[linux-block.git] / drivers / leds / leds-lp50xx.c

// SPDX-License-Identifier: GPL-2.0
// TI LP50XX LED chip family driver
// Copyright (C) 2018-20 Texas Instruments Incorporated - https://www.ti.com/

#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <uapi/linux/uleds.h>

#include <linux/led-class-multicolor.h>

#include "leds.h"

#define LP50XX_DEV_CFG0		0x00
#define LP50XX_DEV_CFG1		0x01
#define LP50XX_LED_CFG0		0x02

/* LP5009 and LP5012 registers */
#define LP5012_BNK_BRT		0x03
#define LP5012_BNKA_CLR		0x04
#define LP5012_BNKB_CLR		0x05
#define LP5012_BNKC_CLR		0x06
#define LP5012_LED0_BRT		0x07
#define LP5012_OUT0_CLR		0x0b
#define LP5012_RESET		0x17

/* LP5018 and LP5024 registers */
#define LP5024_BNK_BRT		0x03
#define LP5024_BNKA_CLR		0x04
#define LP5024_BNKB_CLR		0x05
#define LP5024_BNKC_CLR		0x06
#define LP5024_LED0_BRT		0x07
#define LP5024_OUT0_CLR		0x0f
#define LP5024_RESET		0x27

/* LP5030 and LP5036 registers */
#define LP5036_LED_CFG1		0x03
#define LP5036_BNK_BRT		0x04
#define LP5036_BNKA_CLR		0x05
#define LP5036_BNKB_CLR		0x06
#define LP5036_BNKC_CLR		0x07
#define LP5036_LED0_BRT		0x08
#define LP5036_OUT0_CLR		0x14
#define LP5036_RESET		0x38

#define LP50XX_SW_RESET		0xff
#define LP50XX_CHIP_EN		BIT(6)

/* There are 3 LED outputs per bank */
#define LP50XX_LEDS_PER_MODULE	3

#define LP5009_MAX_LED_MODULES	2
#define LP5012_MAX_LED_MODULES	4
#define LP5018_MAX_LED_MODULES	6
#define LP5024_MAX_LED_MODULES	8
#define LP5030_MAX_LED_MODULES	10
#define LP5036_MAX_LED_MODULES	12

static const struct reg_default lp5012_reg_defs[] = {
	{LP50XX_DEV_CFG0, 0x0},
	{LP50XX_DEV_CFG1, 0x3c},
	{LP50XX_LED_CFG0, 0x0},
	{LP5012_BNK_BRT, 0xff},
	{LP5012_BNKA_CLR, 0x0f},
	{LP5012_BNKB_CLR, 0x0f},
	{LP5012_BNKC_CLR, 0x0f},
	{LP5012_LED0_BRT, 0x0f},
	/* LEDX_BRT registers are all 0xff for defaults */
	{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff},
	{LP5012_OUT0_CLR, 0x0f},
	/* OUTX_CLR registers are all 0x0 for defaults */
	{0x0c, 0x00}, {0x0d, 0x00}, {0x0e, 0x00}, {0x0f, 0x00}, {0x10, 0x00},
	{0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00},	{0x15, 0x00},
	{0x16, 0x00},
	{LP5012_RESET, 0x00}
};

static const struct reg_default lp5024_reg_defs[] = {
	{LP50XX_DEV_CFG0, 0x0},
	{LP50XX_DEV_CFG1, 0x3c},
	{LP50XX_LED_CFG0, 0x0},
	{LP5024_BNK_BRT, 0xff},
	{LP5024_BNKA_CLR, 0x0f},
	{LP5024_BNKB_CLR, 0x0f},
	{LP5024_BNKC_CLR, 0x0f},
	{LP5024_LED0_BRT, 0x0f},
	/* LEDX_BRT registers are all 0xff for defaults */
	{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
	{0x0d, 0xff}, {0x0e, 0xff},
	{LP5024_OUT0_CLR, 0x0f},
	/* OUTX_CLR registers are all 0x0 for defaults */
	{0x10, 0x00}, {0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00},
	{0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
	{0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
	{0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
	{0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00},
	{LP5024_RESET, 0x00}
};

static const struct reg_default lp5036_reg_defs[] = {
	{LP50XX_DEV_CFG0, 0x0},
	{LP50XX_DEV_CFG1, 0x3c},
	{LP50XX_LED_CFG0, 0x0},
	{LP5036_LED_CFG1, 0x0},
	{LP5036_BNK_BRT, 0xff},
	{LP5036_BNKA_CLR, 0x0f},
	{LP5036_BNKB_CLR, 0x0f},
	{LP5036_BNKC_CLR, 0x0f},
	{LP5036_LED0_BRT, 0x0f},
	/* LEDX_BRT registers are all 0xff for defaults */
	{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
	{0x0d, 0xff}, {0x0e, 0xff}, {0x0f, 0xff}, {0x10, 0xff}, {0x11, 0xff},
	{0x12, 0xff}, {0x13, 0xff},
	{LP5036_OUT0_CLR, 0x0f},
	/* OUTX_CLR registers are all 0x0 for defaults */
	{0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
	{0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
	{0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
	{0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00},
	{0x29, 0x00}, {0x2a, 0x00}, {0x2b, 0x00}, {0x2c, 0x00}, {0x2d, 0x00},
	{0x2e, 0x00}, {0x2f, 0x00}, {0x30, 0x00}, {0x31, 0x00}, {0x32, 0x00},
	{0x33, 0x00}, {0x34, 0x00}, {0x35, 0x00}, {0x36, 0x00}, {0x37, 0x00},
	{LP5036_RESET, 0x00}
};

static const struct regmap_config lp5012_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = LP5012_RESET,
	.reg_defaults = lp5012_reg_defs,
	.num_reg_defaults = ARRAY_SIZE(lp5012_reg_defs),
	.cache_type = REGCACHE_FLAT,
};

static const struct regmap_config lp5024_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = LP5024_RESET,
	.reg_defaults = lp5024_reg_defs,
	.num_reg_defaults = ARRAY_SIZE(lp5024_reg_defs),
	.cache_type = REGCACHE_FLAT,
};

static const struct regmap_config lp5036_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = LP5036_RESET,
	.reg_defaults = lp5036_reg_defs,
	.num_reg_defaults = ARRAY_SIZE(lp5036_reg_defs),
	.cache_type = REGCACHE_FLAT,
};

enum lp50xx_model {
	LP5009,
	LP5012,
	LP5018,
	LP5024,
	LP5030,
	LP5036,
};

/**
 * struct lp50xx_chip_info -
 * @lp50xx_regmap_config: regmap register configuration
 * @model_id: LED device model
 * @max_modules: total number of supported LED modules
 * @num_leds: number of LED outputs available on the device
 * @led_brightness0_reg: first brightness register of the device
 * @mix_out0_reg: first color mix register of the device
 * @bank_brt_reg: bank brightness register
 * @bank_mix_reg: color mix register
 * @reset_reg: device reset register
 */
struct lp50xx_chip_info {
	const struct regmap_config *lp50xx_regmap_config;
	int model_id;
	u8 max_modules;
	u8 num_leds;
	u8 led_brightness0_reg;
	u8 mix_out0_reg;
	u8 bank_brt_reg;
	u8 bank_mix_reg;
	u8 reset_reg;
};

static const struct lp50xx_chip_info lp50xx_chip_info_tbl[] = {
	[LP5009] = {
		.model_id = LP5009,
		.max_modules = LP5009_MAX_LED_MODULES,
		.num_leds = LP5009_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
		.led_brightness0_reg = LP5012_LED0_BRT,
		.mix_out0_reg = LP5012_OUT0_CLR,
		.bank_brt_reg = LP5012_BNK_BRT,
		.bank_mix_reg = LP5012_BNKA_CLR,
		.reset_reg = LP5012_RESET,
		.lp50xx_regmap_config = &lp5012_regmap_config,
	},
	[LP5012] = {
		.model_id = LP5012,
		.max_modules = LP5012_MAX_LED_MODULES,
		.num_leds = LP5012_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
		.led_brightness0_reg = LP5012_LED0_BRT,
		.mix_out0_reg = LP5012_OUT0_CLR,
		.bank_brt_reg = LP5012_BNK_BRT,
		.bank_mix_reg = LP5012_BNKA_CLR,
		.reset_reg = LP5012_RESET,
		.lp50xx_regmap_config = &lp5012_regmap_config,
	},
	[LP5018] = {
		.model_id = LP5018,
		.max_modules = LP5018_MAX_LED_MODULES,
		.num_leds = LP5018_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
		.led_brightness0_reg = LP5024_LED0_BRT,
		.mix_out0_reg = LP5024_OUT0_CLR,
		.bank_brt_reg = LP5024_BNK_BRT,
		.bank_mix_reg = LP5024_BNKA_CLR,
		.reset_reg = LP5024_RESET,
		.lp50xx_regmap_config = &lp5024_regmap_config,
	},
	[LP5024] = {
		.model_id = LP5024,
		.max_modules = LP5024_MAX_LED_MODULES,
		.num_leds = LP5024_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
		.led_brightness0_reg = LP5024_LED0_BRT,
		.mix_out0_reg = LP5024_OUT0_CLR,
		.bank_brt_reg = LP5024_BNK_BRT,
		.bank_mix_reg = LP5024_BNKA_CLR,
		.reset_reg = LP5024_RESET,
		.lp50xx_regmap_config = &lp5024_regmap_config,
	},
	[LP5030] = {
		.model_id = LP5030,
		.max_modules = LP5030_MAX_LED_MODULES,
		.num_leds = LP5030_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
		.led_brightness0_reg = LP5036_LED0_BRT,
		.mix_out0_reg = LP5036_OUT0_CLR,
		.bank_brt_reg = LP5036_BNK_BRT,
		.bank_mix_reg = LP5036_BNKA_CLR,
		.reset_reg = LP5036_RESET,
		.lp50xx_regmap_config = &lp5036_regmap_config,
	},
	[LP5036] = {
		.model_id = LP5036,
		.max_modules = LP5036_MAX_LED_MODULES,
		.num_leds = LP5036_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
		.led_brightness0_reg = LP5036_LED0_BRT,
		.mix_out0_reg = LP5036_OUT0_CLR,
		.bank_brt_reg = LP5036_BNK_BRT,
		.bank_mix_reg = LP5036_BNKA_CLR,
		.reset_reg = LP5036_RESET,
		.lp50xx_regmap_config = &lp5036_regmap_config,
	},
};

struct lp50xx_led {
	struct led_classdev_mc mc_cdev;
	struct lp50xx *priv;
	unsigned long bank_modules;
	int led_intensity[LP50XX_LEDS_PER_MODULE];
	u8 ctrl_bank_enabled;
	int led_number;
};

/**
 * struct lp50xx -
 * @enable_gpio: hardware enable gpio
 * @regulator: LED supply regulator pointer
 * @client: pointer to the I2C client
 * @regmap: device register map
 * @dev: pointer to the devices device struct
 * @lock: lock for reading/writing the device
 * @chip_info: chip specific information (ie num_leds)
 * @num_of_banked_leds: holds the number of banked LEDs
 * @leds: array of LED strings
 */
struct lp50xx {
	struct gpio_desc *enable_gpio;
	struct regulator *regulator;
	struct i2c_client *client;
	struct regmap *regmap;
	struct device *dev;
	struct mutex lock;
	const struct lp50xx_chip_info *chip_info;
	int num_of_banked_leds;

	/* This needs to be at the end of the struct */
	struct lp50xx_led leds[];
};

static struct lp50xx_led *mcled_cdev_to_led(struct led_classdev_mc *mc_cdev)
{
	return container_of(mc_cdev, struct lp50xx_led, mc_cdev);
}

static int lp50xx_brightness_set(struct led_classdev *cdev,
			     enum led_brightness brightness)
{
	struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
	struct lp50xx_led *led = mcled_cdev_to_led(mc_dev);
	const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
	u8 led_offset, reg_val;
	int ret = 0;
	int i;

	mutex_lock(&led->priv->lock);
	if (led->ctrl_bank_enabled)
		reg_val = led_chip->bank_brt_reg;
	else
		reg_val = led_chip->led_brightness0_reg +
			  led->led_number;

	ret = regmap_write(led->priv->regmap, reg_val, brightness);
	if (ret) {
		dev_err(&led->priv->client->dev,
			"Cannot write brightness value %d\n", ret);
		goto out;
	}

	for (i = 0; i < led->mc_cdev.num_colors; i++) {
		if (led->ctrl_bank_enabled) {
			reg_val = led_chip->bank_mix_reg + i;
		} else {
			led_offset = (led->led_number * 3) + i;
			reg_val = led_chip->mix_out0_reg + led_offset;
		}

		ret = regmap_write(led->priv->regmap, reg_val,
				   mc_dev->subled_info[i].intensity);
		if (ret) {
			dev_err(&led->priv->client->dev,
				"Cannot write intensity value %d\n", ret);
			goto out;
		}
	}
out:
	mutex_unlock(&led->priv->lock);
	return ret;
}

static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
{
	u8 led_config_lo, led_config_hi;
	u32 bank_enable_mask = 0;
	int ret;
	int i;

	for (i = 0; i < priv->chip_info->max_modules; i++) {
		if (led_banks[i])
			bank_enable_mask |= (1 << led_banks[i]);
	}

	led_config_lo = (u8)(bank_enable_mask & 0xff);
	led_config_hi = (u8)(bank_enable_mask >> 8) & 0xff;

	ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_config_lo);
	if (ret)
		return ret;

	if (priv->chip_info->model_id >= LP5030)
		ret = regmap_write(priv->regmap, LP5036_LED_CFG1, led_config_hi);

	return ret;
}

static int lp50xx_reset(struct lp50xx *priv)
{
	return regmap_write(priv->regmap, priv->chip_info->reset_reg, LP50XX_SW_RESET);
}

static int lp50xx_enable_disable(struct lp50xx *priv, int enable_disable)
{
	int ret;

	if (priv->enable_gpio) {
		ret = gpiod_direction_output(priv->enable_gpio, enable_disable);
		if (ret)
			return ret;
	}

	if (enable_disable)
		return regmap_write(priv->regmap, LP50XX_DEV_CFG0, LP50XX_CHIP_EN);
	else
		return regmap_write(priv->regmap, LP50XX_DEV_CFG0, 0);

}

static int lp50xx_probe_leds(struct fwnode_handle *child, struct lp50xx *priv,
			     struct lp50xx_led *led, int num_leds)
{
	u32 led_banks[LP5036_MAX_LED_MODULES] = {0};
	int led_number;
	int ret;

	if (num_leds > 1) {
		if (num_leds > priv->chip_info->max_modules) {
			dev_err(&priv->client->dev, "reg property is invalid\n");
			return -EINVAL;
		}

		priv->num_of_banked_leds = num_leds;

		ret = fwnode_property_read_u32_array(child, "reg", led_banks, num_leds);
		if (ret) {
			dev_err(&priv->client->dev, "reg property is missing\n");
			return ret;
		}

		ret = lp50xx_set_banks(priv, led_banks);
		if (ret) {
			dev_err(&priv->client->dev, "Cannot setup banked LEDs\n");
			return ret;
		}

		led->ctrl_bank_enabled = 1;
	} else {
		ret = fwnode_property_read_u32(child, "reg", &led_number);
		if (ret) {
			dev_err(&priv->client->dev, "led reg property missing\n");
			return ret;
		}

		if (led_number > priv->chip_info->num_leds) {
			dev_err(&priv->client->dev, "led-sources property is invalid\n");
			return -EINVAL;
		}

		led->led_number = led_number;
	}

	return 0;
}

static int lp50xx_probe_dt(struct lp50xx *priv)
{
	struct fwnode_handle *child = NULL;
	struct fwnode_handle *led_node = NULL;
	struct led_init_data init_data = {};
	struct led_classdev *led_cdev;
	struct mc_subled *mc_led_info;
	struct lp50xx_led *led;
	int ret = -EINVAL;
	int num_colors;
	u32 color_id;
	int i = 0;

	priv->enable_gpio = devm_gpiod_get_optional(priv->dev, "enable", GPIOD_OUT_LOW);
	if (IS_ERR(priv->enable_gpio))
		return dev_err_probe(priv->dev, PTR_ERR(priv->enable_gpio),
				     "Failed to get enable GPIO\n");

	priv->regulator = devm_regulator_get(priv->dev, "vled");
	if (IS_ERR(priv->regulator))
		priv->regulator = NULL;

	device_for_each_child_node(priv->dev, child) {
		led = &priv->leds[i];
		ret = fwnode_property_count_u32(child, "reg");
		if (ret < 0) {
			dev_err(&priv->client->dev, "reg property is invalid\n");
			goto child_out;
		}

		ret = lp50xx_probe_leds(child, priv, led, ret);
		if (ret)
			goto child_out;

		init_data.fwnode = child;
		num_colors = 0;

		/*
		 * There are only 3 LEDs per module otherwise they should be
		 * banked which also is presented as 3 LEDs.
		 */
		mc_led_info = devm_kcalloc(priv->dev, LP50XX_LEDS_PER_MODULE,
					   sizeof(*mc_led_info), GFP_KERNEL);
		if (!mc_led_info) {
			ret = -ENOMEM;
			goto child_out;
		}

		fwnode_for_each_child_node(child, led_node) {
			ret = fwnode_property_read_u32(led_node, "color",
						       &color_id);
			if (ret) {
				dev_err(priv->dev, "Cannot read color\n");
				goto child_out;
			}

			mc_led_info[num_colors].color_index = color_id;
			num_colors++;
		}

		led->priv = priv;
		led->mc_cdev.num_colors = num_colors;
		led->mc_cdev.subled_info = mc_led_info;
		led_cdev = &led->mc_cdev.led_cdev;
		led_cdev->brightness_set_blocking = lp50xx_brightness_set;

		ret = devm_led_classdev_multicolor_register_ext(&priv->client->dev,
						       &led->mc_cdev,
						       &init_data);
		if (ret) {
			dev_err(&priv->client->dev, "led register err: %d\n",
				ret);
			goto child_out;
		}
		i++;
		fwnode_handle_put(child);
	}

	return 0;

child_out:
	fwnode_handle_put(child);
	return ret;
}

static int lp50xx_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct lp50xx *led;
	int count;
	int ret;

	count = device_get_child_node_count(&client->dev);
	if (!count) {
		dev_err(&client->dev, "LEDs are not defined in device tree!");
		return -ENODEV;
	}

	led = devm_kzalloc(&client->dev, struct_size(led, leds, count),
			   GFP_KERNEL);
	if (!led)
		return -ENOMEM;

	mutex_init(&led->lock);
	led->client = client;
	led->dev = &client->dev;
	led->chip_info = &lp50xx_chip_info_tbl[id->driver_data];
	i2c_set_clientdata(client, led);
	led->regmap = devm_regmap_init_i2c(client,
					led->chip_info->lp50xx_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;
	}

	ret = lp50xx_reset(led);
	if (ret)
		return ret;

	ret = lp50xx_enable_disable(led, 1);
	if (ret)
		return ret;

	return lp50xx_probe_dt(led);
}

static int lp50xx_remove(struct i2c_client *client)
{
	struct lp50xx *led = i2c_get_clientdata(client);
	int ret;

	ret = lp50xx_enable_disable(led, 0);
	if (ret) {
		dev_err(&led->client->dev, "Failed to disable chip\n");
		return ret;
	}

	if (led->regulator) {
		ret = regulator_disable(led->regulator);
		if (ret)
			dev_err(&led->client->dev,
				"Failed to disable regulator\n");
	}

	mutex_destroy(&led->lock);

	return 0;
}

static const struct i2c_device_id lp50xx_id[] = {
	{ "lp5009", LP5009 },
	{ "lp5012", LP5012 },
	{ "lp5018", LP5018 },
	{ "lp5024", LP5024 },
	{ "lp5030", LP5030 },
	{ "lp5036", LP5036 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, lp50xx_id);

static const struct of_device_id of_lp50xx_leds_match[] = {
	{ .compatible = "ti,lp5009", .data = (void *)LP5009 },
	{ .compatible = "ti,lp5012", .data = (void *)LP5012 },
	{ .compatible = "ti,lp5018", .data = (void *)LP5018 },
	{ .compatible = "ti,lp5024", .data = (void *)LP5024 },
	{ .compatible = "ti,lp5030", .data = (void *)LP5030 },
	{ .compatible = "ti,lp5036", .data = (void *)LP5036 },
	{},
};
MODULE_DEVICE_TABLE(of, of_lp50xx_leds_match);

static struct i2c_driver lp50xx_driver = {
	.driver = {
		.name	= "lp50xx",
		.of_match_table = of_lp50xx_leds_match,
	},
	.probe		= lp50xx_probe,
	.remove		= lp50xx_remove,
	.id_table	= lp50xx_id,
};
module_i2c_driver(lp50xx_driver);

MODULE_DESCRIPTION("Texas Instruments LP50XX LED driver");
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
242b8117 DM	1	// SPDX-License-Identifier: GPL-2.0
	2	// TI LP50XX LED chip family driver
	3	// Copyright (C) 2018-20 Texas Instruments Incorporated - https://www.ti.com/
	4
	5	#include <linux/gpio/consumer.h>
	6	#include <linux/i2c.h>
	7	#include <linux/init.h>
	8	#include <linux/leds.h>
	9	#include <linux/module.h>
	10	#include <linux/mutex.h>
	11	#include <linux/of.h>
	12	#include <linux/of_gpio.h>
	13	#include <linux/regmap.h>
	14	#include <linux/regulator/consumer.h>
	15	#include <linux/slab.h>
	16	#include <uapi/linux/uleds.h>
	17
	18	#include <linux/led-class-multicolor.h>
	19
	20	#include "leds.h"
	21
	22	#define LP50XX_DEV_CFG0 0x00
	23	#define LP50XX_DEV_CFG1 0x01
	24	#define LP50XX_LED_CFG0 0x02
	25
	26	/* LP5009 and LP5012 registers */
	27	#define LP5012_BNK_BRT 0x03
	28	#define LP5012_BNKA_CLR 0x04
	29	#define LP5012_BNKB_CLR 0x05
	30	#define LP5012_BNKC_CLR 0x06
	31	#define LP5012_LED0_BRT 0x07
	32	#define LP5012_OUT0_CLR 0x0b
	33	#define LP5012_RESET 0x17
	34
	35	/* LP5018 and LP5024 registers */
	36	#define LP5024_BNK_BRT 0x03
	37	#define LP5024_BNKA_CLR 0x04
	38	#define LP5024_BNKB_CLR 0x05
	39	#define LP5024_BNKC_CLR 0x06
	40	#define LP5024_LED0_BRT 0x07
	41	#define LP5024_OUT0_CLR 0x0f
	42	#define LP5024_RESET 0x27
	43
	44	/* LP5030 and LP5036 registers */
	45	#define LP5036_LED_CFG1 0x03
	46	#define LP5036_BNK_BRT 0x04
	47	#define LP5036_BNKA_CLR 0x05
	48	#define LP5036_BNKB_CLR 0x06
	49	#define LP5036_BNKC_CLR 0x07
	50	#define LP5036_LED0_BRT 0x08
	51	#define LP5036_OUT0_CLR 0x14
	52	#define LP5036_RESET 0x38
	53
	54	#define LP50XX_SW_RESET 0xff
	55	#define LP50XX_CHIP_EN BIT(6)
	56
	57	/* There are 3 LED outputs per bank */
	58	#define LP50XX_LEDS_PER_MODULE 3
	59
	60	#define LP5009_MAX_LED_MODULES 2
	61	#define LP5012_MAX_LED_MODULES 4
	62	#define LP5018_MAX_LED_MODULES 6
	63	#define LP5024_MAX_LED_MODULES 8
	64	#define LP5030_MAX_LED_MODULES 10
65	#define LP5036_MAX_LED_MODULES 12
66
67	static const struct reg_default lp5012_reg_defs[] = {
68	{LP50XX_DEV_CFG0, 0x0},
69	{LP50XX_DEV_CFG1, 0x3c},
70	{LP50XX_LED_CFG0, 0x0},
71	{LP5012_BNK_BRT, 0xff},
72	{LP5012_BNKA_CLR, 0x0f},
73	{LP5012_BNKB_CLR, 0x0f},
74	{LP5012_BNKC_CLR, 0x0f},
75	{LP5012_LED0_BRT, 0x0f},
76	/* LEDX_BRT registers are all 0xff for defaults */
77	{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff},
78	{LP5012_OUT0_CLR, 0x0f},
79	/* OUTX_CLR registers are all 0x0 for defaults */
80	{0x0c, 0x00}, {0x0d, 0x00}, {0x0e, 0x00}, {0x0f, 0x00}, {0x10, 0x00},
81	{0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00}, {0x15, 0x00},
82	{0x16, 0x00},
83	{LP5012_RESET, 0x00}
84	};
85
86	static const struct reg_default lp5024_reg_defs[] = {
87	{LP50XX_DEV_CFG0, 0x0},
88	{LP50XX_DEV_CFG1, 0x3c},
89	{LP50XX_LED_CFG0, 0x0},
90	{LP5024_BNK_BRT, 0xff},
91	{LP5024_BNKA_CLR, 0x0f},
92	{LP5024_BNKB_CLR, 0x0f},
93	{LP5024_BNKC_CLR, 0x0f},
94	{LP5024_LED0_BRT, 0x0f},
95	/* LEDX_BRT registers are all 0xff for defaults */
96	{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
97	{0x0d, 0xff}, {0x0e, 0xff},
98	{LP5024_OUT0_CLR, 0x0f},
99	/* OUTX_CLR registers are all 0x0 for defaults */
100	{0x10, 0x00}, {0x11, 0x00}, {0x12, 0x00}, {0x13, 0x00}, {0x14, 0x00},
101	{0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
102	{0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
103	{0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
104	{0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00},
105	{LP5024_RESET, 0x00}
106	};
107
108	static const struct reg_default lp5036_reg_defs[] = {
109	{LP50XX_DEV_CFG0, 0x0},
110	{LP50XX_DEV_CFG1, 0x3c},
111	{LP50XX_LED_CFG0, 0x0},
112	{LP5036_LED_CFG1, 0x0},
113	{LP5036_BNK_BRT, 0xff},
114	{LP5036_BNKA_CLR, 0x0f},
115	{LP5036_BNKB_CLR, 0x0f},
116	{LP5036_BNKC_CLR, 0x0f},
117	{LP5036_LED0_BRT, 0x0f},
118	/* LEDX_BRT registers are all 0xff for defaults */
119	{0x08, 0xff}, {0x09, 0xff}, {0x0a, 0xff}, {0x0b, 0xff}, {0x0c, 0xff},
120	{0x0d, 0xff}, {0x0e, 0xff}, {0x0f, 0xff}, {0x10, 0xff}, {0x11, 0xff},
121	{0x12, 0xff}, {0x13, 0xff},
122	{LP5036_OUT0_CLR, 0x0f},
123	/* OUTX_CLR registers are all 0x0 for defaults */
124	{0x15, 0x00}, {0x16, 0x00}, {0x17, 0x00}, {0x18, 0x00}, {0x19, 0x00},
125	{0x1a, 0x00}, {0x1b, 0x00}, {0x1c, 0x00}, {0x1d, 0x00}, {0x1e, 0x00},
126	{0x1f, 0x00}, {0x20, 0x00}, {0x21, 0x00}, {0x22, 0x00}, {0x23, 0x00},
127	{0x24, 0x00}, {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00},
128	{0x29, 0x00}, {0x2a, 0x00}, {0x2b, 0x00}, {0x2c, 0x00}, {0x2d, 0x00},
129	{0x2e, 0x00}, {0x2f, 0x00}, {0x30, 0x00}, {0x31, 0x00}, {0x32, 0x00},
130	{0x33, 0x00}, {0x34, 0x00}, {0x35, 0x00}, {0x36, 0x00}, {0x37, 0x00},
131	{LP5036_RESET, 0x00}
132	};
133
134	static const struct regmap_config lp5012_regmap_config = {
135	.reg_bits = 8,
136	.val_bits = 8,
137
138	.max_register = LP5012_RESET,
139	.reg_defaults = lp5012_reg_defs,
140	.num_reg_defaults = ARRAY_SIZE(lp5012_reg_defs),
141	.cache_type = REGCACHE_FLAT,
142	};
143
144	static const struct regmap_config lp5024_regmap_config = {
145	.reg_bits = 8,
146	.val_bits = 8,
147
148	.max_register = LP5024_RESET,
149	.reg_defaults = lp5024_reg_defs,
150	.num_reg_defaults = ARRAY_SIZE(lp5024_reg_defs),
151	.cache_type = REGCACHE_FLAT,
152	};
153
154	static const struct regmap_config lp5036_regmap_config = {
155	.reg_bits = 8,
156	.val_bits = 8,
157
158	.max_register = LP5036_RESET,
159	.reg_defaults = lp5036_reg_defs,
160	.num_reg_defaults = ARRAY_SIZE(lp5036_reg_defs),
161	.cache_type = REGCACHE_FLAT,
162	};
163
164	enum lp50xx_model {
165	LP5009,
166	LP5012,
167	LP5018,
168	LP5024,
169	LP5030,
170	LP5036,
171	};
172
173	/**
174	* struct lp50xx_chip_info -
175	* @lp50xx_regmap_config: regmap register configuration
176	* @model_id: LED device model
177	* @max_modules: total number of supported LED modules
178	* @num_leds: number of LED outputs available on the device
179	* @led_brightness0_reg: first brightness register of the device
180	* @mix_out0_reg: first color mix register of the device
181	* @bank_brt_reg: bank brightness register
182	* @bank_mix_reg: color mix register
183	* @reset_reg: device reset register
184	*/
185	struct lp50xx_chip_info {
186	const struct regmap_config *lp50xx_regmap_config;
187	int model_id;
188	u8 max_modules;
189	u8 num_leds;
190	u8 led_brightness0_reg;
191	u8 mix_out0_reg;
192	u8 bank_brt_reg;
193	u8 bank_mix_reg;
194	u8 reset_reg;
195	};
196
197	static const struct lp50xx_chip_info lp50xx_chip_info_tbl[] = {
198	[LP5009] = {
199	.model_id = LP5009,
200	.max_modules = LP5009_MAX_LED_MODULES,
201	.num_leds = LP5009_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
202	.led_brightness0_reg = LP5012_LED0_BRT,
203	.mix_out0_reg = LP5012_OUT0_CLR,
204	.bank_brt_reg = LP5012_BNK_BRT,
205	.bank_mix_reg = LP5012_BNKA_CLR,
206	.reset_reg = LP5012_RESET,
207	.lp50xx_regmap_config = &lp5012_regmap_config,
208	},
209	[LP5012] = {
210	.model_id = LP5012,
211	.max_modules = LP5012_MAX_LED_MODULES,
212	.num_leds = LP5012_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
213	.led_brightness0_reg = LP5012_LED0_BRT,
214	.mix_out0_reg = LP5012_OUT0_CLR,
215	.bank_brt_reg = LP5012_BNK_BRT,
216	.bank_mix_reg = LP5012_BNKA_CLR,
217	.reset_reg = LP5012_RESET,
218	.lp50xx_regmap_config = &lp5012_regmap_config,
219	},
220	[LP5018] = {
221	.model_id = LP5018,
222	.max_modules = LP5018_MAX_LED_MODULES,
223	.num_leds = LP5018_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
224	.led_brightness0_reg = LP5024_LED0_BRT,
225	.mix_out0_reg = LP5024_OUT0_CLR,
226	.bank_brt_reg = LP5024_BNK_BRT,
227	.bank_mix_reg = LP5024_BNKA_CLR,
228	.reset_reg = LP5024_RESET,
229	.lp50xx_regmap_config = &lp5024_regmap_config,
230	},
231	[LP5024] = {
232	.model_id = LP5024,
233	.max_modules = LP5024_MAX_LED_MODULES,
234	.num_leds = LP5024_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
235	.led_brightness0_reg = LP5024_LED0_BRT,
236	.mix_out0_reg = LP5024_OUT0_CLR,
237	.bank_brt_reg = LP5024_BNK_BRT,
238	.bank_mix_reg = LP5024_BNKA_CLR,
239	.reset_reg = LP5024_RESET,
240	.lp50xx_regmap_config = &lp5024_regmap_config,
241	},
242	[LP5030] = {
243	.model_id = LP5030,
244	.max_modules = LP5030_MAX_LED_MODULES,
245	.num_leds = LP5030_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
246	.led_brightness0_reg = LP5036_LED0_BRT,
247	.mix_out0_reg = LP5036_OUT0_CLR,
248	.bank_brt_reg = LP5036_BNK_BRT,
249	.bank_mix_reg = LP5036_BNKA_CLR,
250	.reset_reg = LP5036_RESET,
251	.lp50xx_regmap_config = &lp5036_regmap_config,
252	},
253	[LP5036] = {
254	.model_id = LP5036,
255	.max_modules = LP5036_MAX_LED_MODULES,
256	.num_leds = LP5036_MAX_LED_MODULES * LP50XX_LEDS_PER_MODULE,
257	.led_brightness0_reg = LP5036_LED0_BRT,
258	.mix_out0_reg = LP5036_OUT0_CLR,
259	.bank_brt_reg = LP5036_BNK_BRT,
260	.bank_mix_reg = LP5036_BNKA_CLR,
261	.reset_reg = LP5036_RESET,
262	.lp50xx_regmap_config = &lp5036_regmap_config,
263	},
264	};
265
266	struct lp50xx_led {
267	struct led_classdev_mc mc_cdev;
268	struct lp50xx *priv;
269	unsigned long bank_modules;
270	int led_intensity[LP50XX_LEDS_PER_MODULE];
271	u8 ctrl_bank_enabled;
272	int led_number;
273	};
274
275	/**
276	* struct lp50xx -
277	* @enable_gpio: hardware enable gpio
278	* @regulator: LED supply regulator pointer
279	* @client: pointer to the I2C client
280	* @regmap: device register map
281	* @dev: pointer to the devices device struct
282	* @lock: lock for reading/writing the device
283	* @chip_info: chip specific information (ie num_leds)
284	* @num_of_banked_leds: holds the number of banked LEDs
285	* @leds: array of LED strings
286	*/
287	struct lp50xx {
288	struct gpio_desc *enable_gpio;
289	struct regulator *regulator;
290	struct i2c_client *client;
291	struct regmap *regmap;
292	struct device *dev;
293	struct mutex lock;
294	const struct lp50xx_chip_info *chip_info;
295	int num_of_banked_leds;
296
297	/* This needs to be at the end of the struct */
298	struct lp50xx_led leds[];
299	};
300
301	static struct lp50xx_led mcled_cdev_to_led(struct led_classdev_mc mc_cdev)
302	{
303	return container_of(mc_cdev, struct lp50xx_led, mc_cdev);
304	}
305
306	static int lp50xx_brightness_set(struct led_classdev *cdev,
307	enum led_brightness brightness)
308	{
309	struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
310	struct lp50xx_led *led = mcled_cdev_to_led(mc_dev);
311	const struct lp50xx_chip_info *led_chip = led->priv->chip_info;
312	u8 led_offset, reg_val;
313	int ret = 0;
314	int i;
315
316	mutex_lock(&led->priv->lock);
317	if (led->ctrl_bank_enabled)
318	reg_val = led_chip->bank_brt_reg;
319	else
320	reg_val = led_chip->led_brightness0_reg +
321	led->led_number;
322
323	ret = regmap_write(led->priv->regmap, reg_val, brightness);
324	if (ret) {
325	dev_err(&led->priv->client->dev,
326	"Cannot write brightness value %d\n", ret);
327	goto out;
328	}
329
330	for (i = 0; i < led->mc_cdev.num_colors; i++) {
331	if (led->ctrl_bank_enabled) {
332	reg_val = led_chip->bank_mix_reg + i;
333	} else {
334	led_offset = (led->led_number * 3) + i;
335	reg_val = led_chip->mix_out0_reg + led_offset;
336	}
337
338	ret = regmap_write(led->priv->regmap, reg_val,
339	mc_dev->subled_info[i].intensity);
340	if (ret) {
341	dev_err(&led->priv->client->dev,
342	"Cannot write intensity value %d\n", ret);
343	goto out;
344	}
345	}
346	out:
347	mutex_unlock(&led->priv->lock);
348	return ret;
349	}
350
351	static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
352	{
353	u8 led_config_lo, led_config_hi;
354	u32 bank_enable_mask = 0;
355	int ret;
356	int i;
357
358	for (i = 0; i < priv->chip_info->max_modules; i++) {
359	if (led_banks[i])
360	bank_enable_mask \|= (1 << led_banks[i]);
361	}
362
363	led_config_lo = (u8)(bank_enable_mask & 0xff);
364	led_config_hi = (u8)(bank_enable_mask >> 8) & 0xff;
365
366	ret = regmap_write(priv->regmap, LP50XX_LED_CFG0, led_config_lo);
367	if (ret)
368	return ret;
369
370	if (priv->chip_info->model_id >= LP5030)
371	ret = regmap_write(priv->regmap, LP5036_LED_CFG1, led_config_hi);
372
373	return ret;
374	}
375
376	static int lp50xx_reset(struct lp50xx *priv)
377	{
378	return regmap_write(priv->regmap, priv->chip_info->reset_reg, LP50XX_SW_RESET);
379	}
380
381	static int lp50xx_enable_disable(struct lp50xx *priv, int enable_disable)
382	{
383	int ret;
384
385	if (priv->enable_gpio) {
386	ret = gpiod_direction_output(priv->enable_gpio, enable_disable);
387	if (ret)
388	return ret;
389	}
390
391	if (enable_disable)
392	return regmap_write(priv->regmap, LP50XX_DEV_CFG0, LP50XX_CHIP_EN);
393	else
394	return regmap_write(priv->regmap, LP50XX_DEV_CFG0, 0);
395
396	}
397
398	static int lp50xx_probe_leds(struct fwnode_handle child, struct lp50xx priv,
399	struct lp50xx_led *led, int num_leds)
400	{
401	u32 led_banks[LP5036_MAX_LED_MODULES] = {0};
402	int led_number;
403	int ret;
404
405	if (num_leds > 1) {
406	if (num_leds > priv->chip_info->max_modules) {
407	dev_err(&priv->client->dev, "reg property is invalid\n");
408	return -EINVAL;
409	}
410
411	priv->num_of_banked_leds = num_leds;
412
413	ret = fwnode_property_read_u32_array(child, "reg", led_banks, num_leds);
414	if (ret) {
415	dev_err(&priv->client->dev, "reg property is missing\n");
416	return ret;
417	}
418
419	ret = lp50xx_set_banks(priv, led_banks);
420	if (ret) {
421	dev_err(&priv->client->dev, "Cannot setup banked LEDs\n");
422	return ret;
423	}
424
425	led->ctrl_bank_enabled = 1;
426	} else {
427	ret = fwnode_property_read_u32(child, "reg", &led_number);
428	if (ret) {
429	dev_err(&priv->client->dev, "led reg property missing\n");
430	return ret;
431	}
432
433	if (led_number > priv->chip_info->num_leds) {
434	dev_err(&priv->client->dev, "led-sources property is invalid\n");
435	return -EINVAL;
436	}
437
438	led->led_number = led_number;
439	}
440
441	return 0;
442	}
443
444	static int lp50xx_probe_dt(struct lp50xx *priv)
445	{
446	struct fwnode_handle *child = NULL;
447	struct fwnode_handle *led_node = NULL;
448	struct led_init_data init_data = {};
449	struct led_classdev *led_cdev;
450	struct mc_subled *mc_led_info;
451	struct lp50xx_led *led;
452	int ret = -EINVAL;
453	int num_colors;
454	u32 color_id;
455	int i = 0;
456
457	priv->enable_gpio = devm_gpiod_get_optional(priv->dev, "enable", GPIOD_OUT_LOW);
9a10def9 AS	458	if (IS_ERR(priv->enable_gpio))
	459	return dev_err_probe(priv->dev, PTR_ERR(priv->enable_gpio),
	460	"Failed to get enable GPIO\n");
242b8117 DM	461
	462	priv->regulator = devm_regulator_get(priv->dev, "vled");
	463	if (IS_ERR(priv->regulator))
	464	priv->regulator = NULL;
	465
	466	device_for_each_child_node(priv->dev, child) {
	467	led = &priv->leds[i];
	468	ret = fwnode_property_count_u32(child, "reg");
	469	if (ret < 0) {
	470	dev_err(&priv->client->dev, "reg property is invalid\n");
	471	goto child_out;
	472	}
	473
	474	ret = lp50xx_probe_leds(child, priv, led, ret);
	475	if (ret)
	476	goto child_out;
	477
	478	init_data.fwnode = child;
	479	num_colors = 0;
	480
	481	/*
	482	* There are only 3 LEDs per module otherwise they should be
	483	* banked which also is presented as 3 LEDs.
	484	*/
	485	mc_led_info = devm_kcalloc(priv->dev, LP50XX_LEDS_PER_MODULE,
	486	sizeof(*mc_led_info), GFP_KERNEL);
6d8d014c CJ	487	if (!mc_led_info) {
	488	ret = -ENOMEM;
	489	goto child_out;
	490	}
242b8117 DM	491
	492	fwnode_for_each_child_node(child, led_node) {
	493	ret = fwnode_property_read_u32(led_node, "color",
	494	&color_id);
	495	if (ret) {
	496	dev_err(priv->dev, "Cannot read color\n");
	497	goto child_out;
	498	}
	499
	500	mc_led_info[num_colors].color_index = color_id;
	501	num_colors++;
	502	}
	503
	504	led->priv = priv;
	505	led->mc_cdev.num_colors = num_colors;
	506	led->mc_cdev.subled_info = mc_led_info;
	507	led_cdev = &led->mc_cdev.led_cdev;
	508	led_cdev->brightness_set_blocking = lp50xx_brightness_set;
	509
242b8117 DM	510	ret = devm_led_classdev_multicolor_register_ext(&priv->client->dev,
	511	&led->mc_cdev,
	512	&init_data);
	513	if (ret) {
	514	dev_err(&priv->client->dev, "led register err: %d\n",
	515	ret);
	516	goto child_out;
	517	}
	518	i++;
	519	fwnode_handle_put(child);
	520	}
	521
	522	return 0;
	523
	524	child_out:
	525	fwnode_handle_put(child);
	526	return ret;
	527	}
	528
	529	static int lp50xx_probe(struct i2c_client *client,
	530	const struct i2c_device_id *id)
	531	{
	532	struct lp50xx *led;
	533	int count;
	534	int ret;
	535
	536	count = device_get_child_node_count(&client->dev);
	537	if (!count) {
	538	dev_err(&client->dev, "LEDs are not defined in device tree!");
	539	return -ENODEV;
	540	}
	541
	542	led = devm_kzalloc(&client->dev, struct_size(led, leds, count),
	543	GFP_KERNEL);
	544	if (!led)
	545	return -ENOMEM;
	546
	547	mutex_init(&led->lock);
	548	led->client = client;
	549	led->dev = &client->dev;
	550	led->chip_info = &lp50xx_chip_info_tbl[id->driver_data];
	551	i2c_set_clientdata(client, led);
	552	led->regmap = devm_regmap_init_i2c(client,
	553	led->chip_info->lp50xx_regmap_config);
	554	if (IS_ERR(led->regmap)) {
	555	ret = PTR_ERR(led->regmap);
	556	dev_err(&client->dev, "Failed to allocate register map: %d\n",
	557	ret);
	558	return ret;
	559	}
	560
	561	ret = lp50xx_reset(led);
	562	if (ret)
	563	return ret;
	564
	565	ret = lp50xx_enable_disable(led, 1);
	566	if (ret)
	567	return ret;
	568
	569	return lp50xx_probe_dt(led);
	570	}
	571
	572	static int lp50xx_remove(struct i2c_client *client)
	573	{
574	struct lp50xx *led = i2c_get_clientdata(client);
575	int ret;
576
577	ret = lp50xx_enable_disable(led, 0);
578	if (ret) {
579	dev_err(&led->client->dev, "Failed to disable chip\n");
580	return ret;
581	}
582
583	if (led->regulator) {
584	ret = regulator_disable(led->regulator);
585	if (ret)
586	dev_err(&led->client->dev,
587	"Failed to disable regulator\n");
588	}
589
590	mutex_destroy(&led->lock);
591
592	return 0;
593	}
594
595	static const struct i2c_device_id lp50xx_id[] = {
596	{ "lp5009", LP5009 },
597	{ "lp5012", LP5012 },
598	{ "lp5018", LP5018 },
599	{ "lp5024", LP5024 },
600	{ "lp5030", LP5030 },
601	{ "lp5036", LP5036 },
602	{ }
603	};
604	MODULE_DEVICE_TABLE(i2c, lp50xx_id);
605
606	static const struct of_device_id of_lp50xx_leds_match[] = {
607	{ .compatible = "ti,lp5009", .data = (void *)LP5009 },
608	{ .compatible = "ti,lp5012", .data = (void *)LP5012 },
609	{ .compatible = "ti,lp5018", .data = (void *)LP5018 },
610	{ .compatible = "ti,lp5024", .data = (void *)LP5024 },
611	{ .compatible = "ti,lp5030", .data = (void *)LP5030 },
612	{ .compatible = "ti,lp5036", .data = (void *)LP5036 },
613	{},
614	};
615	MODULE_DEVICE_TABLE(of, of_lp50xx_leds_match);
616
617	static struct i2c_driver lp50xx_driver = {
618	.driver = {
619	.name = "lp50xx",
620	.of_match_table = of_lp50xx_leds_match,
621	},
622	.probe = lp50xx_probe,
623	.remove = lp50xx_remove,
624	.id_table = lp50xx_id,
625	};
626	module_i2c_driver(lp50xx_driver);
627
628	MODULE_DESCRIPTION("Texas Instruments LP50XX LED driver");
629	MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
630	MODULE_LICENSE("GPL v2");