xref: /linux/sound/soc/codecs/cs42xx8-i2c.c (revision 0ea5c948cb64bab5bc7a5516774eb8536f05aa0d)
1 /*
2  * Cirrus Logic CS42448/CS42888 Audio CODEC DAI I2C driver
3  *
4  * Copyright (C) 2014 Freescale Semiconductor, Inc.
5  *
6  * Author: Nicolin Chen <Guangyu.Chen@freescale.com>
7  *
8  * This file is licensed under the terms of the GNU General Public License
9  * version 2. This program is licensed "as is" without any warranty of any
10  * kind, whether express or implied.
11  */
12 
13 #include <linux/i2c.h>
14 #include <linux/module.h>
15 #include <linux/mod_devicetable.h>
16 #include <linux/pm_runtime.h>
17 #include <sound/soc.h>
18 
19 #include "cs42xx8.h"
20 
cs42xx8_i2c_probe(struct i2c_client * i2c)21 static int cs42xx8_i2c_probe(struct i2c_client *i2c)
22 {
23 	int ret;
24 	struct cs42xx8_driver_data *drvdata;
25 
26 	drvdata = (struct cs42xx8_driver_data *)i2c_get_match_data(i2c);
27 	if (!drvdata)
28 		return dev_err_probe(&i2c->dev, -EINVAL,
29 				     "failed to find driver data\n");
30 
31 	ret = cs42xx8_probe(&i2c->dev,
32 		devm_regmap_init_i2c(i2c, &cs42xx8_regmap_config), drvdata);
33 	if (ret)
34 		return ret;
35 
36 	pm_runtime_enable(&i2c->dev);
37 	pm_request_idle(&i2c->dev);
38 
39 	return 0;
40 }
41 
cs42xx8_i2c_remove(struct i2c_client * i2c)42 static void cs42xx8_i2c_remove(struct i2c_client *i2c)
43 {
44 	pm_runtime_disable(&i2c->dev);
45 }
46 
47 static const struct of_device_id cs42xx8_of_match[] = {
48 	{ .compatible = "cirrus,cs42448", .data = &cs42448_data, },
49 	{ .compatible = "cirrus,cs42888", .data = &cs42888_data, },
50 	{ /* sentinel */ }
51 };
52 MODULE_DEVICE_TABLE(of, cs42xx8_of_match);
53 
54 static const struct i2c_device_id cs42xx8_i2c_id[] = {
55 	{"cs42448", (kernel_ulong_t)&cs42448_data},
56 	{"cs42888", (kernel_ulong_t)&cs42888_data},
57 	{}
58 };
59 MODULE_DEVICE_TABLE(i2c, cs42xx8_i2c_id);
60 
61 static struct i2c_driver cs42xx8_i2c_driver = {
62 	.driver = {
63 		.name = "cs42xx8",
64 		.pm = &cs42xx8_pm,
65 		.of_match_table = cs42xx8_of_match,
66 	},
67 	.probe = cs42xx8_i2c_probe,
68 	.remove = cs42xx8_i2c_remove,
69 	.id_table = cs42xx8_i2c_id,
70 };
71 
72 module_i2c_driver(cs42xx8_i2c_driver);
73 
74 MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec I2C Driver");
75 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
76 MODULE_LICENSE("GPL");
77