOR_FLASHACTIVE_LEVEL_0 RK29_CAM_FLASHACTIVE_L
#define SENSOR_NAME_1 RK29_CAM_SENSOR_NAME_S5K6AA /* front camera sensor */
#define SENSOR_IIC_ADDR_1 0x78
#define SENSOR_IIC_ADDR_1 0x00
#define SENSOR_IIC_ADAPTER_ID_1 1
#define SENSOR_POWER_PIN_1 INVALID_GPIO
#define SENSOR_RESET_PIN_1 RK29_PIN1_PB3

7
drivers/leds/Kconfig Normal file → Executable file
View File

@@ -236,6 +236,13 @@ config LEDS_BD2802
This option enables support for BD2802GU RGB LED driver chips
accessed via the I2C bus.
config LEDS_ATT1272
tristate "LED driver for ATT1272 LED"
depends on LEDS_CLASS && I2C
help
This option enables support for ATT1272 LED driver chips
accessed via the I2C bus.
comment "LED Triggers"
config LEDS_TRIGGERS

1
drivers/leds/Makefile Normal file → Executable file
View File

@@ -29,6 +29,7 @@ obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
obj-$(CONFIG_LEDS_ATT1272) += leds-att1272.o
# LED SPI Drivers
obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o

346
drivers/leds/leds-att1272.c Executable file
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@@ -0,0 +1,346 @@
/*
* leds-att1272.c - LED Driver
*
* Copyright (C) 2011 Rockchips
* deng dalong <ddl@rock-chips.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/att1272gu-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-att1272.h>
static int debug;
module_param(debug, int, S_IRUGO|S_IWUSR);
#define dprintk(level, fmt, arg...) do { \
if (debug >= level) \
printk(KERN_WARNING"leds-att1272: " fmt , ## arg); } while (0)
#define LEDS_ATT1272_TR(format, ...) printk(KERN_ERR format, ## __VA_ARGS__)
#define LEDS_ATT1272_DG(format, ...) dprintk(0, format, ## __VA_ARGS__)
struct att1272_led {
struct att1272_led_platform_data *pdata;
struct i2c_client *client;
struct rw_semaphore rwsem;
struct work_struct work;
/*
* 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_led;
/* General attributes of LEDs */
int flash_safety_timeout;
int flash_safety_timeout_offset;
int movie_mode_current;
int movie_mode_current_offset;
int flash_to_movie_mode_ratio;
int flash_to_movie_mode_ratio_offset;
int flout_config;
int flout_config_offset;
};
static int att1272_write_byte(struct i2c_client *client, u8 reg, u8 val)
{
int err,cnt;
struct att1272_led *led = i2c_get_clientdata(client);
u8 buf[2];
struct i2c_msg msg[1];
gpio_set_value(led->pdata->en_gpio, 0);
buf[0] = reg & 0xFF;
buf[1] = val;
msg->addr = client->addr;
msg->flags = client->flags;
msg->buf = buf;
msg->len = sizeof(buf);
msg->scl_rate = 100000; /* ddl@rock-chips.com : 100kHz */
msg->read_type = 0; /* fpga i2c:0==I2C_NORMAL : direct use number not enum for don't want include spi_fpga.h */
cnt = 1;
err = -EAGAIN;
gpio_set_value(led->pdata->en_gpio, 1);
while ((cnt-- > 0) && (err < 0)) { /* ddl@rock-chips.com : Transfer again if transent is failed */
err = i2c_transfer(client->adapter, msg, 1);
if (err >= 0) {
err = 0;
goto att1272_write_byte_end;
} else {
LEDS_ATT1272_TR("\n write reg(0x%x, val:0x%x) failed, try to write again!\n",reg, val);
udelay(10);
}
}
att1272_write_byte_end:
gpio_set_value(led->pdata->en_gpio, 0);
return err;
}
#define att1272_CONTROL_ATTR(attr_name, name_str,reg_addr, attr_together) \
static ssize_t att1272_show_##attr_name(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct att1272_led *led = i2c_get_clientdata(to_i2c_client(dev));\
ssize_t ret; \
LEDS_ATT1272_DG("%s enter\n",__FUNCTION__); \
down_read(&led->rwsem); \
ret = sprintf(buf, "0x%02x\n", led->attr_name); \
up_read(&led->rwsem); \
return ret; \
} \
static ssize_t att1272_store_##attr_name(struct device *dev, \
struct device_attribute *attr, const char *buf, size_t count) \
{ \
struct att1272_led *led = i2c_get_clientdata(to_i2c_client(dev));\
unsigned long val,val_w; \
int ret; \
if (!count) \
return -EINVAL; \
ret = strict_strtoul(buf, 16, &val); \
if (ret) \
return ret; \
down_write(&led->rwsem); \
val_w = (val<<led->attr_name##_offset); \
val_w |= (led->attr_together<<led->attr_together##_offset);\
LEDS_ATT1272_DG("%s enter, val:0x%x\n",__FUNCTION__,val_w); \
if (att1272_write_byte(led->client, reg_addr, (u8) val) == 0) { \
led->attr_name = val; \
} \
up_write(&led->rwsem); \
return count; \
} \
static struct device_attribute att1272_##attr_name##_attr = { \
.attr = { \
.name = name_str, \
.mode = 0644, \
.owner = THIS_MODULE \
}, \
.show = att1272_show_##attr_name, \
.store = att1272_store_##attr_name, \
};
att1272_CONTROL_ATTR(flash_safety_timeout, "flash_safety_timeout",0x00,movie_mode_current);
att1272_CONTROL_ATTR(flash_to_movie_mode_ratio, "flash_to_movie_mode_ratio",0x01,flout_config);
att1272_CONTROL_ATTR(flout_config, "flout_config",0x01,flash_to_movie_mode_ratio);
static struct device_attribute *att1272_attributes[] = {
&att1272_flash_safety_timeout_attr,
&att1272_flash_to_movie_mode_ratio_attr,
&att1272_flout_config_attr,
};
static void att1272_led_work(struct work_struct *work)
{
struct att1272_led *led = container_of(work, struct att1272_led, work);
att1272_write_byte(led->client, 0x00, (u8)(led->movie_mode_current<<led->movie_mode_current_offset));
LEDS_ATT1272_DG();
}
static void att1272_set_led_brightness(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct att1272_led *led =
container_of(led_cdev, struct att1272_led, cdev_led);
led->movie_mode_current = led->cdev_led.max_brightness - (value>led->cdev_led.max_brightness)?led->cdev_led.max_brightness:value;
schedule_work(&led->work);
}
static int att1272_set_led_blink(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct att1272_led *led =
container_of(led_cdev, struct att1272_led, cdev_led);
if (*delay_on == 0 || *delay_off == 0)
return -EINVAL;
schedule_work(&led->work);
return 0;
}
static int att1272_register_led_classdev(struct att1272_led *led)
{
int ret;
struct att1272_led_platform_data *pdata = led->client->dev.platform_data;
INIT_WORK(&led->work, att1272_led_work);
led->cdev_led.name = pdata->name;
led->cdev_led.brightness = LED_OFF;
led->cdev_led.max_brightness = 15;
led->cdev_led.brightness_set = att1272_set_led_brightness;
led->cdev_led.blink_set = att1272_set_led_blink;
ret = led_classdev_register(&led->client->dev, &led->cdev_led);
if (ret < 0) {
LEDS_ATT1272_TR("couldn't register LED %s\n",
led->cdev_led.name);
goto failed_unregister_led;
}
return 0;
failed_unregister_led:
return ret;
}
static void att1272_unregister_led_classdev(struct att1272_led *led)
{
cancel_work_sync(&led->work);
led_classdev_unregister(&led->cdev_led);
}
static int __devinit att1272_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct att1272_led *led;
struct att1272_led_platform_data *pdata;
int ret, i;
LEDS_ATT1272_DG("%s enter: client->addr:0x%x\n",__FUNCTION__,client->addr);
led = kzalloc(sizeof(struct att1272_led), GFP_KERNEL);
if (!led) {
LEDS_ATT1272_TR("failed to allocate driver data\n");
return -ENOMEM;
}
led->client = client;
pdata = led->pdata = client->dev.platform_data;
i2c_set_clientdata(client, led);
/* Configure EN GPIO */
if (gpio_request(pdata->en_gpio, "ATT1272_EN") < 0) {
LEDS_ATT1272_TR("request en_gpio(%d) is failed!\n",pdata->en_gpio);
goto failed_free;
}
gpio_direction_output(pdata->en_gpio, 0);
/* Detect att1272 */
printk("att1272 i2c write.....\n");
ret = att1272_write_byte(client, 0x01, 0x30);
ret |= att1272_write_byte(client, 0x00, 0x00);
if (ret < 0) {
LEDS_ATT1272_TR("failed to detect device\n");
goto failed_free;
}
/* Default attributes */
led->flash_safety_timeout = 0x00;
led->flash_safety_timeout_offset = 0x00;
led->movie_mode_current = 0x00;
led->movie_mode_current_offset = 0x04;
led->flash_to_movie_mode_ratio = 0x03;
led->flash_to_movie_mode_ratio_offset = 0x03;
led->flout_config = 0x00;
led->flout_config_offset = 0x04;
init_rwsem(&led->rwsem);
for (i = 0; i < ARRAY_SIZE(att1272_attributes); i++) {
ret = device_create_file(&led->client->dev,
att1272_attributes[i]);
if (ret) {
LEDS_ATT1272_TR("failed: sysfs file %s\n",
att1272_attributes[i]->attr.name);
goto failed_unregister_dev_file;
}
}
ret = att1272_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, att1272_attributes[i]);
failed_free:
i2c_set_clientdata(client, NULL);
kfree(led);
return ret;
}
static int __exit att1272_remove(struct i2c_client *client)
{
struct att1272_led *led = i2c_get_clientdata(client);
int i;
gpio_set_value(led->pdata->en_gpio, 0);
att1272_unregister_led_classdev(led);
for (i = 0; i < ARRAY_SIZE(att1272_attributes); i++)
device_remove_file(&led->client->dev, att1272_attributes[i]);
i2c_set_clientdata(client, NULL);
kfree(led);
return 0;
}
static int att1272_suspend(struct i2c_client *client, pm_message_t mesg)
{
struct att1272_led *led = i2c_get_clientdata(client);
return 0;
}
static int att1272_resume(struct i2c_client *client)
{
struct att1272_led *led = i2c_get_clientdata(client);
return 0;
}
static const struct i2c_device_id att1272_id[] = {
{ "att1272", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, att1272_id);
static struct i2c_driver att1272_i2c_driver = {
.driver = {
.name = "att1272",
},
.probe = att1272_probe,
.remove = __exit_p(att1272_remove),
.suspend = att1272_suspend,
.resume = att1272_resume,
.id_table = att1272_id,
};
static int __init att1272_init(void)
{
return i2c_add_driver(&att1272_i2c_driver);
}
module_init(att1272_init);
static void __exit att1272_exit(void)
{
i2c_del_driver(&att1272_i2c_driver);
}
module_exit(att1272_exit);
MODULE_AUTHOR("deng dalong <ddl@rock-chips.com>");
MODULE_DESCRIPTION("att1272 LED driver");
MODULE_LICENSE("GPL v2");

23
include/linux/leds-att1272.h Executable file
View File

@@ -0,0 +1,23 @@
/*
* leds-att1272.c - LED Driver
*
* Copyright (C) 2011 Rockchips
* deng dalong <ddl@rock-chips.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/att1272gu-e.pdf
*
*/
#ifndef _LEDS_ATT1272_H_
#define _LEDS_ATT1272_H_
struct att1272_led_platform_data {
const char *name;
int en_gpio;
int flen_gpio;
};
#endif /* _LEDS_ATT1272_H_ */