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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);
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>
21#include <linux/err.h>
22#include <linux/regmap.h>
23
24#include <linux/mfd/wm831x/core.h>
25#include <linux/mfd/wm831x/pdata.h>
26
27static int wm831x_i2c_probe(struct i2c_client *i2c,
28 const struct i2c_device_id *id)
29{
30 struct wm831x *wm831x;
31 int ret;
32
33 wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
34 if (wm831x == NULL)
35 return -ENOMEM;
36
37 i2c_set_clientdata(i2c, wm831x);
38 wm831x->dev = &i2c->dev;
39
40 wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
41 if (IS_ERR(wm831x->regmap)) {
42 ret = PTR_ERR(wm831x->regmap);
43 dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
44 ret);
45 return ret;
46 }
47
48 return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
49}
50
51static int wm831x_i2c_remove(struct i2c_client *i2c)
52{
53 struct wm831x *wm831x = i2c_get_clientdata(i2c);
54
55 wm831x_device_exit(wm831x);
56
57 return 0;
58}
59
60static int wm831x_i2c_suspend(struct device *dev)
61{
62 struct wm831x *wm831x = dev_get_drvdata(dev);
63
64 return wm831x_device_suspend(wm831x);
65}
66
67static int wm831x_i2c_poweroff(struct device *dev)
68{
69 struct wm831x *wm831x = dev_get_drvdata(dev);
70
71 wm831x_device_shutdown(wm831x);
72
73 return 0;
74}
75
76static const struct i2c_device_id wm831x_i2c_id[] = {
77 { "wm8310", WM8310 },
78 { "wm8311", WM8311 },
79 { "wm8312", WM8312 },
80 { "wm8320", WM8320 },
81 { "wm8321", WM8321 },
82 { "wm8325", WM8325 },
83 { "wm8326", WM8326 },
84 { }
85};
86MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
87
88static const struct dev_pm_ops wm831x_pm_ops = {
89 .suspend = wm831x_i2c_suspend,
90 .poweroff = wm831x_i2c_poweroff,
91};
92
93static struct i2c_driver wm831x_i2c_driver = {
94 .driver = {
95 .name = "wm831x",
96 .pm = &wm831x_pm_ops,
97 },
98 .probe = wm831x_i2c_probe,
99 .remove = wm831x_i2c_remove,
100 .id_table = wm831x_i2c_id,
101};
102
103static int __init wm831x_i2c_init(void)
104{
105 int ret;
106
107 ret = i2c_add_driver(&wm831x_i2c_driver);
108 if (ret != 0)
109 pr_err("Failed to register wm831x I2C driver: %d\n", ret);
110
111 return ret;
112}
113subsys_initcall(wm831x_i2c_init);
114
115static void __exit wm831x_i2c_exit(void)
116{
117 i2c_del_driver(&wm831x_i2c_driver);
118}
119module_exit(wm831x_i2c_exit);