1/*
2 * Arizona-i2c.c  --  Arizona I2C bus interface
3 *
4 * Copyright 2012 Wolfson Microelectronics plc
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/module.h>
16#include <linux/pm_runtime.h>
17#include <linux/regmap.h>
18#include <linux/regulator/consumer.h>
19#include <linux/slab.h>
20#include <linux/of.h>
21
22#include <linux/mfd/arizona/core.h>
23
24#include "arizona.h"
25
26static int arizona_i2c_probe(struct i2c_client *i2c,
27			     const struct i2c_device_id *id)
28{
29	struct arizona *arizona;
30	const struct regmap_config *regmap_config;
31	unsigned long type;
32	int ret;
33
34	if (i2c->dev.of_node)
35		type = arizona_of_get_type(&i2c->dev);
36	else
37		type = id->driver_data;
38
39	switch (type) {
40#ifdef CONFIG_MFD_WM5102
41	case WM5102:
42		regmap_config = &wm5102_i2c_regmap;
43		break;
44#endif
45#ifdef CONFIG_MFD_WM5110
46	case WM5110:
47	case WM8280:
48		regmap_config = &wm5110_i2c_regmap;
49		break;
50#endif
51#ifdef CONFIG_MFD_WM8997
52	case WM8997:
53		regmap_config = &wm8997_i2c_regmap;
54		break;
55#endif
56	default:
57		dev_err(&i2c->dev, "Unknown device type %ld\n",
58			id->driver_data);
59		return -EINVAL;
60	}
61
62	arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
63	if (arizona == NULL)
64		return -ENOMEM;
65
66	arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
67	if (IS_ERR(arizona->regmap)) {
68		ret = PTR_ERR(arizona->regmap);
69		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
70			ret);
71		return ret;
72	}
73
74	arizona->type = id->driver_data;
75	arizona->dev = &i2c->dev;
76	arizona->irq = i2c->irq;
77
78	return arizona_dev_init(arizona);
79}
80
81static int arizona_i2c_remove(struct i2c_client *i2c)
82{
83	struct arizona *arizona = dev_get_drvdata(&i2c->dev);
84	arizona_dev_exit(arizona);
85	return 0;
86}
87
88static const struct i2c_device_id arizona_i2c_id[] = {
89	{ "wm5102", WM5102 },
90	{ "wm5110", WM5110 },
91	{ "wm8280", WM8280 },
92	{ "wm8997", WM8997 },
93	{ }
94};
95MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
96
97static struct i2c_driver arizona_i2c_driver = {
98	.driver = {
99		.name	= "arizona",
100		.owner	= THIS_MODULE,
101		.pm	= &arizona_pm_ops,
102		.of_match_table	= of_match_ptr(arizona_of_match),
103	},
104	.probe		= arizona_i2c_probe,
105	.remove		= arizona_i2c_remove,
106	.id_table	= arizona_i2c_id,
107};
108
109module_i2c_driver(arizona_i2c_driver);
110
111MODULE_DESCRIPTION("Arizona I2C bus interface");
112MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
113MODULE_LICENSE("GPL");
114