1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Arizona-i2c.c -- Arizona I2C bus interface
4 *
5 * Copyright 2012 Wolfson Microelectronics plc
6 *
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 */
9
10 #include <linux/err.h>
11 #include <linux/i2c.h>
12 #include <linux/module.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/regmap.h>
15 #include <linux/regulator/consumer.h>
16 #include <linux/slab.h>
17 #include <linux/of.h>
18
19 #include <linux/mfd/arizona/core.h>
20
21 #include "arizona.h"
22
arizona_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)23 static int arizona_i2c_probe(struct i2c_client *i2c,
24 const struct i2c_device_id *id)
25 {
26 struct arizona *arizona;
27 const struct regmap_config *regmap_config = NULL;
28 unsigned long type;
29 int ret;
30
31 if (i2c->dev.of_node)
32 type = arizona_of_get_type(&i2c->dev);
33 else
34 type = id->driver_data;
35
36 switch (type) {
37 case WM5102:
38 if (IS_ENABLED(CONFIG_MFD_WM5102))
39 regmap_config = &wm5102_i2c_regmap;
40 break;
41 case WM5110:
42 case WM8280:
43 if (IS_ENABLED(CONFIG_MFD_WM5110))
44 regmap_config = &wm5110_i2c_regmap;
45 break;
46 case WM8997:
47 if (IS_ENABLED(CONFIG_MFD_WM8997))
48 regmap_config = &wm8997_i2c_regmap;
49 break;
50 case WM8998:
51 case WM1814:
52 if (IS_ENABLED(CONFIG_MFD_WM8998))
53 regmap_config = &wm8998_i2c_regmap;
54 break;
55 default:
56 dev_err(&i2c->dev, "Unknown device type %ld\n", type);
57 return -EINVAL;
58 }
59
60 if (!regmap_config) {
61 dev_err(&i2c->dev,
62 "No kernel support for device type %ld\n", type);
63 return -EINVAL;
64 }
65
66 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
67 if (arizona == NULL)
68 return -ENOMEM;
69
70 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
71 if (IS_ERR(arizona->regmap)) {
72 ret = PTR_ERR(arizona->regmap);
73 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
74 ret);
75 return ret;
76 }
77
78 arizona->type = type;
79 arizona->dev = &i2c->dev;
80 arizona->irq = i2c->irq;
81
82 return arizona_dev_init(arizona);
83 }
84
arizona_i2c_remove(struct i2c_client * i2c)85 static int arizona_i2c_remove(struct i2c_client *i2c)
86 {
87 struct arizona *arizona = dev_get_drvdata(&i2c->dev);
88
89 arizona_dev_exit(arizona);
90
91 return 0;
92 }
93
94 static const struct i2c_device_id arizona_i2c_id[] = {
95 { "wm5102", WM5102 },
96 { "wm5110", WM5110 },
97 { "wm8280", WM8280 },
98 { "wm8997", WM8997 },
99 { "wm8998", WM8998 },
100 { "wm1814", WM1814 },
101 { }
102 };
103 MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
104
105 static struct i2c_driver arizona_i2c_driver = {
106 .driver = {
107 .name = "arizona",
108 .pm = &arizona_pm_ops,
109 .of_match_table = of_match_ptr(arizona_of_match),
110 },
111 .probe = arizona_i2c_probe,
112 .remove = arizona_i2c_remove,
113 .id_table = arizona_i2c_id,
114 };
115
116 module_i2c_driver(arizona_i2c_driver);
117
118 MODULE_DESCRIPTION("Arizona I2C bus interface");
119 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
120 MODULE_LICENSE("GPL");
121