Merge "leds: add initial driver for AW2016 LED device" (d45271c3) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/leds/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -78,6 +78,13 @@ config LEDS_AS3645A
		controller. V4L2 flash API is provided as well if
		CONFIG_V4L2_FLASH_API is enabled.

		config LEDS_AW2016
		tristate "LED Support for AW2016"
		depends on LEDS_CLASS && I2C
		help
		this option enables support for the AW2016 RGB LED connected
		through I2C. Say Y to enable support for the AW2016 LED

		config LEDS_BCM6328
		tristate "LED Support for Broadcom BCM6328"
		depends on LEDS_CLASS

drivers/leds/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -11,6 +11,7 @@ obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o
		obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o
		obj-$(CONFIG_LEDS_APU) += leds-apu.o
		obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o
		obj-$(CONFIG_LEDS_AW2016) += leds-aw2016.o
		obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o
		obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o
		obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o

drivers/leds/leds-aw2016.c

0 → 100644

+671 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2017, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		* only version 2 as published by the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		*/

		#include <linux/delay.h>
		#include <linux/i2c.h>
		#include <linux/init.h>
		#include <linux/leds.h>
		#include <linux/module.h>
		#include <linux/mutex.h>
		#include <linux/slab.h>
		#include <linux/regulator/consumer.h>
		#include <linux/leds-aw2016.h>

		#define AW2016_DRIVER_VERSION "V1.0.3"

		/* register address */
		#define AW2016_REG_RESET 0x00
		#define AW2016_REG_GCR1 0x01
		#define AW2016_REG_STATUS 0x02
		#define AW2016_REG_PATST 0x03
		#define AW2016_REG_GCR2 0x04
		#define AW2016_REG_LEDEN 0x30
		#define AW2016_REG_LCFG1 0x31
		#define AW2016_REG_LCFG2 0x32
		#define AW2016_REG_LCFG3 0x33
		#define AW2016_REG_PWM1 0x34
		#define AW2016_REG_PWM2 0x35
		#define AW2016_REG_PWM3 0x36
		#define AW2016_REG_LED1T0 0x37
		#define AW2016_REG_LED1T1 0x38
		#define AW2016_REG_LED1T2 0x39
		#define AW2016_REG_LED2T0 0x3A
		#define AW2016_REG_LED2T1 0x3B
		#define AW2016_REG_LED2T2 0x3C
		#define AW2016_REG_LED3T0 0x3D
		#define AW2016_REG_LED3T1 0x3E
		#define AW2016_REG_LED3T2 0x3F

		/* register bits */
		#define AW2016_CHIPID 0x09
		#define AW2016_CHIP_RESET_MASK 0x55
		#define AW2016_CHIP_DISABLE_MASK 0x00
		#define AW2016_CHIP_ENABLE_MASK 0x01
		#define AW2016_CHARGE_DISABLE_MASK 0x02
		#define AW2016_LED_BREATH_MODE_MASK 0x10
		#define AW2016_LED_MANUAL_MODE_MASK 0x00
		#define AW2016_LED_BREATHE_PWM_MASK 0xFF
		#define AW2016_LED_MANUAL_PWM_MASK 0xFF
		#define AW2016_LED_FADEIN_MODE_MASK 0x20
		#define AW2016_LED_FADEOUT_MODE_MASK 0x40
		#define AW2016_CHIP_STANDBY 0x02

		#define MAX_RISE_TIME_MS 15
		#define MAX_HOLD_TIME_MS 15
		#define MAX_FALL_TIME_MS 15
		#define MAX_OFF_TIME_MS 15

		/* aw2016 register read/write access*/
		#define REG_NONE_ACCESS 0
		#define REG_RD_ACCESS (1 << 0)
		#define REG_WR_ACCESS (1 << 1)
		#define AW2016_REG_MAX 0x7F

		const unsigned char aw2016_reg_access[AW2016_REG_MAX] = {
		[AW2016_REG_RESET] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_GCR1] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_STATUS] = REG_RD_ACCESS,
		[AW2016_REG_PATST] = REG_RD_ACCESS,
		[AW2016_REG_GCR2] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LEDEN] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LCFG1] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LCFG2] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LCFG3] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_PWM1] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_PWM2] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_PWM3] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED1T0] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED1T1] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED1T2] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED2T0] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED2T1] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED2T2] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED3T0] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED3T1] = REG_RD_ACCESS \| REG_WR_ACCESS,
		[AW2016_REG_LED3T2] = REG_RD_ACCESS \| REG_WR_ACCESS,
		};

		struct aw2016_led {
		struct i2c_client *client;
		struct led_classdev cdev;
		struct aw2016_platform_data *pdata;
		struct work_struct brightness_work;
		struct work_struct blink_work;
		struct mutex lock;
		int num_leds;
		int id;
		int blinking;
		};

		static int aw2016_write(struct aw2016_led *led, u8 reg, u8 val)
		{
		int ret = -EINVAL, retry_times = 0;

		do {
		ret = i2c_smbus_write_byte_data(led->client, reg, val);
		retry_times++;
		if (retry_times == 5)
		break;
		} while (ret < 0);

		return ret;
		}

		static int aw2016_read(struct aw2016_led led, u8 reg, u8 val)
		{
		int ret = -EINVAL, retry_times = 0;

		do {
		ret = i2c_smbus_read_byte_data(led->client, reg);
		retry_times++;
		if (retry_times == 5)
		break;
		} while (ret < 0);

		if (ret < 0)
		return ret;

		*val = ret;
		return 0;
		}

		static void aw2016_soft_reset(struct aw2016_led *led)
		{
		aw2016_write(led, AW2016_REG_RESET, AW2016_CHIP_RESET_MASK);
		msleep(5);
		}

		static void aw2016_brightness_work(struct work_struct *work)
		{
		struct aw2016_led *led =
		container_of(work, struct aw2016_led, brightness_work);
		u8 val;

		mutex_lock(&led->pdata->led->lock);

		/* enable aw2016 if disabled */
		aw2016_read(led, AW2016_REG_GCR1, &val);
		if (!(val & AW2016_CHIP_ENABLE_MASK)) {
		aw2016_write(led, AW2016_REG_GCR1,
		AW2016_CHARGE_DISABLE_MASK \|
		AW2016_CHIP_ENABLE_MASK);
		msleep(2);
		}

		if (led->cdev.brightness > 0) {
		if (led->cdev.brightness > led->cdev.max_brightness)
		led->cdev.brightness = led->cdev.max_brightness;
		aw2016_write(led, AW2016_REG_GCR2, led->pdata->imax);
		aw2016_write(led, AW2016_REG_LCFG1 + led->id,
		(AW2016_LED_MANUAL_MODE_MASK \|
		led->pdata->led_current));
		aw2016_write(led, AW2016_REG_PWM1 + led->id,
		led->cdev.brightness);
		aw2016_read(led, AW2016_REG_LEDEN, &val);
		aw2016_write(led, AW2016_REG_LEDEN, val \| (1 << led->id));
		} else {
		aw2016_read(led, AW2016_REG_LEDEN, &val);
		aw2016_write(led, AW2016_REG_LEDEN, val & (~(1 << led->id)));
		}

		/*
		* If value in AW2016_REG_LEDEN is 0, it means the RGB leds are
		* all off. So we need to power it off.
		*/
		aw2016_read(led, AW2016_REG_LEDEN, &val);
		if (val == 0) {
		aw2016_write(led, AW2016_REG_GCR1,
		AW2016_CHARGE_DISABLE_MASK \|
		AW2016_CHIP_DISABLE_MASK);
		mutex_unlock(&led->pdata->led->lock);
		return;
		}

		mutex_unlock(&led->pdata->led->lock);
		}

		static void aw2016_blink_work(struct work_struct *work)
		{
		struct aw2016_led *led =
		container_of(work, struct aw2016_led, blink_work);
		u8 val;

		mutex_lock(&led->pdata->led->lock);

		/* enable aw2016 if disabled */
		aw2016_read(led, AW2016_REG_GCR1, &val);
		if (!(val & AW2016_CHIP_ENABLE_MASK)) {
		aw2016_write(led, AW2016_REG_GCR1,
		AW2016_CHARGE_DISABLE_MASK \|
		AW2016_CHIP_ENABLE_MASK);
		msleep(2);
		}

		led->cdev.brightness = led->blinking ? led->cdev.max_brightness : 0;

		if (led->blinking > 0) {
		aw2016_write(led, AW2016_REG_GCR2, led->pdata->imax);
		aw2016_write(led, AW2016_REG_PWM1 + led->id,
		led->cdev.brightness);
		aw2016_write(led, AW2016_REG_LED1T0 + led->id * 3,
		(led->pdata->rise_time_ms << 4 \|
		led->pdata->hold_time_ms));
		aw2016_write(led, AW2016_REG_LED1T1 + led->id * 3,
		(led->pdata->fall_time_ms << 4 \|
		led->pdata->off_time_ms));
		aw2016_write(led, AW2016_REG_LCFG1 + led->id,
		(AW2016_LED_BREATH_MODE_MASK \|
		led->pdata->led_current));
		aw2016_read(led, AW2016_REG_LEDEN, &val);
		aw2016_write(led, AW2016_REG_LEDEN, val \| (1 << led->id));
		} else {
		aw2016_read(led, AW2016_REG_LEDEN, &val);
		aw2016_write(led, AW2016_REG_LEDEN, val & (~(1 << led->id)));
		}

		/*
		* If value in AW2016_REG_LEDEN is 0, it means the RGB leds are
		* all off. So we need to power it off.
		*/
		aw2016_read(led, AW2016_REG_LEDEN, &val);
		if (val == 0) {
		aw2016_write(led, AW2016_REG_GCR1,
		AW2016_CHARGE_DISABLE_MASK \|
		AW2016_CHIP_DISABLE_MASK);
		}

		mutex_unlock(&led->pdata->led->lock);
		}

		static void aw2016_set_brightness(struct led_classdev *cdev,
		enum led_brightness brightness)
		{
		struct aw2016_led *led = container_of(cdev, struct aw2016_led, cdev);

		led->cdev.brightness = brightness;

		schedule_work(&led->brightness_work);
		}

		static ssize_t aw2016_store_blink(struct device *dev,
		struct device_attribute *attr,
		const char *buf, size_t len)
		{
		unsigned long blinking;
		struct led_classdev *led_cdev = dev_get_drvdata(dev);
		struct aw2016_led *led =
		container_of(led_cdev, struct aw2016_led, cdev);
		ssize_t ret = -EINVAL;

		ret = kstrtoul(buf, 10, &blinking);
		if (ret)
		return ret;
		led->blinking = (int)blinking;
		schedule_work(&led->blink_work);

		return len;
		}

		static ssize_t aw2016_led_time_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		struct led_classdev *led_cdev = dev_get_drvdata(dev);
		struct aw2016_led *led =
		container_of(led_cdev, struct aw2016_led, cdev);

		return snprintf(buf, PAGE_SIZE, "%d %d %d %d\n",
		led->pdata->rise_time_ms, led->pdata->hold_time_ms,
		led->pdata->fall_time_ms, led->pdata->off_time_ms);
		}

		static ssize_t aw2016_led_time_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf, size_t len)
		{
		struct led_classdev *led_cdev = dev_get_drvdata(dev);
		struct aw2016_led *led =
		container_of(led_cdev, struct aw2016_led, cdev);
		int rc, rise_time_ms, hold_time_ms, fall_time_ms, off_time_ms;

		rc = sscanf(buf, "%d %d %d %d", &rise_time_ms, &hold_time_ms,
		&fall_time_ms, &off_time_ms);

		mutex_lock(&led->pdata->led->lock);
		led->pdata->rise_time_ms = (rise_time_ms > MAX_RISE_TIME_MS) ?
		MAX_RISE_TIME_MS :
		rise_time_ms;
		led->pdata->hold_time_ms = (hold_time_ms > MAX_HOLD_TIME_MS) ?
		MAX_HOLD_TIME_MS :
		hold_time_ms;
		led->pdata->fall_time_ms = (fall_time_ms > MAX_FALL_TIME_MS) ?
		MAX_FALL_TIME_MS :
		fall_time_ms;
		led->pdata->off_time_ms =
		(off_time_ms > MAX_OFF_TIME_MS) ? MAX_OFF_TIME_MS : off_time_ms;
		led->blinking = 1;
		mutex_unlock(&led->pdata->led->lock);

		schedule_work(&led->blink_work);

		return len;
		}

		static ssize_t aw2016_reg_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		struct led_classdev *led_cdev = dev_get_drvdata(dev);
		struct aw2016_led *led =
		container_of(led_cdev, struct aw2016_led, cdev);

		unsigned char i, reg_val;
		ssize_t len = 0;

		for (i = 0; i < AW2016_REG_MAX; i++) {
		if (!(aw2016_reg_access[i] & REG_RD_ACCESS))
		continue;
		aw2016_read(led, i, &reg_val);
		len += snprintf(buf + len, PAGE_SIZE - len,
		"reg:0x%02x=0x%02x\n", i, reg_val);
		}

		return len;
		}

		static ssize_t aw2016_reg_store(struct device *dev,
		struct device_attribute attr, const char buf,
		size_t len)
		{
		struct led_classdev *led_cdev = dev_get_drvdata(dev);
		struct aw2016_led *led =
		container_of(led_cdev, struct aw2016_led, cdev);

		unsigned int databuf[2];

		if (2 == sscanf(buf, "%x %x", &databuf[0], &databuf[1])) {
		aw2016_write(led, (unsigned char)databuf[0],
		(unsigned char)databuf[1]);
		}

		return len;
		}
		static DEVICE_ATTR(blink, 0664, NULL, aw2016_store_blink);
		static DEVICE_ATTR(led_time, 0664, aw2016_led_time_show, aw2016_led_time_store);
		static DEVICE_ATTR(reg, 0664, aw2016_reg_show, aw2016_reg_store);

		static struct attribute *aw2016_led_attributes[] = {
		&dev_attr_blink.attr,
		&dev_attr_led_time.attr,
		&dev_attr_reg.attr,
		NULL,
		};

		static struct attribute_group aw2016_led_attr_group = {
		.attrs = aw2016_led_attributes
		};
		static int aw2016_check_chipid(struct aw2016_led *led)
		{
		u8 val;
		u8 cnt;

		for (cnt = 5; cnt > 0; cnt--) {
		aw2016_read(led, AW2016_REG_RESET, &val);
		dev_notice(&led->client->dev, "aw2016 chip id %0x", val);
		if (val == AW2016_CHIPID)
		return 0;
		}

		return -EINVAL;
		}

		static int aw2016_led_err_handle(struct aw2016_led *led_array, int parsed_leds)
		{
		int i;
		/*
		* If probe fails, cannot free resource of all LEDs, only free
		* resources of LEDs which have allocated these resource really.
		*/
		for (i = 0; i < parsed_leds; i++) {
		sysfs_remove_group(&led_array[i].cdev.dev->kobj,
		&aw2016_led_attr_group);
		led_classdev_unregister(&led_array[i].cdev);
		cancel_work_sync(&led_array[i].brightness_work);
		cancel_work_sync(&led_array[i].blink_work);
		devm_kfree(&led_array->client->dev, led_array[i].pdata);
		led_array[i].pdata = NULL;
		}
		return i;
		}

		static int aw2016_led_parse_child_node(struct aw2016_led *led_array,
		struct device_node *node)
		{
		struct aw2016_led *led;
		struct device_node *temp;
		struct aw2016_platform_data *pdata;
		int rc = 0, parsed_leds = 0;

		for_each_child_of_node(node, temp) {
		led = &led_array[parsed_leds];
		led->client = led_array->client;

		pdata = devm_kzalloc(&led->client->dev,
		sizeof(struct aw2016_platform_data),
		GFP_KERNEL);
		if (!pdata) {
		dev_err(&led->client->dev,
		"Failed to allocate memory\n");
		goto free_err;
		}
		pdata->led = led_array;
		led->pdata = pdata;

		rc = of_property_read_string(temp, "aw2016,name",
		&led->cdev.name);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading led name, rc = %d\n", rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,id", &led->id);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading id, rc = %d\n", rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,imax",
		&led->pdata->imax);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading imax, rc = %d\n", rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,led-current",
		&led->pdata->led_current);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading led-current, rc = %d\n", rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,max-brightness",
		&led->cdev.max_brightness);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading max-brightness, rc = %d\n",
		rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,rise-time-ms",
		&led->pdata->rise_time_ms);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading rise-time-ms, rc = %d\n", rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,hold-time-ms",
		&led->pdata->hold_time_ms);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading hold-time-ms, rc = %d\n", rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,fall-time-ms",
		&led->pdata->fall_time_ms);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading fall-time-ms, rc = %d\n", rc);
		goto free_pdata;
		}

		rc = of_property_read_u32(temp, "aw2016,off-time-ms",
		&led->pdata->off_time_ms);
		if (rc < 0) {
		dev_err(&led->client->dev,
		"Failure reading off-time-ms, rc = %d\n", rc);
		goto free_pdata;
		}

		INIT_WORK(&led->brightness_work, aw2016_brightness_work);
		INIT_WORK(&led->blink_work, aw2016_blink_work);

		led->cdev.brightness_set = aw2016_set_brightness;

		rc = led_classdev_register(&led->client->dev, &led->cdev);
		if (rc) {
		dev_err(&led->client->dev,
		"unable to register led %d,rc=%d\n", led->id,
		rc);
		goto free_pdata;
		}

		rc = sysfs_create_group(&led->cdev.dev->kobj,
		&aw2016_led_attr_group);
		if (rc) {
		dev_err(&led->client->dev, "led sysfs rc: %d\n", rc);
		goto free_class;
		}
		parsed_leds++;
		}

		return 0;

		free_class:
		aw2016_led_err_handle(led_array, parsed_leds);
		led_classdev_unregister(&led_array[parsed_leds].cdev);
		cancel_work_sync(&led_array[parsed_leds].brightness_work);
		cancel_work_sync(&led_array[parsed_leds].blink_work);
		devm_kfree(&led->client->dev, led_array[parsed_leds].pdata);
		led_array[parsed_leds].pdata = NULL;
		return rc;

		free_pdata:
		aw2016_led_err_handle(led_array, parsed_leds);
		devm_kfree(&led->client->dev, led_array[parsed_leds].pdata);
		return rc;

		free_err:
		aw2016_led_err_handle(led_array, parsed_leds);
		return rc;
		}

		static int aw2016_led_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct aw2016_led *led_array;
		struct device_node *node;
		int ret = -EINVAL, num_leds = 0;

		node = client->dev.of_node;
		if (node == NULL)
		return -EINVAL;

		num_leds = of_get_child_count(node);

		if (!num_leds)
		return -EINVAL;

		led_array = devm_kzalloc(&client->dev,
		(sizeof(struct aw2016_led) * num_leds),
		GFP_KERNEL);
		if (!led_array)
		return -ENOMEM;

		led_array->client = client;
		led_array->num_leds = num_leds;

		mutex_init(&led_array->lock);

		ret = aw2016_led_parse_child_node(led_array, node);
		if (ret) {
		dev_err(&client->dev, "parsed node error\n");
		goto free_led_arry;
		}

		i2c_set_clientdata(client, led_array);

		ret = aw2016_check_chipid(led_array);
		if (ret) {
		dev_err(&client->dev, "Check chip id error\n");
		goto fail_parsed_node;
		}

		/* soft rst */
		aw2016_soft_reset(led_array);

		return 0;

		fail_parsed_node:
		aw2016_led_err_handle(led_array, num_leds);
		free_led_arry:
		mutex_destroy(&led_array->lock);
		devm_kfree(&client->dev, led_array);
		led_array = NULL;
		return ret;
		}

		static int aw2016_led_remove(struct i2c_client *client)
		{
		struct aw2016_led *led_array = i2c_get_clientdata(client);
		int i, parsed_leds = led_array->num_leds;

		for (i = 0; i < parsed_leds; i++) {
		sysfs_remove_group(&led_array[i].cdev.dev->kobj,
		&aw2016_led_attr_group);
		led_classdev_unregister(&led_array[i].cdev);
		cancel_work_sync(&led_array[i].brightness_work);
		cancel_work_sync(&led_array[i].blink_work);
		devm_kfree(&client->dev, led_array[i].pdata);
		led_array[i].pdata = NULL;
		}
		mutex_destroy(&led_array->lock);
		devm_kfree(&client->dev, led_array);
		led_array = NULL;
		return 0;
		}

		static void aw2016_led_shutdown(struct i2c_client *client)
		{
		struct aw2016_led *led = i2c_get_clientdata(client);

		aw2016_write(led, AW2016_REG_GCR1, AW2016_CHIP_STANDBY);
		}

		static const struct i2c_device_id aw2016_led_id[] = {
		{ "aw2016_led", 0 },
		{},
		};

		MODULE_DEVICE_TABLE(i2c, aw2016_led_id);

		static struct of_device_id aw2016_match_table[] = {
		{
		.compatible = "awinic,aw2016_led",
		},
		{},
		};

		static struct i2c_driver aw2016_led_driver = {
		.probe = aw2016_led_probe,
		.remove = aw2016_led_remove,
		.shutdown = aw2016_led_shutdown,
		.driver = {
		.name = "aw2016_led",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(aw2016_match_table),
		},
		.id_table = aw2016_led_id,
		};

		static int __init aw2016_led_init(void)
		{
		pr_info("%s: driver version: %s\n", __func__, AW2016_DRIVER_VERSION);
		return i2c_add_driver(&aw2016_led_driver);
		}
		module_init(aw2016_led_init);

		static void __exit aw2016_led_exit(void)
		{
		i2c_del_driver(&aw2016_led_driver);
		}
		module_exit(aw2016_led_exit);

		MODULE_AUTHOR("<liweilei@awinic.com.cn>");
		MODULE_DESCRIPTION("AWINIC AW2016 LED driver");
		MODULE_LICENSE("GPL v2");

drivers/leds/leds-aw2016.h

0 → 100644

+39 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2015, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		* only version 2 as published by the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		*/

		#ifndef __LINUX_AW2016_LED_H__
		#define __LINUX_AW2016_LED_H__

		/* The definition of each time described as shown in figure.
		* /-----------\
		* / \| \
		* /\| \| \|\
		* / \| \| \| \-----------
		* \|hold_time_ms \| \|
		* \| \| \|
		* rise_time_ms fall_time_ms \|
		* off_time_ms
		*/

		struct aw2016_platform_data {
		int imax;
		int led_current;
		int rise_time_ms;
		int hold_time_ms;
		int fall_time_ms;
		int off_time_ms;
		struct aw2016_led *led;
		};

		#endif