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
23static 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
85static 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
94static 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};
103MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
104
105static 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
116module_i2c_driver(arizona_i2c_driver);
117
118MODULE_DESCRIPTION("Arizona I2C bus interface");
119MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
120MODULE_LICENSE("GPL");
121