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
92 arizona_dev_exit(arizona);
93
94 return 0;
95}
96
97static const struct i2c_device_id arizona_i2c_id[] = {
98 { "wm5102", WM5102 },
99 { "wm5110", WM5110 },
100 { "wm8280", WM8280 },
101 { "wm8997", WM8997 },
102 { "wm8998", WM8998 },
103 { "wm1814", WM1814 },
104 { }
105};
106MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
107
108static struct i2c_driver arizona_i2c_driver = {
109 .driver = {
110 .name = "arizona",
111 .pm = &arizona_pm_ops,
112 .of_match_table = of_match_ptr(arizona_of_match),
113 },
114 .probe = arizona_i2c_probe,
115 .remove = arizona_i2c_remove,
116 .id_table = arizona_i2c_id,
117};
118
119module_i2c_driver(arizona_i2c_driver);
120
121MODULE_DESCRIPTION("Arizona I2C bus interface");
122MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
123MODULE_LICENSE("GPL");
124