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 | |
23 | static int wm831x_i2c_probe(struct i2c_client *i2c) |
24 | { |
25 | struct wm831x_pdata *pdata = dev_get_platdata(dev: &i2c->dev); |
26 | struct wm831x *wm831x; |
27 | enum wm831x_parent type; |
28 | int ret; |
29 | |
30 | type = (uintptr_t)i2c_get_match_data(client: i2c); |
31 | if (!type) { |
32 | dev_err(&i2c->dev, "Failed to match device\n" ); |
33 | return -ENODEV; |
34 | } |
35 | |
36 | wm831x = devm_kzalloc(dev: &i2c->dev, size: sizeof(struct wm831x), GFP_KERNEL); |
37 | if (wm831x == NULL) |
38 | return -ENOMEM; |
39 | |
40 | i2c_set_clientdata(client: i2c, data: 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(ptr: wm831x->regmap)) { |
46 | ret = PTR_ERR(ptr: 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, irq: i2c->irq); |
56 | } |
57 | |
58 | static 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 | |
65 | static 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 | |
74 | static 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 | |
85 | static const struct dev_pm_ops wm831x_pm_ops = { |
86 | .suspend = wm831x_i2c_suspend, |
87 | .poweroff = wm831x_i2c_poweroff, |
88 | }; |
89 | |
90 | static 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 | |
101 | static 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 | } |
111 | subsys_initcall(wm831x_i2c_init); |
112 | |