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)23 static int arizona_i2c_probe(struct i2c_client *i2c)
24 {
25 const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
26 const void *match_data;
27 struct arizona *arizona;
28 const struct regmap_config *regmap_config = NULL;
29 unsigned long type = 0;
30 int ret;
31
32 match_data = device_get_match_data(&i2c->dev);
33 if (match_data)
34 type = (unsigned long)match_data;
35 else if (id)
36 type = id->driver_data;
37
38 switch (type) {
39 case WM5102:
40 if (IS_ENABLED(CONFIG_MFD_WM5102))
41 regmap_config = &wm5102_i2c_regmap;
42 break;
43 case WM5110:
44 case WM8280:
45 if (IS_ENABLED(CONFIG_MFD_WM5110))
46 regmap_config = &wm5110_i2c_regmap;
47 break;
48 case WM8997:
49 if (IS_ENABLED(CONFIG_MFD_WM8997))
50 regmap_config = &wm8997_i2c_regmap;
51 break;
52 case WM8998:
53 case WM1814:
54 if (IS_ENABLED(CONFIG_MFD_WM8998))
55 regmap_config = &wm8998_i2c_regmap;
56 break;
57 default:
58 dev_err(&i2c->dev, "Unknown device type %ld\n", type);
59 return -EINVAL;
60 }
61
62 if (!regmap_config) {
63 dev_err(&i2c->dev,
64 "No kernel support for device type %ld\n", type);
65 return -EINVAL;
66 }
67
68 arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
69 if (arizona == NULL)
70 return -ENOMEM;
71
72 arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
73 if (IS_ERR(arizona->regmap)) {
74 ret = PTR_ERR(arizona->regmap);
75 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
76 ret);
77 return ret;
78 }
79
80 arizona->type = type;
81 arizona->dev = &i2c->dev;
82 arizona->irq = i2c->irq;
83
84 return arizona_dev_init(arizona);
85 }
86
arizona_i2c_remove(struct i2c_client * i2c)87 static void arizona_i2c_remove(struct i2c_client *i2c)
88 {
89 struct arizona *arizona = dev_get_drvdata(&i2c->dev);
90
91 arizona_dev_exit(arizona);
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 #ifdef CONFIG_OF
106 static const struct of_device_id arizona_i2c_of_match[] = {
107 { .compatible = "wlf,wm5102", .data = (void *)WM5102 },
108 { .compatible = "wlf,wm5110", .data = (void *)WM5110 },
109 { .compatible = "wlf,wm8280", .data = (void *)WM8280 },
110 { .compatible = "wlf,wm8997", .data = (void *)WM8997 },
111 { .compatible = "wlf,wm8998", .data = (void *)WM8998 },
112 { .compatible = "wlf,wm1814", .data = (void *)WM1814 },
113 {},
114 };
115 #endif
116
117 static struct i2c_driver arizona_i2c_driver = {
118 .driver = {
119 .name = "arizona",
120 .pm = pm_ptr(&arizona_pm_ops),
121 .of_match_table = of_match_ptr(arizona_i2c_of_match),
122 },
123 .probe_new = arizona_i2c_probe,
124 .remove = arizona_i2c_remove,
125 .id_table = arizona_i2c_id,
126 };
127
128 module_i2c_driver(arizona_i2c_driver);
129
130 MODULE_SOFTDEP("pre: arizona_ldo1");
131 MODULE_DESCRIPTION("Arizona I2C bus interface");
132 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
133 MODULE_LICENSE("GPL");
134