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>
 18#include <linux/of.h>
 19#include <linux/of_device.h>
 20
 21#include <linux/mfd/da9055/core.h>
 22
 23static int da9055_i2c_probe(struct i2c_client *i2c,
 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
 49static int da9055_i2c_remove(struct i2c_client *i2c)
 50{
 51	struct da9055 *da9055 = i2c_get_clientdata(i2c);
 52
 53	da9055_device_exit(da9055);
 54
 55	return 0;
 56}
 57
 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 */
 65static struct i2c_device_id da9055_i2c_id[] = {
 66	{"da9055-pmic", 0},
 67	{ }
 68};
 69MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
 70
 71static const struct of_device_id da9055_of_match[] = {
 72	{ .compatible = "dlg,da9055-pmic", },
 73	{ }
 74};
 75
 76static struct i2c_driver da9055_i2c_driver = {
 77	.probe = da9055_i2c_probe,
 78	.remove = da9055_i2c_remove,
 79	.id_table = da9055_i2c_id,
 80	.driver = {
 81		.name = "da9055-pmic",
 82		.owner = THIS_MODULE,
 83		.of_match_table = of_match_ptr(da9055_of_match),
 84	},
 85};
 86
 87static int __init da9055_i2c_init(void)
 88{
 89	int ret;
 90
 91	ret = i2c_add_driver(&da9055_i2c_driver);
 92	if (ret != 0) {
 93		pr_err("DA9055 I2C registration failed %d\n", ret);
 94		return ret;
 95	}
 96
 97	return 0;
 98}
 99subsys_initcall(da9055_i2c_init);
100
101static void __exit da9055_i2c_exit(void)
102{
103	i2c_del_driver(&da9055_i2c_driver);
104}
105module_exit(da9055_i2c_exit);
106
107MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
108MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
109MODULE_LICENSE("GPL");