xref: /openbmc/linux/drivers/mfd/arizona-i2c.c (revision ecd25094)
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 
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 
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