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Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0
2//
3// cs35l41-i2c.c -- CS35l41 I2C driver
4//
5// Copyright 2017-2021 Cirrus Logic, Inc.
6//
7// Author: David Rhodes <david.rhodes@cirrus.com>
8
9#include <linux/acpi.h>
10#include <linux/delay.h>
11#include <linux/i2c.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/of_device.h>
17#include <linux/platform_device.h>
18#include <linux/slab.h>
19
20#include "cs35l41.h"
21
22static const struct i2c_device_id cs35l41_id_i2c[] = {
23 { "cs35l40", 0 },
24 { "cs35l41", 0 },
25 { "cs35l51", 0 },
26 { "cs35l53", 0 },
27 {}
28};
29
30MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
31
32static int cs35l41_i2c_probe(struct i2c_client *client)
33{
34 struct cs35l41_private *cs35l41;
35 struct device *dev = &client->dev;
36 struct cs35l41_hw_cfg *hw_cfg = dev_get_platdata(dev);
37 const struct regmap_config *regmap_config = &cs35l41_regmap_i2c;
38 int ret;
39
40 cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
41
42 if (!cs35l41)
43 return -ENOMEM;
44
45 cs35l41->dev = dev;
46 cs35l41->irq = client->irq;
47
48 i2c_set_clientdata(client, cs35l41);
49 cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
50 if (IS_ERR(cs35l41->regmap)) {
51 ret = PTR_ERR(cs35l41->regmap);
52 dev_err(cs35l41->dev, "Failed to allocate register map: %d\n", ret);
53 return ret;
54 }
55
56 return cs35l41_probe(cs35l41, hw_cfg);
57}
58
59static int cs35l41_i2c_remove(struct i2c_client *client)
60{
61 struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
62
63 cs35l41_remove(cs35l41);
64
65 return 0;
66}
67
68#ifdef CONFIG_OF
69static const struct of_device_id cs35l41_of_match[] = {
70 { .compatible = "cirrus,cs35l40" },
71 { .compatible = "cirrus,cs35l41" },
72 {},
73};
74MODULE_DEVICE_TABLE(of, cs35l41_of_match);
75#endif
76
77#ifdef CONFIG_ACPI
78static const struct acpi_device_id cs35l41_acpi_match[] = {
79 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
80 {},
81};
82MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
83#endif
84
85static struct i2c_driver cs35l41_i2c_driver = {
86 .driver = {
87 .name = "cs35l41",
88 .pm = &cs35l41_pm_ops,
89 .of_match_table = of_match_ptr(cs35l41_of_match),
90 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
91 },
92 .id_table = cs35l41_id_i2c,
93 .probe_new = cs35l41_i2c_probe,
94 .remove = cs35l41_i2c_remove,
95};
96
97module_i2c_driver(cs35l41_i2c_driver);
98
99MODULE_DESCRIPTION("I2C CS35L41 driver");
100MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
101MODULE_LICENSE("GPL");