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Date: Tue, 18 Nov 2014 16:04:54 -0800
From: Bryan Wu <cooloney@...il.com>
To: Dan Murphy <dmurphy@...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
On Tue, Nov 18, 2014 at 3:50 PM, Dan Murphy <dmurphy@...com> wrote:
> 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
>
Yeah, I saw that. 0day is awesome to catch those issues.
I think you can provide a V3 patch and I will use V3 to replace the
old V2 patch and push out again.
Thanks,
-Bryan
>> -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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