[linux.git] / drivers / mfd / mp2629.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * MP2629 parent driver for ADC and battery charger
 *
 * Copyright 2020 Monolithic Power Systems, Inc
 *
 * Author: Saravanan Sekar <[email protected]>
 */

#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mp2629.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>

static const struct mfd_cell mp2629_cell[] = {
	{
		.name = "mp2629_adc",
		.of_compatible = "mps,mp2629_adc",
	},
	{
		.name = "mp2629_charger",
		.of_compatible = "mps,mp2629_charger",
	}
};

static const struct regmap_config mp2629_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = 0x17,
};

static int mp2629_probe(struct i2c_client *client)
{
	struct mp2629_data *ddata;
	int ret;

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

	ddata->dev = &client->dev;
	i2c_set_clientdata(client, ddata);

	ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config);
	if (IS_ERR(ddata->regmap)) {
		dev_err(ddata->dev, "Failed to allocate regmap\n");
		return PTR_ERR(ddata->regmap);
	}

	ret = devm_mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, mp2629_cell,
				   ARRAY_SIZE(mp2629_cell), NULL, 0, NULL);
	if (ret)
		dev_err(ddata->dev, "Failed to register sub-devices %d\n", ret);

	return ret;
}

static const struct of_device_id mp2629_of_match[] = {
	{ .compatible = "mps,mp2629"},
	{ }
};
MODULE_DEVICE_TABLE(of, mp2629_of_match);

static struct i2c_driver mp2629_driver = {
	.driver = {
		.name = "mp2629",
		.of_match_table = mp2629_of_match,
	},
	.probe		= mp2629_probe,
};
module_i2c_driver(mp2629_driver);

MODULE_AUTHOR("Saravanan Sekar <[email protected]>");
MODULE_DESCRIPTION("MP2629 Battery charger parent driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
06081646 SS	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* MP2629 parent driver for ADC and battery charger
	4	*
	5	* Copyright 2020 Monolithic Power Systems, Inc
	6	*
	7	* Author: Saravanan Sekar <[email protected]>
	8	*/
	9
	10	#include <linux/i2c.h>
	11	#include <linux/kernel.h>
	12	#include <linux/mfd/core.h>
	13	#include <linux/mfd/mp2629.h>
	14	#include <linux/module.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/regmap.h>
	17	#include <linux/slab.h>
	18
	19	static const struct mfd_cell mp2629_cell[] = {
	20	{
	21	.name = "mp2629_adc",
	22	.of_compatible = "mps,mp2629_adc",
	23	},
	24	{
	25	.name = "mp2629_charger",
	26	.of_compatible = "mps,mp2629_charger",
	27	}
	28	};
	29
	30	static const struct regmap_config mp2629_regmap_config = {
	31	.reg_bits = 8,
	32	.val_bits = 8,
	33	.max_register = 0x17,
	34	};
	35
	36	static int mp2629_probe(struct i2c_client *client)
	37	{
	38	struct mp2629_data *ddata;
	39	int ret;
	40
	41	ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
	42	if (!ddata)
	43	return -ENOMEM;
	44
	45	ddata->dev = &client->dev;
	46	i2c_set_clientdata(client, ddata);
	47
	48	ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config);
	49	if (IS_ERR(ddata->regmap)) {
	50	dev_err(ddata->dev, "Failed to allocate regmap\n");
	51	return PTR_ERR(ddata->regmap);
	52	}
	53
	54	ret = devm_mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, mp2629_cell,
	55	ARRAY_SIZE(mp2629_cell), NULL, 0, NULL);
	56	if (ret)
	57	dev_err(ddata->dev, "Failed to register sub-devices %d\n", ret);
	58
	59	return ret;
	60	}
	61
	62	static const struct of_device_id mp2629_of_match[] = {
	63	{ .compatible = "mps,mp2629"},
	64	{ }
65	};
66	MODULE_DEVICE_TABLE(of, mp2629_of_match);
67
68	static struct i2c_driver mp2629_driver = {
69	.driver = {
70	.name = "mp2629",
71	.of_match_table = mp2629_of_match,
72	},
9816d859	73	.probe = mp2629_probe,
06081646 SS	74	};
	75	module_i2c_driver(mp2629_driver);
	76
	77	MODULE_AUTHOR("Saravanan Sekar <[email protected]>");
	78	MODULE_DESCRIPTION("MP2629 Battery charger parent driver");
	79	MODULE_LICENSE("GPL");