1 /*
2 * STMicroelectronics uvis25 i2c driver
3 *
4 * Copyright 2017 STMicroelectronics Inc.
5 *
6 * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
7 *
8 * Licensed under the GPL-2.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/acpi.h>
14 #include <linux/i2c.h>
15 #include <linux/slab.h>
16 #include <linux/regmap.h>
17
18 #include "st_uvis25.h"
19
20 #define UVIS25_I2C_AUTO_INCREMENT BIT(7)
21
22 static const struct regmap_config st_uvis25_i2c_regmap_config = {
23 .reg_bits = 8,
24 .val_bits = 8,
25 .write_flag_mask = UVIS25_I2C_AUTO_INCREMENT,
26 .read_flag_mask = UVIS25_I2C_AUTO_INCREMENT,
27 };
28
st_uvis25_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)29 static int st_uvis25_i2c_probe(struct i2c_client *client,
30 const struct i2c_device_id *id)
31 {
32 struct regmap *regmap;
33
34 regmap = devm_regmap_init_i2c(client, &st_uvis25_i2c_regmap_config);
35 if (IS_ERR(regmap)) {
36 dev_err(&client->dev, "Failed to register i2c regmap %d\n",
37 (int)PTR_ERR(regmap));
38 return PTR_ERR(regmap);
39 }
40
41 return st_uvis25_probe(&client->dev, client->irq, regmap);
42 }
43
44 static const struct of_device_id st_uvis25_i2c_of_match[] = {
45 { .compatible = "st,uvis25", },
46 {},
47 };
48 MODULE_DEVICE_TABLE(of, st_uvis25_i2c_of_match);
49
50 static const struct i2c_device_id st_uvis25_i2c_id_table[] = {
51 { ST_UVIS25_DEV_NAME },
52 {},
53 };
54 MODULE_DEVICE_TABLE(i2c, st_uvis25_i2c_id_table);
55
56 static struct i2c_driver st_uvis25_driver = {
57 .driver = {
58 .name = "st_uvis25_i2c",
59 .pm = &st_uvis25_pm_ops,
60 .of_match_table = of_match_ptr(st_uvis25_i2c_of_match),
61 },
62 .probe = st_uvis25_i2c_probe,
63 .id_table = st_uvis25_i2c_id_table,
64 };
65 module_i2c_driver(st_uvis25_driver);
66
67 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
68 MODULE_DESCRIPTION("STMicroelectronics uvis25 i2c driver");
69 MODULE_LICENSE("GPL v2");
70
