1 // SPDX-License-Identifier: GPL-2.0
3 // cs35l41-i2c.c -- CS35l41 I2C driver
5 // Copyright 2017-2021 Cirrus Logic, Inc.
7 // Author: David Rhodes <david.rhodes@cirrus.com>
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>
22 static const struct i2c_device_id cs35l41_id_i2c[] = {
30 MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
32 static int cs35l41_i2c_probe(struct i2c_client *client,
33 const struct i2c_device_id *id)
35 struct cs35l41_private *cs35l41;
36 struct device *dev = &client->dev;
37 struct cs35l41_platform_data *pdata = dev_get_platdata(dev);
38 const struct regmap_config *regmap_config = &cs35l41_regmap_i2c;
41 cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
47 cs35l41->irq = client->irq;
49 i2c_set_clientdata(client, cs35l41);
50 cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
51 if (IS_ERR(cs35l41->regmap)) {
52 ret = PTR_ERR(cs35l41->regmap);
53 dev_err(cs35l41->dev, "Failed to allocate register map: %d\n", ret);
57 return cs35l41_probe(cs35l41, pdata);
60 static int cs35l41_i2c_remove(struct i2c_client *client)
62 struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
64 cs35l41_remove(cs35l41);
70 static const struct of_device_id cs35l41_of_match[] = {
71 { .compatible = "cirrus,cs35l40" },
72 { .compatible = "cirrus,cs35l41" },
75 MODULE_DEVICE_TABLE(of, cs35l41_of_match);
79 static const struct acpi_device_id cs35l41_acpi_match[] = {
80 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
83 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
86 static struct i2c_driver cs35l41_i2c_driver = {
89 .pm = &cs35l41_pm_ops,
90 .of_match_table = of_match_ptr(cs35l41_of_match),
91 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
93 .id_table = cs35l41_id_i2c,
94 .probe = cs35l41_i2c_probe,
95 .remove = cs35l41_i2c_remove,
98 module_i2c_driver(cs35l41_i2c_driver);
100 MODULE_DESCRIPTION("I2C CS35L41 driver");
101 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
102 MODULE_LICENSE("GPL");