1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * cs42l42-i2c.c -- CS42L42 ALSA SoC audio driver for I2C
4 *
5 * Copyright 2016, 2022 Cirrus Logic, Inc.
6 */
7
8 #include <linux/i2c.h>
9 #include <linux/module.h>
10 #include <linux/regmap.h>
11 #include <linux/slab.h>
12 #include <linux/types.h>
13
14 #include "cs42l42.h"
15
cs42l42_i2c_probe(struct i2c_client * i2c_client)16 static int cs42l42_i2c_probe(struct i2c_client *i2c_client)
17 {
18 struct device *dev = &i2c_client->dev;
19 struct cs42l42_private *cs42l42;
20 struct regmap *regmap;
21 int ret;
22
23 cs42l42 = devm_kzalloc(dev, sizeof(*cs42l42), GFP_KERNEL);
24 if (!cs42l42)
25 return -ENOMEM;
26
27 regmap = devm_regmap_init_i2c(i2c_client, &cs42l42_regmap);
28 if (IS_ERR(regmap))
29 return dev_err_probe(&i2c_client->dev, PTR_ERR(regmap),
30 "regmap_init() failed\n");
31
32 cs42l42->devid = CS42L42_CHIP_ID;
33 cs42l42->dev = dev;
34 cs42l42->regmap = regmap;
35 cs42l42->irq = i2c_client->irq;
36
37 ret = cs42l42_common_probe(cs42l42, &cs42l42_soc_component, &cs42l42_dai);
38 if (ret)
39 return ret;
40
41 return cs42l42_init(cs42l42);
42 }
43
cs42l42_i2c_remove(struct i2c_client * i2c_client)44 static void cs42l42_i2c_remove(struct i2c_client *i2c_client)
45 {
46 struct cs42l42_private *cs42l42 = dev_get_drvdata(&i2c_client->dev);
47
48 cs42l42_common_remove(cs42l42);
49 }
50
cs42l42_i2c_resume(struct device * dev)51 static int __maybe_unused cs42l42_i2c_resume(struct device *dev)
52 {
53 int ret;
54
55 ret = cs42l42_resume(dev);
56 if (ret)
57 return ret;
58
59 cs42l42_resume_restore(dev);
60
61 return 0;
62 }
63
64 static const struct dev_pm_ops cs42l42_i2c_pm_ops = {
65 SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_i2c_resume)
66 };
67
68 static const struct of_device_id __maybe_unused cs42l42_of_match[] = {
69 { .compatible = "cirrus,cs42l42", },
70 {}
71 };
72 MODULE_DEVICE_TABLE(of, cs42l42_of_match);
73
74 static const struct acpi_device_id __maybe_unused cs42l42_acpi_match[] = {
75 {"10134242", 0,},
76 {}
77 };
78 MODULE_DEVICE_TABLE(acpi, cs42l42_acpi_match);
79
80 static const struct i2c_device_id cs42l42_id[] = {
81 {"cs42l42", 0},
82 {}
83 };
84
85 MODULE_DEVICE_TABLE(i2c, cs42l42_id);
86
87 static struct i2c_driver cs42l42_i2c_driver = {
88 .driver = {
89 .name = "cs42l42",
90 .pm = &cs42l42_i2c_pm_ops,
91 .of_match_table = of_match_ptr(cs42l42_of_match),
92 .acpi_match_table = ACPI_PTR(cs42l42_acpi_match),
93 },
94 .id_table = cs42l42_id,
95 .probe = cs42l42_i2c_probe,
96 .remove = cs42l42_i2c_remove,
97 };
98
99 module_i2c_driver(cs42l42_i2c_driver);
100
101 MODULE_DESCRIPTION("ASoC CS42L42 I2C driver");
102 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
103 MODULE_LICENSE("GPL");
104 MODULE_IMPORT_NS(SND_SOC_CS42L42_CORE);
105
