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Message-ID: <546BDB3D.8050602@ti.com>
Date: Tue, 18 Nov 2014 17:50:21 -0600
From: Dan Murphy <dmurphy@...com>
To: Bryan Wu <cooloney@...il.com>
CC: lkml <linux-kernel@...r.kernel.org>,
Linux LED Subsystem <linux-leds@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"rpurdie@...ys.net" <rpurdie@...ys.net>
Subject: Re: [PATCH v2] leds: lp8860: Introduce TI lp8860 4 channel LED driver
Bryan
On 11/18/2014 04:56 PM, Bryan Wu wrote:
> On Tue, Nov 18, 2014 at 6:43 AM, Dan Murphy <dmurphy@...com> wrote:
>> Introduce the Texas Instruments lp8860
>> 4 channel LED driver.
>>
>> This driver configures the device in display cluster mode
>> as this seems to be the most used configuration at the
>> time of the driver configuration.
>>
>> For more product information please see the link below:
>> http://www.ti.com/product/lp8860-q1
>>
>> Signed-off-by: Dan Murphy <dmurphy@...com>
>> ---
>>
>> v2 - Fixed commit message spelling, changed flush_work to
>> cancel_work, did not move INIT_WORK as led class is not registered
>> until the end of probe - https://patchwork.kernel.org/patch/5296361
>>
> Thanks for updating, I applied this patch into my tree.
Thank you. Apparently the zero day build found an issue.
Do you want me to fix it? I see a patch already to fix that issue though.
Just let me know I am good either way
Dan
> -Bryan
>
>> .../devicetree/bindings/leds/leds-lp8860.txt | 29 ++
>> drivers/leds/Kconfig | 10 +
>> drivers/leds/Makefile | 1 +
>> drivers/leds/leds-lp8860.c | 491 +++++++++++++++++++++
>> 4 files changed, 531 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/leds/leds-lp8860.txt
>> create mode 100644 drivers/leds/leds-lp8860.c
>>
>> diff --git a/Documentation/devicetree/bindings/leds/leds-lp8860.txt b/Documentation/devicetree/bindings/leds/leds-lp8860.txt
>> new file mode 100644
>> index 0000000..aad38dd
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/leds/leds-lp8860.txt
>> @@ -0,0 +1,29 @@
>> +* Texas Instruments - lp8860 4-Channel LED Driver
>> +
>> +The LP8860-Q1 is an high-efficiency LED
>> +driver with boost controller. It has 4 high-precision
>> +current sinks that can be controlled by a PWM input
>> +signal, a SPI/I2C master, or both.
>> +
>> +Required properties:
>> + - compatible:
>> + "ti,lp8860"
>> + - reg - I2C slave address
>> + - label - Used for naming LEDs
>> +
>> +Optional properties:
>> + - enable-gpio - gpio pin to enable/disable the device.
>> + - supply - "vled" - LED supply
>> +
>> +Example:
>> +
>> +leds: leds@6 {
>> + compatible = "ti,lp8860";
>> + reg = <0x2d>;
>> + label = "display_cluster";
>> + enable-gpio = <&gpio1 28 GPIO_ACTIVE_HIGH>;
>> + vled-supply = <&vbatt>;
>> +}
>> +
>> +For more product information please see the link below:
>> +http://www.ti.com/product/lp8860-q1
>> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
>> index a210338..b0dce59 100644
>> --- a/drivers/leds/Kconfig
>> +++ b/drivers/leds/Kconfig
>> @@ -250,6 +250,16 @@ config LEDS_LP8788
>> help
>> This option enables support for the Keyboard LEDs on the LP8788 PMIC.
>>
>> +config LEDS_LP8860
>> + tristate "LED support for the TI LP8860 4 channel LED driver"
>> + depends on LEDS_CLASS && REGMAP_I2C
>> + help
>> + If you say yes here you get support for the TI LP8860 4 channel
>> + LED driver.
>> + This option enables support for the display cluster LEDs
>> + on the LP8860 4 channel LED driver using the I2C communication
>> + bus.
>> +
>> config LEDS_CLEVO_MAIL
>> tristate "Mail LED on Clevo notebook"
>> depends on LEDS_CLASS
>> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
>> index a2b1647..1c65a19 100644
>> --- a/drivers/leds/Makefile
>> +++ b/drivers/leds/Makefile
>> @@ -28,6 +28,7 @@ obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
>> obj-$(CONFIG_LEDS_LP5562) += leds-lp5562.o
>> obj-$(CONFIG_LEDS_LP8501) += leds-lp8501.o
>> obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
>> +obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o
>> obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o
>> obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
>> obj-$(CONFIG_LEDS_IPAQ_MICRO) += leds-ipaq-micro.o
>> diff --git a/drivers/leds/leds-lp8860.c b/drivers/leds/leds-lp8860.c
>> new file mode 100644
>> index 0000000..54e4eec
>> --- /dev/null
>> +++ b/drivers/leds/leds-lp8860.c
>> @@ -0,0 +1,491 @@
>> +/*
>> + * TI LP8860 4-Channel LED Driver
>> + *
>> + * Copyright (C) 2014 Texas Instruments
>> + *
>> + * Author: Dan Murphy <dmurphy@...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.
>> + *
>> + */
>> +
>> +#include <linux/i2c.h>
>> +#include <linux/init.h>
>> +#include <linux/leds.h>
>> +#include <linux/regmap.h>
>> +#include <linux/regulator/consumer.h>
>> +#include <linux/module.h>
>> +#include <linux/mutex.h>
>> +#include <linux/of.h>
>> +#include <linux/of_gpio.h>
>> +#include <linux/gpio/consumer.h>
>> +#include <linux/slab.h>
>> +
>> +#define LP8860_DISP_CL1_BRT_MSB 0x00
>> +#define LP8860_DISP_CL1_BRT_LSB 0x01
>> +#define LP8860_DISP_CL1_CURR_MSB 0x02
>> +#define LP8860_DISP_CL1_CURR_LSB 0x03
>> +#define LP8860_CL2_BRT_MSB 0x04
>> +#define LP8860_CL2_BRT_LSB 0x05
>> +#define LP8860_CL2_CURRENT 0x06
>> +#define LP8860_CL3_BRT_MSB 0x07
>> +#define LP8860_CL3_BRT_LSB 0x08
>> +#define LP8860_CL3_CURRENT 0x09
>> +#define LP8860_CL4_BRT_MSB 0x0a
>> +#define LP8860_CL4_BRT_LSB 0x0b
>> +#define LP8860_CL4_CURRENT 0x0c
>> +#define LP8860_CONFIG 0x0d
>> +#define LP8860_STATUS 0x0e
>> +#define LP8860_FAULT 0x0f
>> +#define LP8860_LED_FAULT 0x10
>> +#define LP8860_FAULT_CLEAR 0x11
>> +#define LP8860_ID 0x12
>> +#define LP8860_TEMP_MSB 0x13
>> +#define LP8860_TEMP_LSB 0x14
>> +#define LP8860_DISP_LED_CURR_MSB 0x15
>> +#define LP8860_DISP_LED_CURR_LSB 0x16
>> +#define LP8860_DISP_LED_PWM_MSB 0x17
>> +#define LP8860_DISP_LED_PWM_LSB 0x18
>> +#define LP8860_EEPROM_CNTRL 0x19
>> +#define LP8860_EEPROM_UNLOCK 0x1a
>> +
>> +#define LP8860_EEPROM_REG_0 0x60
>> +#define LP8860_EEPROM_REG_1 0x61
>> +#define LP8860_EEPROM_REG_2 0x62
>> +#define LP8860_EEPROM_REG_3 0x63
>> +#define LP8860_EEPROM_REG_4 0x64
>> +#define LP8860_EEPROM_REG_5 0x65
>> +#define LP8860_EEPROM_REG_6 0x66
>> +#define LP8860_EEPROM_REG_7 0x67
>> +#define LP8860_EEPROM_REG_8 0x68
>> +#define LP8860_EEPROM_REG_9 0x69
>> +#define LP8860_EEPROM_REG_10 0x6a
>> +#define LP8860_EEPROM_REG_11 0x6b
>> +#define LP8860_EEPROM_REG_12 0x6c
>> +#define LP8860_EEPROM_REG_13 0x6d
>> +#define LP8860_EEPROM_REG_14 0x6e
>> +#define LP8860_EEPROM_REG_15 0x6f
>> +#define LP8860_EEPROM_REG_16 0x70
>> +#define LP8860_EEPROM_REG_17 0x71
>> +#define LP8860_EEPROM_REG_18 0x72
>> +#define LP8860_EEPROM_REG_19 0x73
>> +#define LP8860_EEPROM_REG_20 0x74
>> +#define LP8860_EEPROM_REG_21 0x75
>> +#define LP8860_EEPROM_REG_22 0x76
>> +#define LP8860_EEPROM_REG_23 0x77
>> +#define LP8860_EEPROM_REG_24 0x78
>> +
>> +#define LP8860_LOCK_EEPROM 0x00
>> +#define LP8860_UNLOCK_EEPROM 0x01
>> +#define LP8860_PROGRAM_EEPROM 0x02
>> +#define LP8860_EEPROM_CODE_1 0x08
>> +#define LP8860_EEPROM_CODE_2 0xba
>> +#define LP8860_EEPROM_CODE_3 0xef
>> +
>> +#define LP8860_CLEAR_FAULTS 0x01
>> +
>> +#define LP8860_DISP_LED_NAME "display_cluster"
>> +
>> +/**
>> + * struct lp8860_led -
>> + * @lock - Lock for reading/writing the device
>> + * @work - Work item used to off load the brightness register writes
>> + * @client - Pointer to the I2C client
>> + * @led_dev - led class device pointer
>> + * @regmap - Devices register map
>> + * @eeprom_regmap - EEPROM register map
>> + * @enable_gpio - VDDIO/EN gpio to enable communication interface
>> + * @regulator - LED supply regulator pointer
>> + * @brightness - Current brightness value requested
>> + * @label - LED label
>> +**/
>> +struct lp8860_led {
>> + struct mutex lock;
>> + struct work_struct work;
>> + struct i2c_client *client;
>> + struct led_classdev led_dev;
>> + struct regmap *regmap;
>> + struct regmap *eeprom_regmap;
>> + struct gpio_desc *enable_gpio;
>> + struct regulator *regulator;
>> + enum led_brightness brightness;
>> + const char *label;
>> +};
>> +
>> +struct lp8860_eeprom_reg {
>> + uint8_t reg;
>> + uint8_t value;
>> +};
>> +
>> +struct lp8860_eeprom_reg lp8860_eeprom_disp_regs[] = {
>> + { LP8860_EEPROM_REG_0, 0xed },
>> + { LP8860_EEPROM_REG_1, 0xdf },
>> + { LP8860_EEPROM_REG_2, 0xdc },
>> + { LP8860_EEPROM_REG_3, 0xf0 },
>> + { LP8860_EEPROM_REG_4, 0xdf },
>> + { LP8860_EEPROM_REG_5, 0xe5 },
>> + { LP8860_EEPROM_REG_6, 0xf2 },
>> + { LP8860_EEPROM_REG_7, 0x77 },
>> + { LP8860_EEPROM_REG_8, 0x77 },
>> + { LP8860_EEPROM_REG_9, 0x71 },
>> + { LP8860_EEPROM_REG_10, 0x3f },
>> + { LP8860_EEPROM_REG_11, 0xb7 },
>> + { LP8860_EEPROM_REG_12, 0x17 },
>> + { LP8860_EEPROM_REG_13, 0xef },
>> + { LP8860_EEPROM_REG_14, 0xb0 },
>> + { LP8860_EEPROM_REG_15, 0x87 },
>> + { LP8860_EEPROM_REG_16, 0xce },
>> + { LP8860_EEPROM_REG_17, 0x72 },
>> + { LP8860_EEPROM_REG_18, 0xe5 },
>> + { LP8860_EEPROM_REG_19, 0xdf },
>> + { LP8860_EEPROM_REG_20, 0x35 },
>> + { LP8860_EEPROM_REG_21, 0x06 },
>> + { LP8860_EEPROM_REG_22, 0xdc },
>> + { LP8860_EEPROM_REG_23, 0x88 },
>> + { LP8860_EEPROM_REG_24, 0x3E },
>> +};
>> +
>> +static int lp8860_unlock_eeprom(struct lp8860_led *led, int lock)
>> +{
>> + int ret;
>> +
>> + mutex_lock(&led->lock);
>> +
>> + if (lock == LP8860_UNLOCK_EEPROM) {
>> + ret = regmap_write(led->regmap,
>> + LP8860_EEPROM_UNLOCK,
>> + LP8860_EEPROM_CODE_1);
>> + if (ret) {
>> + dev_err(&led->client->dev, "EEPROM Unlock failed\n");
>> + goto out;
>> + }
>> +
>> + ret = regmap_write(led->regmap,
>> + LP8860_EEPROM_UNLOCK,
>> + LP8860_EEPROM_CODE_2);
>> + if (ret) {
>> + dev_err(&led->client->dev, "EEPROM Unlock failed\n");
>> + goto out;
>> + }
>> + ret = regmap_write(led->regmap,
>> + LP8860_EEPROM_UNLOCK,
>> + LP8860_EEPROM_CODE_3);
>> + if (ret) {
>> + dev_err(&led->client->dev, "EEPROM Unlock failed\n");
>> + goto out;
>> + }
>> + } else {
>> + ret = regmap_write(led->regmap,
>> + LP8860_EEPROM_UNLOCK,
>> + LP8860_LOCK_EEPROM);
>> + }
>> +
>> +out:
>> + mutex_unlock(&led->lock);
>> + return ret;
>> +}
>> +
>> +static int lp8860_fault_check(struct lp8860_led *led)
>> +{
>> + int ret, fault;
>> + unsigned int read_buf;
>> +
>> + ret = regmap_read(led->regmap, LP8860_LED_FAULT, &read_buf);
>> + if (ret)
>> + goto out;
>> +
>> + fault = read_buf;
>> +
>> + ret = regmap_read(led->regmap, LP8860_FAULT, &read_buf);
>> + if (ret)
>> + goto out;
>> +
>> + fault |= read_buf;
>> +
>> + /* Attempt to clear any faults */
>> + if (fault)
>> + ret = regmap_write(led->regmap, LP8860_FAULT_CLEAR,
>> + LP8860_CLEAR_FAULTS);
>> +out:
>> + return ret;
>> +}
>> +
>> +static void lp8860_led_brightness_work(struct work_struct *work)
>> +{
>> + struct lp8860_led *led = container_of(work, struct lp8860_led, work);
>> + int ret;
>> + int disp_brightness = led->brightness * 255;
>> +
>> + mutex_lock(&led->lock);
>> +
>> + ret = lp8860_fault_check(led);
>> + if (ret) {
>> + dev_err(&led->client->dev, "Cannot read/clear faults\n");
>> + goto out;
>> + }
>> +
>> + ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_MSB,
>> + (disp_brightness & 0xff00) >> 8);
>> + if (ret) {
>> + dev_err(&led->client->dev, "Cannot write CL1 MSB\n");
>> + goto out;
>> + }
>> +
>> + ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_LSB,
>> + disp_brightness & 0xff);
>> + if (ret) {
>> + dev_err(&led->client->dev, "Cannot write CL1 LSB\n");
>> + goto out;
>> + }
>> +out:
>> + mutex_unlock(&led->lock);
>> +}
>> +
>> +static void lp8860_brightness_set(struct led_classdev *led_cdev,
>> + enum led_brightness brt_val)
>> +{
>> + struct lp8860_led *led =
>> + container_of(led_cdev, struct lp8860_led, led_dev);
>> +
>> + led->brightness = brt_val;
>> + schedule_work(&led->work);
>> +}
>> +
>> +static int lp8860_init(struct lp8860_led *led)
>> +{
>> + unsigned int read_buf;
>> + int ret, i, reg_count;
>> +
>> + if (led->enable_gpio)
>> + gpiod_direction_output(led->enable_gpio, 1);
>> +
>> + ret = lp8860_fault_check(led);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_read(led->regmap, LP8860_STATUS, &read_buf);
>> + if (ret)
>> + goto out;
>> +
>> + ret = lp8860_unlock_eeprom(led, LP8860_UNLOCK_EEPROM);
>> + if (ret) {
>> + dev_err(&led->client->dev, "Failed unlocking EEPROM\n");
>> + goto out;
>> + }
>> +
>> + reg_count = ARRAY_SIZE(lp8860_eeprom_disp_regs) / sizeof(lp8860_eeprom_disp_regs[0]);
>> + for (i = 0; i < reg_count; i++) {
>> + ret = regmap_write(led->eeprom_regmap,
>> + lp8860_eeprom_disp_regs[i].reg,
>> + lp8860_eeprom_disp_regs[i].value);
>> + if (ret) {
>> + dev_err(&led->client->dev, "Failed writing EEPROM\n");
>> + goto out;
>> + }
>> + }
>> +
>> + ret = lp8860_unlock_eeprom(led, LP8860_LOCK_EEPROM);
>> + if (ret)
>> + goto out;
>> +
>> + ret = regmap_write(led->regmap,
>> + LP8860_EEPROM_CNTRL,
>> + LP8860_PROGRAM_EEPROM);
>> + if (ret)
>> + dev_err(&led->client->dev, "Failed programming EEPROM\n");
>> +out:
>> + if (ret)
>> + if (led->enable_gpio)
>> + gpiod_direction_output(led->enable_gpio, 0);
>> + return ret;
>> +}
>> +
>> +static struct reg_default lp8860_reg_defs[] = {
>> + { LP8860_DISP_CL1_BRT_MSB, 0x00},
>> + { LP8860_DISP_CL1_BRT_LSB, 0x00},
>> + { LP8860_DISP_CL1_CURR_MSB, 0x00},
>> + { LP8860_DISP_CL1_CURR_LSB, 0x00},
>> + { LP8860_CL2_BRT_MSB, 0x00},
>> + { LP8860_CL2_BRT_LSB, 0x00},
>> + { LP8860_CL2_CURRENT, 0x00},
>> + { LP8860_CL3_BRT_MSB, 0x00},
>> + { LP8860_CL3_BRT_LSB, 0x00},
>> + { LP8860_CL3_CURRENT, 0x00},
>> + { LP8860_CL4_BRT_MSB, 0x00},
>> + { LP8860_CL4_BRT_LSB, 0x00},
>> + { LP8860_CL4_CURRENT, 0x00},
>> + { LP8860_CONFIG, 0x00},
>> + { LP8860_FAULT_CLEAR, 0x00},
>> + { LP8860_EEPROM_CNTRL, 0x80},
>> + { LP8860_EEPROM_UNLOCK, 0x00},
>> +};
>> +
>> +static const struct regmap_config lp8860_regmap_config = {
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = LP8860_EEPROM_UNLOCK,
>> + .reg_defaults = lp8860_reg_defs,
>> + .num_reg_defaults = ARRAY_SIZE(lp8860_reg_defs),
>> + .cache_type = REGCACHE_NONE,
>> +};
>> +
>> +static struct reg_default lp8860_eeprom_defs[] = {
>> + { LP8860_EEPROM_REG_0, 0x00 },
>> + { LP8860_EEPROM_REG_1, 0x00 },
>> + { LP8860_EEPROM_REG_2, 0x00 },
>> + { LP8860_EEPROM_REG_3, 0x00 },
>> + { LP8860_EEPROM_REG_4, 0x00 },
>> + { LP8860_EEPROM_REG_5, 0x00 },
>> + { LP8860_EEPROM_REG_6, 0x00 },
>> + { LP8860_EEPROM_REG_7, 0x00 },
>> + { LP8860_EEPROM_REG_8, 0x00 },
>> + { LP8860_EEPROM_REG_9, 0x00 },
>> + { LP8860_EEPROM_REG_10, 0x00 },
>> + { LP8860_EEPROM_REG_11, 0x00 },
>> + { LP8860_EEPROM_REG_12, 0x00 },
>> + { LP8860_EEPROM_REG_13, 0x00 },
>> + { LP8860_EEPROM_REG_14, 0x00 },
>> + { LP8860_EEPROM_REG_15, 0x00 },
>> + { LP8860_EEPROM_REG_16, 0x00 },
>> + { LP8860_EEPROM_REG_17, 0x00 },
>> + { LP8860_EEPROM_REG_18, 0x00 },
>> + { LP8860_EEPROM_REG_19, 0x00 },
>> + { LP8860_EEPROM_REG_20, 0x00 },
>> + { LP8860_EEPROM_REG_21, 0x00 },
>> + { LP8860_EEPROM_REG_22, 0x00 },
>> + { LP8860_EEPROM_REG_23, 0x00 },
>> + { LP8860_EEPROM_REG_24, 0x00 },
>> +};
>> +
>> +static const struct regmap_config lp8860_eeprom_regmap_config = {
>> + .reg_bits = 8,
>> + .val_bits = 8,
>> +
>> + .max_register = LP8860_EEPROM_REG_24,
>> + .reg_defaults = lp8860_eeprom_defs,
>> + .num_reg_defaults = ARRAY_SIZE(lp8860_eeprom_defs),
>> + .cache_type = REGCACHE_NONE,
>> +};
>> +
>> +static int lp8860_probe(struct i2c_client *client,
>> + const struct i2c_device_id *id)
>> +{
>> + int ret;
>> + struct lp8860_led *led;
>> + struct device_node *np = client->dev.of_node;
>> +
>> + led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
>> + if (!led)
>> + return -ENOMEM;
>> +
>> + led->label = LP8860_DISP_LED_NAME;
>> +
>> + if (client->dev.of_node) {
>> + ret = of_property_read_string(np, "label", &led->label);
>> + if (ret) {
>> + dev_err(&client->dev, "Missing label in dt\n");
>> + return -EINVAL;
>> + }
>> + }
>> +
>> + led->enable_gpio = devm_gpiod_get(&client->dev, "enable");
>> + if (IS_ERR(led->enable_gpio))
>> + led->enable_gpio = NULL;
>> + else
>> + gpiod_direction_output(led->enable_gpio, 0);
>> +
>> + led->regulator = devm_regulator_get(&client->dev, "vled");
>> + if (IS_ERR(led->regulator))
>> + led->regulator = NULL;
>> +
>> + led->client = client;
>> + led->led_dev.name = led->label;
>> + led->led_dev.max_brightness = LED_FULL;
>> + led->led_dev.brightness_set = lp8860_brightness_set;
>> +
>> + mutex_init(&led->lock);
>> + INIT_WORK(&led->work, lp8860_led_brightness_work);
>> +
>> + i2c_set_clientdata(client, led);
>> +
>> + led->regmap = devm_regmap_init_i2c(client, &lp8860_regmap_config);
>> + if (IS_ERR(led->regmap)) {
>> + ret = PTR_ERR(led->regmap);
>> + dev_err(&client->dev, "Failed to allocate register map: %d\n",
>> + ret);
>> + return ret;
>> + }
>> +
>> + led->eeprom_regmap = devm_regmap_init_i2c(client, &lp8860_eeprom_regmap_config);
>> + if (IS_ERR(led->eeprom_regmap)) {
>> + ret = PTR_ERR(led->eeprom_regmap);
>> + dev_err(&client->dev, "Failed to allocate register map: %d\n",
>> + ret);
>> + return ret;
>> + }
>> +
>> + ret = lp8860_init(led);
>> + if (ret)
>> + return ret;
>> +
>> + ret = led_classdev_register(&client->dev, &led->led_dev);
>> + if (ret) {
>> + dev_err(&client->dev, "led register err: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int lp8860_remove(struct i2c_client *client)
>> +{
>> + struct lp8860_led *led = i2c_get_clientdata(client);
>> + int ret;
>> +
>> + led_classdev_unregister(&led->led_dev);
>> + cancel_work_sync(&led->work);
>> +
>> + if (led->enable_gpio)
>> + gpiod_direction_output(led->enable_gpio, 0);
>> +
>> + if (led->regulator) {
>> + ret = regulator_disable(led->regulator);
>> + if (ret)
>> + dev_err(&led->client->dev,
>> + "Failed to disable regulator\n");
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static const struct i2c_device_id lp8860_id[] = {
>> + { "lp8860", 0 },
>> + { }
>> +};
>> +MODULE_DEVICE_TABLE(i2c, lp8860_id);
>> +
>> +#ifdef CONFIG_OF
>> +static const struct of_device_id of_lp8860_leds_match[] = {
>> + { .compatible = "ti,lp8860", },
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(of, of_lp8860_leds_match);
>> +#endif
>> +
>> +static struct i2c_driver lp8860_driver = {
>> + .driver = {
>> + .name = "lp8860",
>> + .of_match_table = of_match_ptr(of_lp8860_leds_match),
>> + },
>> + .probe = lp8860_probe,
>> + .remove = lp8860_remove,
>> + .id_table = lp8860_id,
>> +};
>> +module_i2c_driver(lp8860_driver);
>> +
>> +MODULE_DESCRIPTION("Texas Instruments LP8860 LED drvier");
>> +MODULE_AUTHOR("Dan Murphy <dmurphy@...com>");
>> +MODULE_LICENSE("GPL");
>> --
>> 1.9.1
>>
--
------------------
Dan Murphy
--
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