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1 | /* |
2 | * wm831x-i2c.c -- I2C access for Wolfson WM831x PMICs | |
3 | * | |
4 | * Copyright 2009,2010 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/i2c.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/mfd/core.h> | |
20 | #include <linux/slab.h> | |
1df5981b | 21 | #include <linux/err.h> |
f6dd8449 CK |
22 | #include <linux/of.h> |
23 | #include <linux/of_device.h> | |
1df5981b | 24 | #include <linux/regmap.h> |
e5b48684 MB |
25 | |
26 | #include <linux/mfd/wm831x/core.h> | |
27 | #include <linux/mfd/wm831x/pdata.h> | |
28 | ||
e5b48684 MB |
29 | static int wm831x_i2c_probe(struct i2c_client *i2c, |
30 | const struct i2c_device_id *id) | |
31 | { | |
f6dd8449 CK |
32 | struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev); |
33 | const struct of_device_id *of_id; | |
e5b48684 | 34 | struct wm831x *wm831x; |
f6dd8449 | 35 | enum wm831x_parent type; |
1df5981b | 36 | int ret; |
e5b48684 | 37 | |
f6dd8449 CK |
38 | if (i2c->dev.of_node) { |
39 | of_id = of_match_device(wm831x_of_match, &i2c->dev); | |
40 | type = (enum wm831x_parent)of_id->data; | |
41 | } else { | |
42 | type = (enum wm831x_parent)id->driver_data; | |
43 | } | |
44 | ||
d48cbb74 | 45 | wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL); |
e5b48684 MB |
46 | if (wm831x == NULL) |
47 | return -ENOMEM; | |
48 | ||
49 | i2c_set_clientdata(i2c, wm831x); | |
50 | wm831x->dev = &i2c->dev; | |
f6dd8449 | 51 | wm831x->type = type; |
1df5981b | 52 | |
130a7032 | 53 | wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config); |
1df5981b MB |
54 | if (IS_ERR(wm831x->regmap)) { |
55 | ret = PTR_ERR(wm831x->regmap); | |
56 | dev_err(wm831x->dev, "Failed to allocate register map: %d\n", | |
57 | ret); | |
1df5981b MB |
58 | return ret; |
59 | } | |
e5b48684 | 60 | |
f6dd8449 CK |
61 | if (pdata) |
62 | memcpy(&wm831x->pdata, pdata, sizeof(*pdata)); | |
63 | ||
64 | return wm831x_device_init(wm831x, i2c->irq); | |
e5b48684 MB |
65 | } |
66 | ||
67 | static int wm831x_i2c_remove(struct i2c_client *i2c) | |
68 | { | |
69 | struct wm831x *wm831x = i2c_get_clientdata(i2c); | |
70 | ||
71 | wm831x_device_exit(wm831x); | |
72 | ||
73 | return 0; | |
74 | } | |
75 | ||
c538ddbe | 76 | static int wm831x_i2c_suspend(struct device *dev) |
e5b48684 | 77 | { |
c538ddbe | 78 | struct wm831x *wm831x = dev_get_drvdata(dev); |
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79 | |
80 | return wm831x_device_suspend(wm831x); | |
81 | } | |
82 | ||
b9736a16 | 83 | static int wm831x_i2c_poweroff(struct device *dev) |
523d9cfb | 84 | { |
b9736a16 | 85 | struct wm831x *wm831x = dev_get_drvdata(dev); |
523d9cfb MB |
86 | |
87 | wm831x_device_shutdown(wm831x); | |
b9736a16 MB |
88 | |
89 | return 0; | |
523d9cfb MB |
90 | } |
91 | ||
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92 | static const struct i2c_device_id wm831x_i2c_id[] = { |
93 | { "wm8310", WM8310 }, | |
94 | { "wm8311", WM8311 }, | |
95 | { "wm8312", WM8312 }, | |
96 | { "wm8320", WM8320 }, | |
97 | { "wm8321", WM8321 }, | |
98 | { "wm8325", WM8325 }, | |
412dc11d | 99 | { "wm8326", WM8326 }, |
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100 | { } |
101 | }; | |
102 | MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id); | |
103 | ||
c538ddbe MB |
104 | static const struct dev_pm_ops wm831x_pm_ops = { |
105 | .suspend = wm831x_i2c_suspend, | |
b9736a16 | 106 | .poweroff = wm831x_i2c_poweroff, |
c538ddbe | 107 | }; |
e5b48684 MB |
108 | |
109 | static struct i2c_driver wm831x_i2c_driver = { | |
110 | .driver = { | |
c538ddbe | 111 | .name = "wm831x", |
c538ddbe | 112 | .pm = &wm831x_pm_ops, |
f6dd8449 | 113 | .of_match_table = of_match_ptr(wm831x_of_match), |
e5b48684 MB |
114 | }, |
115 | .probe = wm831x_i2c_probe, | |
116 | .remove = wm831x_i2c_remove, | |
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117 | .id_table = wm831x_i2c_id, |
118 | }; | |
119 | ||
120 | static int __init wm831x_i2c_init(void) | |
121 | { | |
122 | int ret; | |
123 | ||
124 | ret = i2c_add_driver(&wm831x_i2c_driver); | |
125 | if (ret != 0) | |
126 | pr_err("Failed to register wm831x I2C driver: %d\n", ret); | |
127 | ||
128 | return ret; | |
129 | } | |
130 | subsys_initcall(wm831x_i2c_init); | |
131 | ||
132 | static void __exit wm831x_i2c_exit(void) | |
133 | { | |
134 | i2c_del_driver(&wm831x_i2c_driver); | |
135 | } | |
136 | module_exit(wm831x_i2c_exit); |