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 = NULL;
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	case WM5102:
41		if (IS_ENABLED(CONFIG_MFD_WM5102))
42			regmap_config = &wm5102_i2c_regmap;
43		break;
44	case WM5110:
45	case WM8280:
46		if (IS_ENABLED(CONFIG_MFD_WM5110))
47			regmap_config = &wm5110_i2c_regmap;
48		break;
49	case WM8997:
50		if (IS_ENABLED(CONFIG_MFD_WM8997))
51			regmap_config = &wm8997_i2c_regmap;
52		break;
53	case WM8998:
54	case WM1814:
55		if (IS_ENABLED(CONFIG_MFD_WM8998))
56			regmap_config = &wm8998_i2c_regmap;
57		break;
58	default:
59		dev_err(&i2c->dev, "Unknown device type %ld\n", type);
60		return -EINVAL;
61	}
62
63	if (!regmap_config) {
64		dev_err(&i2c->dev,
65			"No kernel support for device type %ld\n", type);
66		return -EINVAL;
67	}
68
69	arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
70	if (arizona == NULL)
71		return -ENOMEM;
72
73	arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
74	if (IS_ERR(arizona->regmap)) {
75		ret = PTR_ERR(arizona->regmap);
76		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
77			ret);
78		return ret;
79	}
80
81	arizona->type = type;
82	arizona->dev = &i2c->dev;
83	arizona->irq = i2c->irq;
84
85	return arizona_dev_init(arizona);
86}
87
88static int arizona_i2c_remove(struct i2c_client *i2c)
89{
90	struct arizona *arizona = dev_get_drvdata(&i2c->dev);
91	arizona_dev_exit(arizona);
92	return 0;
93}
94
95static const struct i2c_device_id arizona_i2c_id[] = {
96	{ "wm5102", WM5102 },
97	{ "wm5110", WM5110 },
98	{ "wm8280", WM8280 },
99	{ "wm8997", WM8997 },
100	{ "wm8998", WM8998 },
101	{ "wm1814", WM1814 },
102	{ }
103};
104MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
105
106static struct i2c_driver arizona_i2c_driver = {
107	.driver = {
108		.name	= "arizona",
109		.pm	= &arizona_pm_ops,
110		.of_match_table	= of_match_ptr(arizona_of_match),
111	},
112	.probe		= arizona_i2c_probe,
113	.remove		= arizona_i2c_remove,
114	.id_table	= arizona_i2c_id,
115};
116
117module_i2c_driver(arizona_i2c_driver);
118
119MODULE_DESCRIPTION("Arizona I2C bus interface");
120MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
121MODULE_LICENSE("GPL");
122