GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / mfd / wm831x-i2c.c
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/of_device.h>
19 #include <linux/regmap.h>
20
21 #include <linux/mfd/wm831x/core.h>
22 #include <linux/mfd/wm831x/pdata.h>
23
24 static int wm831x_i2c_probe(struct i2c_client *i2c,
25                             const struct i2c_device_id *id)
26 {
27         struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
28         const struct of_device_id *of_id;
29         struct wm831x *wm831x;
30         enum wm831x_parent type;
31         int ret;
32
33         if (i2c->dev.of_node) {
34                 of_id = of_match_device(wm831x_of_match, &i2c->dev);
35                 if (!of_id) {
36                         dev_err(&i2c->dev, "Failed to match device\n");
37                         return -ENODEV;
38                 }
39                 type = (enum wm831x_parent)of_id->data;
40         } else {
41                 type = (enum wm831x_parent)id->driver_data;
42         }
43
44         wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
45         if (wm831x == NULL)
46                 return -ENOMEM;
47
48         i2c_set_clientdata(i2c, wm831x);
49         wm831x->dev = &i2c->dev;
50         wm831x->type = type;
51
52         wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
53         if (IS_ERR(wm831x->regmap)) {
54                 ret = PTR_ERR(wm831x->regmap);
55                 dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
56                         ret);
57                 return ret;
58         }
59
60         if (pdata)
61                 memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
62
63         return wm831x_device_init(wm831x, i2c->irq);
64 }
65
66 static int wm831x_i2c_suspend(struct device *dev)
67 {
68         struct wm831x *wm831x = dev_get_drvdata(dev);
69
70         return wm831x_device_suspend(wm831x);
71 }
72
73 static int wm831x_i2c_poweroff(struct device *dev)
74 {
75         struct wm831x *wm831x = dev_get_drvdata(dev);
76
77         wm831x_device_shutdown(wm831x);
78
79         return 0;
80 }
81
82 static const struct i2c_device_id wm831x_i2c_id[] = {
83         { "wm8310", WM8310 },
84         { "wm8311", WM8311 },
85         { "wm8312", WM8312 },
86         { "wm8320", WM8320 },
87         { "wm8321", WM8321 },
88         { "wm8325", WM8325 },
89         { "wm8326", WM8326 },
90         { }
91 };
92
93 static const struct dev_pm_ops wm831x_pm_ops = {
94         .suspend = wm831x_i2c_suspend,
95         .poweroff = wm831x_i2c_poweroff,
96 };
97
98 static struct i2c_driver wm831x_i2c_driver = {
99         .driver = {
100                 .name = "wm831x",
101                 .pm = &wm831x_pm_ops,
102                 .of_match_table = of_match_ptr(wm831x_of_match),
103                 .suppress_bind_attrs = true,
104         },
105         .probe = wm831x_i2c_probe,
106         .id_table = wm831x_i2c_id,
107 };
108
109 static int __init wm831x_i2c_init(void)
110 {
111         int ret;
112
113         ret = i2c_add_driver(&wm831x_i2c_driver);
114         if (ret != 0)
115                 pr_err("Failed to register wm831x I2C driver: %d\n", ret);
116
117         return ret;
118 }
119 subsys_initcall(wm831x_i2c_init);