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drivers/leds: remove unused att1272 driver
Change-Id: Icd29c4853341947c864f638bc8ea4554f582fa8d Signed-off-by: Tao Huang <huangtao@rock-chips.com>
This commit is contained in:
Tao Huang
@@ -1,346 +0,0 @@
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/*
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* leds-att1272.c - LED Driver
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*
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* Copyright (C) 2011 Rockchips
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* deng dalong <ddl@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Datasheet: http://www.rohm.com/products/databook/driver/pdf/att1272gu-e.pdf
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*
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/leds.h>
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#include <linux/leds-att1272.h>
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static int debug;
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module_param(debug, int, S_IRUGO|S_IWUSR);
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#define dprintk(level, fmt, arg...) do { \
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if (debug >= level) \
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printk(KERN_WARNING"leds-att1272: " fmt , ## arg); } while (0)
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#define LEDS_ATT1272_TR(format, ...) printk(KERN_ERR format, ## __VA_ARGS__)
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#define LEDS_ATT1272_DG(format, ...) dprintk(0, format, ## __VA_ARGS__)
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struct att1272_led {
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struct att1272_led_platform_data *pdata;
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struct i2c_client *client;
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struct rw_semaphore rwsem;
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struct work_struct work;
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/*
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* Making led_classdev as array is not recommended, because array
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* members prevent using 'container_of' macro. So repetitive works
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* are needed.
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*/
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struct led_classdev cdev_led;
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/* General attributes of LEDs */
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int flash_safety_timeout;
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int flash_safety_timeout_offset;
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int movie_mode_current;
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int movie_mode_current_offset;
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int flash_to_movie_mode_ratio;
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int flash_to_movie_mode_ratio_offset;
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int flout_config;
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int flout_config_offset;
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};
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static int att1272_write_byte(struct i2c_client *client, u8 reg, u8 val)
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{
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int err,cnt;
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struct att1272_led *led = i2c_get_clientdata(client);
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u8 buf[2];
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struct i2c_msg msg[1];
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gpio_set_value(led->pdata->en_gpio, 0);
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buf[0] = reg & 0xFF;
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buf[1] = val;
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msg->addr = client->addr;
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msg->flags = client->flags;
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msg->buf = buf;
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msg->len = sizeof(buf);
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msg->scl_rate = 100000; /* ddl@rock-chips.com : 100kHz */
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msg->read_type = 0; /* fpga i2c:0==I2C_NORMAL : direct use number not enum for don't want include spi_fpga.h */
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cnt = 1;
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err = -EAGAIN;
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gpio_set_value(led->pdata->en_gpio, 1);
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while ((cnt-- > 0) && (err < 0)) { /* ddl@rock-chips.com : Transfer again if transent is failed */
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err = i2c_transfer(client->adapter, msg, 1);
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if (err >= 0) {
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err = 0;
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goto att1272_write_byte_end;
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} else {
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LEDS_ATT1272_TR("\n write reg(0x%x, val:0x%x) failed, try to write again!\n",reg, val);
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udelay(10);
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}
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}
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att1272_write_byte_end:
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gpio_set_value(led->pdata->en_gpio, 0);
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return err;
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}
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#define att1272_CONTROL_ATTR(attr_name, name_str,reg_addr, attr_together) \
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static ssize_t att1272_show_##attr_name(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct att1272_led *led = i2c_get_clientdata(to_i2c_client(dev));\
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ssize_t ret; \
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LEDS_ATT1272_DG("%s enter\n",__FUNCTION__); \
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down_read(&led->rwsem); \
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ret = sprintf(buf, "0x%02x\n", led->attr_name); \
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up_read(&led->rwsem); \
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return ret; \
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} \
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static ssize_t att1272_store_##attr_name(struct device *dev, \
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struct device_attribute *attr, const char *buf, size_t count) \
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{ \
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struct att1272_led *led = i2c_get_clientdata(to_i2c_client(dev));\
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unsigned long val,val_w; \
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int ret; \
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if (!count) \
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return -EINVAL; \
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ret = strict_strtoul(buf, 16, &val); \
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if (ret) \
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return ret; \
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down_write(&led->rwsem); \
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val_w = (val<<led->attr_name##_offset); \
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val_w |= (led->attr_together<<led->attr_together##_offset);\
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LEDS_ATT1272_DG("%s enter, val:0x%x\n",__FUNCTION__,val_w); \
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if (att1272_write_byte(led->client, reg_addr, (u8) val) == 0) { \
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led->attr_name = val; \
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} \
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up_write(&led->rwsem); \
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return count; \
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} \
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static struct device_attribute att1272_##attr_name##_attr = { \
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.attr = { \
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.name = name_str, \
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.mode = 0644, \
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.owner = THIS_MODULE \
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}, \
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.show = att1272_show_##attr_name, \
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.store = att1272_store_##attr_name, \
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};
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att1272_CONTROL_ATTR(flash_safety_timeout, "flash_safety_timeout",0x00,movie_mode_current);
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att1272_CONTROL_ATTR(flash_to_movie_mode_ratio, "flash_to_movie_mode_ratio",0x01,flout_config);
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att1272_CONTROL_ATTR(flout_config, "flout_config",0x01,flash_to_movie_mode_ratio);
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static struct device_attribute *att1272_attributes[] = {
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&att1272_flash_safety_timeout_attr,
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&att1272_flash_to_movie_mode_ratio_attr,
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&att1272_flout_config_attr,
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};
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static void att1272_led_work(struct work_struct *work)
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{
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struct att1272_led *led = container_of(work, struct att1272_led, work);
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att1272_write_byte(led->client, 0x00, (u8)(led->movie_mode_current<<led->movie_mode_current_offset));
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LEDS_ATT1272_DG();
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}
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static void att1272_set_led_brightness(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct att1272_led *led =
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container_of(led_cdev, struct att1272_led, cdev_led);
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led->movie_mode_current = led->cdev_led.max_brightness - (value>led->cdev_led.max_brightness)?led->cdev_led.max_brightness:value;
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schedule_work(&led->work);
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}
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static int att1272_set_led_blink(struct led_classdev *led_cdev,
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unsigned long *delay_on, unsigned long *delay_off)
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{
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struct att1272_led *led =
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container_of(led_cdev, struct att1272_led, cdev_led);
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if (*delay_on == 0 || *delay_off == 0)
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return -EINVAL;
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schedule_work(&led->work);
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return 0;
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}
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static int att1272_register_led_classdev(struct att1272_led *led)
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{
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int ret;
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struct att1272_led_platform_data *pdata = led->client->dev.platform_data;
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INIT_WORK(&led->work, att1272_led_work);
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led->cdev_led.name = pdata->name;
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led->cdev_led.brightness = LED_OFF;
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led->cdev_led.max_brightness = 15;
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led->cdev_led.brightness_set = att1272_set_led_brightness;
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led->cdev_led.blink_set = att1272_set_led_blink;
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ret = led_classdev_register(&led->client->dev, &led->cdev_led);
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if (ret < 0) {
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LEDS_ATT1272_TR("couldn't register LED %s\n",
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led->cdev_led.name);
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goto failed_unregister_led;
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}
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return 0;
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failed_unregister_led:
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return ret;
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}
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static void att1272_unregister_led_classdev(struct att1272_led *led)
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{
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cancel_work_sync(&led->work);
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led_classdev_unregister(&led->cdev_led);
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}
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static int __devinit att1272_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct att1272_led *led;
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struct att1272_led_platform_data *pdata;
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int ret, i;
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LEDS_ATT1272_DG("%s enter: client->addr:0x%x\n",__FUNCTION__,client->addr);
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led = kzalloc(sizeof(struct att1272_led), GFP_KERNEL);
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if (!led) {
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LEDS_ATT1272_TR("failed to allocate driver data\n");
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return -ENOMEM;
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}
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led->client = client;
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pdata = led->pdata = client->dev.platform_data;
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i2c_set_clientdata(client, led);
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/* Configure EN GPIO */
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if (gpio_request(pdata->en_gpio, "ATT1272_EN") < 0) {
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LEDS_ATT1272_TR("request en_gpio(%d) is failed!\n",pdata->en_gpio);
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goto failed_free;
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}
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gpio_direction_output(pdata->en_gpio, 0);
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/* Detect att1272 */
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printk("att1272 i2c write.....\n");
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ret = att1272_write_byte(client, 0x01, 0x30);
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ret |= att1272_write_byte(client, 0x00, 0x00);
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if (ret < 0) {
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LEDS_ATT1272_TR("failed to detect device\n");
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goto failed_free;
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}
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/* Default attributes */
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led->flash_safety_timeout = 0x00;
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led->flash_safety_timeout_offset = 0x00;
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led->movie_mode_current = 0x00;
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led->movie_mode_current_offset = 0x04;
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led->flash_to_movie_mode_ratio = 0x03;
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led->flash_to_movie_mode_ratio_offset = 0x03;
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led->flout_config = 0x00;
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led->flout_config_offset = 0x04;
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init_rwsem(&led->rwsem);
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for (i = 0; i < ARRAY_SIZE(att1272_attributes); i++) {
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ret = device_create_file(&led->client->dev,
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att1272_attributes[i]);
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if (ret) {
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LEDS_ATT1272_TR("failed: sysfs file %s\n",
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att1272_attributes[i]->attr.name);
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goto failed_unregister_dev_file;
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}
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}
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ret = att1272_register_led_classdev(led);
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if (ret < 0)
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goto failed_unregister_dev_file;
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return 0;
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failed_unregister_dev_file:
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for (i--; i >= 0; i--)
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device_remove_file(&led->client->dev, att1272_attributes[i]);
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failed_free:
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i2c_set_clientdata(client, NULL);
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kfree(led);
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return ret;
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}
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static int __exit att1272_remove(struct i2c_client *client)
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{
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struct att1272_led *led = i2c_get_clientdata(client);
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int i;
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gpio_set_value(led->pdata->en_gpio, 0);
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att1272_unregister_led_classdev(led);
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for (i = 0; i < ARRAY_SIZE(att1272_attributes); i++)
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device_remove_file(&led->client->dev, att1272_attributes[i]);
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i2c_set_clientdata(client, NULL);
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kfree(led);
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return 0;
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}
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static int att1272_suspend(struct i2c_client *client, pm_message_t mesg)
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{
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struct att1272_led *led = i2c_get_clientdata(client);
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return 0;
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}
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static int att1272_resume(struct i2c_client *client)
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{
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struct att1272_led *led = i2c_get_clientdata(client);
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return 0;
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}
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static const struct i2c_device_id att1272_id[] = {
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{ "att1272", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, att1272_id);
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static struct i2c_driver att1272_i2c_driver = {
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.driver = {
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.name = "att1272",
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},
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.probe = att1272_probe,
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.remove = __exit_p(att1272_remove),
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.suspend = att1272_suspend,
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.resume = att1272_resume,
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.id_table = att1272_id,
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};
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static int __init att1272_init(void)
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{
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return i2c_add_driver(&att1272_i2c_driver);
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}
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module_init(att1272_init);
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static void __exit att1272_exit(void)
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{
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i2c_del_driver(&att1272_i2c_driver);
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}
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module_exit(att1272_exit);
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MODULE_AUTHOR("deng dalong <ddl@rock-chips.com>");
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MODULE_DESCRIPTION("att1272 LED driver");
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MODULE_LICENSE("GPL v2");
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@@ -1,23 +0,0 @@
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/*
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* leds-att1272.c - LED Driver
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*
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* Copyright (C) 2011 Rockchips
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* deng dalong <ddl@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Datasheet: http://www.rohm.com/products/databook/driver/pdf/att1272gu-e.pdf
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*
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*/
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#ifndef _LEDS_ATT1272_H_
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#define _LEDS_ATT1272_H_
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struct att1272_led_platform_data {
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const char *name;
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int en_gpio;
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int flen_gpio;
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};
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#endif /* _LEDS_ATT1272_H_ */
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