[linux-2.6-block.git] / drivers / mfd / da9055-i2c.c

 /* I2C access for DA9055 PMICs.
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <dchen@diasemi.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>

#include <linux/mfd/da9055/core.h>

static int da9055_i2c_probe(struct i2c_client *i2c,
				      const struct i2c_device_id *id)
{
	struct da9055 *da9055;
	int ret;

	da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
	if (!da9055)
		return -ENOMEM;

	da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
	if (IS_ERR(da9055->regmap)) {
		ret = PTR_ERR(da9055->regmap);
		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	da9055->dev = &i2c->dev;
	da9055->chip_irq = i2c->irq;

	i2c_set_clientdata(i2c, da9055);

	return da9055_device_init(da9055);
}

static int da9055_i2c_remove(struct i2c_client *i2c)
{
	struct da9055 *da9055 = i2c_get_clientdata(i2c);

	da9055_device_exit(da9055);

	return 0;
}

/*
 * DO NOT change the device Ids. The naming is intentionally specific as both
 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
 * devices (both have configurable I2C addresses, and are to all intents and
 * purposes separate). As a result there are specific DA9055 ids for PMIC
 * and CODEC, which must be different to operate together.
 */
static struct i2c_device_id da9055_i2c_id[] = {
	{"da9055-pmic", 0},
	{ }
};
MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);

static const struct of_device_id da9055_of_match[] = {
	{ .compatible = "dlg,da9055-pmic", },
	{ }
};

static struct i2c_driver da9055_i2c_driver = {
	.probe = da9055_i2c_probe,
	.remove = da9055_i2c_remove,
	.id_table = da9055_i2c_id,
	.driver = {
		.name = "da9055-pmic",
		.of_match_table = of_match_ptr(da9055_of_match),
	},
};

static int __init da9055_i2c_init(void)
{
	int ret;

	ret = i2c_add_driver(&da9055_i2c_driver);
	if (ret != 0) {
		pr_err("DA9055 I2C registration failed %d\n", ret);
		return ret;
	}

	return 0;
}
subsys_initcall(da9055_i2c_init);

static void __exit da9055_i2c_exit(void)
{
	i2c_del_driver(&da9055_i2c_driver);
}
module_exit(da9055_i2c_exit);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
MODULE_LICENSE("GPL");
Commit	Line	Data
2896434c AJ	1	/* I2C access for DA9055 PMICs.
	2	*
	3	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	4	*
	5	* Author: David Dajun Chen <dchen@diasemi.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/device.h>
	16	#include <linux/i2c.h>
	17	#include <linux/err.h>
d9a33515 AT	18	#include <linux/of.h>
d9a33515 AT	19	#include <linux/of_device.h>
2896434c AJ	20
	21	#include <linux/mfd/da9055/core.h>
	22
f791be49	23	static int da9055_i2c_probe(struct i2c_client *i2c,
2896434c AJ	24	const struct i2c_device_id *id)
	25	{
	26	struct da9055 *da9055;
	27	int ret;
	28
	29	da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
	30	if (!da9055)
	31	return -ENOMEM;
	32
	33	da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
	34	if (IS_ERR(da9055->regmap)) {
	35	ret = PTR_ERR(da9055->regmap);
	36	dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
	37	ret);
	38	return ret;
	39	}
	40
	41	da9055->dev = &i2c->dev;
	42	da9055->chip_irq = i2c->irq;
	43
	44	i2c_set_clientdata(i2c, da9055);
	45
	46	return da9055_device_init(da9055);
	47	}
	48
4740f73f	49	static int da9055_i2c_remove(struct i2c_client *i2c)
2896434c AJ	50	{
	51	struct da9055 *da9055 = i2c_get_clientdata(i2c);
	52
	53	da9055_device_exit(da9055);
	54
	55	return 0;
	56	}
	57
07b0e5b1 AT	58	/*
	59	* DO NOT change the device Ids. The naming is intentionally specific as both
	60	* the PMIC and CODEC parts of this chip are instantiated separately as I2C
	61	* devices (both have configurable I2C addresses, and are to all intents and
	62	* purposes separate). As a result there are specific DA9055 ids for PMIC
	63	* and CODEC, which must be different to operate together.
	64	*/
2896434c	65	static struct i2c_device_id da9055_i2c_id[] = {
07b0e5b1	66	{"da9055-pmic", 0},
2896434c AJ	67	{ }
2896434c AJ	68	};
07b0e5b1	69	MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
2896434c	70
d9a33515 AT	71	static const struct of_device_id da9055_of_match[] = {
	72	{ .compatible = "dlg,da9055-pmic", },
	73	{ }
	74	};
	75
2896434c AJ	76	static struct i2c_driver da9055_i2c_driver = {
2896434c AJ	77	.probe = da9055_i2c_probe,
84449216	78	.remove = da9055_i2c_remove,
2896434c AJ	79	.id_table = da9055_i2c_id,
2896434c AJ	80	.driver = {
07b0e5b1	81	.name = "da9055-pmic",
d9a33515	82	.of_match_table = of_match_ptr(da9055_of_match),
2896434c AJ	83	},
	84	};
	85
	86	static int __init da9055_i2c_init(void)
	87	{
	88	int ret;
	89
	90	ret = i2c_add_driver(&da9055_i2c_driver);
	91	if (ret != 0) {
	92	pr_err("DA9055 I2C registration failed %d\n", ret);
	93	return ret;
	94	}
	95
	96	return 0;
	97	}
	98	subsys_initcall(da9055_i2c_init);
	99
	100	static void __exit da9055_i2c_exit(void)
	101	{
	102	i2c_del_driver(&da9055_i2c_driver);
	103	}
	104	module_exit(da9055_i2c_exit);
	105
	106	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	107	MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
	108	MODULE_LICENSE("GPL");