[linux-block.git] / drivers / mfd / tps6105x.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Core driver for TPS61050/61052 boost converters, used for while LED
 * driving, audio power amplification, white LED flash, and generic
 * boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)
 * and a flash synchronization pin to synchronize flash events when used as
 * flashgun.
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/gpio.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6105x.h>

static struct regmap_config tps6105x_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TPS6105X_REG_3,
};

static int tps6105x_startup(struct tps6105x *tps6105x)
{
	int ret;
	unsigned int regval;

	ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, &regval);
	if (ret)
		return ret;
	switch (regval >> TPS6105X_REG0_MODE_SHIFT) {
	case TPS6105X_REG0_MODE_SHUTDOWN:
		dev_info(&tps6105x->client->dev,
			 "TPS6105x found in SHUTDOWN mode\n");
		break;
	case TPS6105X_REG0_MODE_TORCH:
		dev_info(&tps6105x->client->dev,
			 "TPS6105x found in TORCH mode\n");
		break;
	case TPS6105X_REG0_MODE_TORCH_FLASH:
		dev_info(&tps6105x->client->dev,
			 "TPS6105x found in FLASH mode\n");
		break;
	case TPS6105X_REG0_MODE_VOLTAGE:
		dev_info(&tps6105x->client->dev,
			 "TPS6105x found in VOLTAGE mode\n");
		break;
	default:
		break;
	}

	return ret;
}

/*
 * MFD cells - we always have a GPIO cell and we have one cell
 * which is selected operation mode.
 */
static struct mfd_cell tps6105x_gpio_cell = {
	.name = "tps6105x-gpio",
};

static struct mfd_cell tps6105x_leds_cell = {
	.name = "tps6105x-leds",
};

static struct mfd_cell tps6105x_flash_cell = {
	.name = "tps6105x-flash",
};

static struct mfd_cell tps6105x_regulator_cell = {
	.name = "tps6105x-regulator",
};

static int tps6105x_add_device(struct tps6105x *tps6105x,
			       struct mfd_cell *cell)
{
	cell->platform_data = tps6105x;
	cell->pdata_size = sizeof(*tps6105x);

	return mfd_add_devices(&tps6105x->client->dev,
			       PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL);
}

static struct tps6105x_platform_data *tps6105x_parse_dt(struct device *dev)
{
	struct device_node *np = dev->of_node;
	struct tps6105x_platform_data *pdata;
	struct device_node *child;

	if (!np)
		return ERR_PTR(-EINVAL);
	if (of_get_available_child_count(np) > 1) {
		dev_err(dev, "cannot support multiple operational modes");
		return ERR_PTR(-EINVAL);
	}
	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return ERR_PTR(-ENOMEM);
	pdata->mode = TPS6105X_MODE_SHUTDOWN;
	for_each_available_child_of_node(np, child) {
		if (child->name && !of_node_cmp(child->name, "regulator"))
			pdata->mode = TPS6105X_MODE_VOLTAGE;
		else if (child->name && !of_node_cmp(child->name, "led"))
			pdata->mode = TPS6105X_MODE_TORCH;
	}

	return pdata;
}

static int tps6105x_probe(struct i2c_client *client)
{
	struct tps6105x			*tps6105x;
	struct tps6105x_platform_data	*pdata;
	int ret;

	pdata = dev_get_platdata(&client->dev);
	if (!pdata)
		pdata = tps6105x_parse_dt(&client->dev);
	if (IS_ERR(pdata)) {
		dev_err(&client->dev, "No platform data or DT found");
		return PTR_ERR(pdata);
	}

	tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL);
	if (!tps6105x)
		return -ENOMEM;

	tps6105x->regmap = devm_regmap_init_i2c(client, &tps6105x_regmap_config);
	if (IS_ERR(tps6105x->regmap))
		return PTR_ERR(tps6105x->regmap);

	i2c_set_clientdata(client, tps6105x);
	tps6105x->client = client;
	tps6105x->pdata = pdata;

	ret = tps6105x_startup(tps6105x);
	if (ret) {
		dev_err(&client->dev, "chip initialization failed\n");
		return ret;
	}

	ret = tps6105x_add_device(tps6105x, &tps6105x_gpio_cell);
	if (ret)
		return ret;

	switch (pdata->mode) {
	case TPS6105X_MODE_SHUTDOWN:
		dev_info(&client->dev,
			 "present, not used for anything, only GPIO\n");
		break;
	case TPS6105X_MODE_TORCH:
		ret = tps6105x_add_device(tps6105x, &tps6105x_leds_cell);
		break;
	case TPS6105X_MODE_TORCH_FLASH:
		ret = tps6105x_add_device(tps6105x, &tps6105x_flash_cell);
		break;
	case TPS6105X_MODE_VOLTAGE:
		ret = tps6105x_add_device(tps6105x, &tps6105x_regulator_cell);
		break;
	default:
		dev_warn(&client->dev, "invalid mode: %d\n", pdata->mode);
		break;
	}

	if (ret)
		mfd_remove_devices(&client->dev);

	return ret;
}

static void tps6105x_remove(struct i2c_client *client)
{
	struct tps6105x *tps6105x = i2c_get_clientdata(client);

	mfd_remove_devices(&client->dev);

	/* Put chip in shutdown mode */
	regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
		TPS6105X_REG0_MODE_MASK,
		TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
}

static const struct i2c_device_id tps6105x_id[] = {
	{ "tps61050", 0 },
	{ "tps61052", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tps6105x_id);

static const struct of_device_id tps6105x_of_match[] = {
	{ .compatible = "ti,tps61050" },
	{ .compatible = "ti,tps61052" },
	{ },
};
MODULE_DEVICE_TABLE(of, tps6105x_of_match);

static struct i2c_driver tps6105x_driver = {
	.driver = {
		.name	= "tps6105x",
		.of_match_table = tps6105x_of_match,
	},
	.probe		= tps6105x_probe,
	.remove		= tps6105x_remove,
	.id_table	= tps6105x_id,
};

static int __init tps6105x_init(void)
{
	return i2c_add_driver(&tps6105x_driver);
}
subsys_initcall(tps6105x_init);

static void __exit tps6105x_exit(void)
{
	i2c_del_driver(&tps6105x_driver);
}
module_exit(tps6105x_exit);

MODULE_AUTHOR("Linus Walleij");
MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
af873fce	1	// SPDX-License-Identifier: GPL-2.0-only
798a8eee LW	2	/*
	3	* Core driver for TPS61050/61052 boost converters, used for while LED
	4	* driving, audio power amplification, white LED flash, and generic
	5	* boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)
	6	* and a flash synchronization pin to synchronize flash events when used as
	7	* flashgun.
	8	*
	9	* Copyright (C) 2011 ST-Ericsson SA
	10	* Written on behalf of Linaro for ST-Ericsson
	11	*
	12	* Author: Linus Walleij <linus.walleij@linaro.org>
798a8eee LW	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/i2c.h>
7e507119	18	#include <linux/regmap.h>
798a8eee LW	19	#include <linux/gpio.h>
	20	#include <linux/spinlock.h>
	21	#include <linux/slab.h>
	22	#include <linux/err.h>
798a8eee LW	23	#include <linux/mfd/core.h>
	24	#include <linux/mfd/tps6105x.h>
	25
7e507119 GD	26	static struct regmap_config tps6105x_regmap_config = {
	27	.reg_bits = 8,
	28	.val_bits = 8,
	29	.max_register = TPS6105X_REG_3,
	30	};
798a8eee	31
f791be49	32	static int tps6105x_startup(struct tps6105x *tps6105x)
798a8eee LW	33	{
798a8eee LW	34	int ret;
7e507119	35	unsigned int regval;
798a8eee	36
7e507119	37	ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, &regval);
798a8eee LW	38	if (ret)
	39	return ret;
	40	switch (regval >> TPS6105X_REG0_MODE_SHIFT) {
	41	case TPS6105X_REG0_MODE_SHUTDOWN:
	42	dev_info(&tps6105x->client->dev,
	43	"TPS6105x found in SHUTDOWN mode\n");
	44	break;
	45	case TPS6105X_REG0_MODE_TORCH:
	46	dev_info(&tps6105x->client->dev,
	47	"TPS6105x found in TORCH mode\n");
	48	break;
	49	case TPS6105X_REG0_MODE_TORCH_FLASH:
	50	dev_info(&tps6105x->client->dev,
	51	"TPS6105x found in FLASH mode\n");
	52	break;
	53	case TPS6105X_REG0_MODE_VOLTAGE:
	54	dev_info(&tps6105x->client->dev,
	55	"TPS6105x found in VOLTAGE mode\n");
	56	break;
	57	default:
	58	break;
	59	}
	60
	61	return ret;
	62	}
	63
	64	/*
ea50e9d3 GD	65	* MFD cells - we always have a GPIO cell and we have one cell
ea50e9d3 GD	66	* which is selected operation mode.
798a8eee	67	*/
ea50e9d3 GD	68	static struct mfd_cell tps6105x_gpio_cell = {
	69	.name = "tps6105x-gpio",
	70	};
	71
	72	static struct mfd_cell tps6105x_leds_cell = {
	73	.name = "tps6105x-leds",
	74	};
	75
	76	static struct mfd_cell tps6105x_flash_cell = {
	77	.name = "tps6105x-flash",
798a8eee LW	78	};
798a8eee LW	79
ea50e9d3 GD	80	static struct mfd_cell tps6105x_regulator_cell = {
	81	.name = "tps6105x-regulator",
	82	};
	83
	84	static int tps6105x_add_device(struct tps6105x *tps6105x,
	85	struct mfd_cell *cell)
	86	{
	87	cell->platform_data = tps6105x;
	88	cell->pdata_size = sizeof(*tps6105x);
	89
	90	return mfd_add_devices(&tps6105x->client->dev,
	91	PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL);
	92	}
	93
62f7f3ec SVA	94	static struct tps6105x_platform_data tps6105x_parse_dt(struct device dev)
	95	{
	96	struct device_node *np = dev->of_node;
	97	struct tps6105x_platform_data *pdata;
	98	struct device_node *child;
	99
	100	if (!np)
	101	return ERR_PTR(-EINVAL);
	102	if (of_get_available_child_count(np) > 1) {
	103	dev_err(dev, "cannot support multiple operational modes");
	104	return ERR_PTR(-EINVAL);
	105	}
	106	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	107	if (!pdata)
	108	return ERR_PTR(-ENOMEM);
	109	pdata->mode = TPS6105X_MODE_SHUTDOWN;
	110	for_each_available_child_of_node(np, child) {
	111	if (child->name && !of_node_cmp(child->name, "regulator"))
	112	pdata->mode = TPS6105X_MODE_VOLTAGE;
	113	else if (child->name && !of_node_cmp(child->name, "led"))
	114	pdata->mode = TPS6105X_MODE_TORCH;
	115	}
	116
	117	return pdata;
	118	}
	119
bb5b1c64	120	static int tps6105x_probe(struct i2c_client *client)
798a8eee LW	121	{
	122	struct tps6105x *tps6105x;
	123	struct tps6105x_platform_data *pdata;
	124	int ret;
ea50e9d3 GD	125
ea50e9d3 GD	126	pdata = dev_get_platdata(&client->dev);
62f7f3ec SVA	127	if (!pdata)
	128	pdata = tps6105x_parse_dt(&client->dev);
	129	if (IS_ERR(pdata)) {
	130	dev_err(&client->dev, "No platform data or DT found");
	131	return PTR_ERR(pdata);
ea50e9d3	132	}
798a8eee	133
ad83533a	134	tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL);
798a8eee LW	135	if (!tps6105x)
	136	return -ENOMEM;
	137
7e507119 GD	138	tps6105x->regmap = devm_regmap_init_i2c(client, &tps6105x_regmap_config);
	139	if (IS_ERR(tps6105x->regmap))
	140	return PTR_ERR(tps6105x->regmap);
	141
798a8eee LW	142	i2c_set_clientdata(client, tps6105x);
798a8eee LW	143	tps6105x->client = client;
798a8eee	144	tps6105x->pdata = pdata;
798a8eee LW	145
	146	ret = tps6105x_startup(tps6105x);
	147	if (ret) {
	148	dev_err(&client->dev, "chip initialization failed\n");
ad83533a	149	return ret;
798a8eee LW	150	}
798a8eee LW	151
ea50e9d3 GD	152	ret = tps6105x_add_device(tps6105x, &tps6105x_gpio_cell);
	153	if (ret)
	154	return ret;
	155
798a8eee LW	156	switch (pdata->mode) {
	157	case TPS6105X_MODE_SHUTDOWN:
	158	dev_info(&client->dev,
	159	"present, not used for anything, only GPIO\n");
	160	break;
	161	case TPS6105X_MODE_TORCH:
ea50e9d3	162	ret = tps6105x_add_device(tps6105x, &tps6105x_leds_cell);
798a8eee LW	163	break;
798a8eee LW	164	case TPS6105X_MODE_TORCH_FLASH:
ea50e9d3	165	ret = tps6105x_add_device(tps6105x, &tps6105x_flash_cell);
798a8eee LW	166	break;
798a8eee LW	167	case TPS6105X_MODE_VOLTAGE:
ea50e9d3	168	ret = tps6105x_add_device(tps6105x, &tps6105x_regulator_cell);
798a8eee LW	169	break;
798a8eee LW	170	default:
ea50e9d3	171	dev_warn(&client->dev, "invalid mode: %d\n", pdata->mode);
798a8eee LW	172	break;
	173	}
	174
ea50e9d3 GD	175	if (ret)
ea50e9d3 GD	176	mfd_remove_devices(&client->dev);
798a8eee	177
ea50e9d3	178	return ret;
798a8eee LW	179	}
798a8eee LW	180
ed5c2f5f	181	static void tps6105x_remove(struct i2c_client *client)
798a8eee LW	182	{
	183	struct tps6105x *tps6105x = i2c_get_clientdata(client);
	184
	185	mfd_remove_devices(&client->dev);
	186
	187	/* Put chip in shutdown mode */
7e507119	188	regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
798a8eee LW	189	TPS6105X_REG0_MODE_MASK,
798a8eee LW	190	TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
798a8eee LW	191	}
	192
	193	static const struct i2c_device_id tps6105x_id[] = {
	194	{ "tps61050", 0 },
	195	{ "tps61052", 0 },
	196	{ }
	197	};
	198	MODULE_DEVICE_TABLE(i2c, tps6105x_id);
	199
125b249e JMC	200	static const struct of_device_id tps6105x_of_match[] = {
	201	{ .compatible = "ti,tps61050" },
	202	{ .compatible = "ti,tps61052" },
	203	{ },
	204	};
	205	MODULE_DEVICE_TABLE(of, tps6105x_of_match);
	206
798a8eee LW	207	static struct i2c_driver tps6105x_driver = {
	208	.driver = {
	209	.name = "tps6105x",
125b249e	210	.of_match_table = tps6105x_of_match,
798a8eee	211	},
9816d859	212	.probe = tps6105x_probe,
84449216	213	.remove = tps6105x_remove,
798a8eee LW	214	.id_table = tps6105x_id,
	215	};
	216
	217	static int __init tps6105x_init(void)
	218	{
	219	return i2c_add_driver(&tps6105x_driver);
	220	}
	221	subsys_initcall(tps6105x_init);
	222
	223	static void __exit tps6105x_exit(void)
	224	{
	225	i2c_del_driver(&tps6105x_driver);
	226	}
	227	module_exit(tps6105x_exit);
	228
	229	MODULE_AUTHOR("Linus Walleij");
	230	MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
	231	MODULE_LICENSE("GPL v2");