1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * wm831x-i2c.c  --  I2C access for Wolfson WM831x PMICs
4 *
5 * Copyright 2009,2010 Wolfson Microelectronics PLC.
6 *
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 */
9
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/i2c.h>
13#include <linux/delay.h>
14#include <linux/mfd/core.h>
15#include <linux/slab.h>
16#include <linux/err.h>
17#include <linux/of.h>
18#include <linux/regmap.h>
19
20#include <linux/mfd/wm831x/core.h>
21#include <linux/mfd/wm831x/pdata.h>
22
23static int wm831x_i2c_probe(struct i2c_client *i2c)
24{
25	struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
26	struct wm831x *wm831x;
27	enum wm831x_parent type;
28	int ret;
29
30	type = (uintptr_t)i2c_get_match_data(i2c);
31	if (!type) {
32		dev_err(&i2c->dev, "Failed to match device\n");
33		return -ENODEV;
34	}
35
36	wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
37	if (wm831x == NULL)
38		return -ENOMEM;
39
40	i2c_set_clientdata(i2c, wm831x);
41	wm831x->dev = &i2c->dev;
42	wm831x->type = type;
43
44	wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
45	if (IS_ERR(wm831x->regmap)) {
46		ret = PTR_ERR(wm831x->regmap);
47		dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
48			ret);
49		return ret;
50	}
51
52	if (pdata)
53		memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
54
55	return wm831x_device_init(wm831x, i2c->irq);
56}
57
58static int wm831x_i2c_suspend(struct device *dev)
59{
60	struct wm831x *wm831x = dev_get_drvdata(dev);
61
62	return wm831x_device_suspend(wm831x);
63}
64
65static int wm831x_i2c_poweroff(struct device *dev)
66{
67	struct wm831x *wm831x = dev_get_drvdata(dev);
68
69	wm831x_device_shutdown(wm831x);
70
71	return 0;
72}
73
74static const struct i2c_device_id wm831x_i2c_id[] = {
75	{ "wm8310", WM8310 },
76	{ "wm8311", WM8311 },
77	{ "wm8312", WM8312 },
78	{ "wm8320", WM8320 },
79	{ "wm8321", WM8321 },
80	{ "wm8325", WM8325 },
81	{ "wm8326", WM8326 },
82	{ }
83};
84
85static const struct dev_pm_ops wm831x_pm_ops = {
86	.suspend = wm831x_i2c_suspend,
87	.poweroff = wm831x_i2c_poweroff,
88};
89
90static struct i2c_driver wm831x_i2c_driver = {
91	.driver = {
92		.name = "wm831x",
93		.pm = &wm831x_pm_ops,
94		.of_match_table = of_match_ptr(wm831x_of_match),
95		.suppress_bind_attrs = true,
96	},
97	.probe = wm831x_i2c_probe,
98	.id_table = wm831x_i2c_id,
99};
100
101static int __init wm831x_i2c_init(void)
102{
103	int ret;
104
105	ret = i2c_add_driver(&wm831x_i2c_driver);
106	if (ret != 0)
107		pr_err("Failed to register wm831x I2C driver: %d\n", ret);
108
109	return ret;
110}
111subsys_initcall(wm831x_i2c_init);
112