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.h>
17 #include <linux/platform_device.h>
18 #include <linux/slab.h>
19
20 #include "cs35l41.h"
21
22 static const struct i2c_device_id cs35l41_id_i2c[] = {
23 { "cs35l40" },
24 { "cs35l41" },
25 { "cs35l51" },
26 { "cs35l53" },
27 {}
28 };
29
30 MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
31
cs35l41_i2c_probe(struct i2c_client * client)32 static 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
39 cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
40
41 if (!cs35l41)
42 return -ENOMEM;
43
44 cs35l41->dev = dev;
45 cs35l41->irq = client->irq;
46
47 i2c_set_clientdata(client, cs35l41);
48 cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
49 if (IS_ERR(cs35l41->regmap))
50 return dev_err_probe(cs35l41->dev, PTR_ERR(cs35l41->regmap),
51 "Failed to allocate register map\n");
52
53 return cs35l41_probe(cs35l41, hw_cfg);
54 }
55
cs35l41_i2c_remove(struct i2c_client * client)56 static void cs35l41_i2c_remove(struct i2c_client *client)
57 {
58 struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
59
60 cs35l41_remove(cs35l41);
61 }
62
63 #ifdef CONFIG_OF
64 static const struct of_device_id cs35l41_of_match[] = {
65 { .compatible = "cirrus,cs35l40" },
66 { .compatible = "cirrus,cs35l41" },
67 {},
68 };
69 MODULE_DEVICE_TABLE(of, cs35l41_of_match);
70 #endif
71
72 #ifdef CONFIG_ACPI
73 static const struct acpi_device_id cs35l41_acpi_match[] = {
74 { "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
75 {},
76 };
77 MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
78 #endif
79
80 static struct i2c_driver cs35l41_i2c_driver = {
81 .driver = {
82 .name = "cs35l41",
83 .pm = pm_ptr(&cs35l41_pm_ops),
84 .of_match_table = of_match_ptr(cs35l41_of_match),
85 .acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
86 },
87 .id_table = cs35l41_id_i2c,
88 .probe = cs35l41_i2c_probe,
89 .remove = cs35l41_i2c_remove,
90 };
91
92 module_i2c_driver(cs35l41_i2c_driver);
93
94 MODULE_DESCRIPTION("I2C CS35L41 driver");
95 MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
96 MODULE_LICENSE("GPL");
97