1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * STMicroelectronics hts221 i2c driver
4 *
5 * Copyright 2016 STMicroelectronics Inc.
6 *
7 * Lorenzo Bianconi <lorenzo.bianconi@st.com>
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/acpi.h>
13 #include <linux/i2c.h>
14 #include <linux/slab.h>
15 #include <linux/regmap.h>
16
17 #include "hts221.h"
18
19 #define HTS221_I2C_AUTO_INCREMENT BIT(7)
20
21 static const struct regmap_config hts221_i2c_regmap_config = {
22 .reg_bits = 8,
23 .val_bits = 8,
24 .write_flag_mask = HTS221_I2C_AUTO_INCREMENT,
25 .read_flag_mask = HTS221_I2C_AUTO_INCREMENT,
26 };
27
hts221_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)28 static int hts221_i2c_probe(struct i2c_client *client,
29 const struct i2c_device_id *id)
30 {
31 struct regmap *regmap;
32
33 regmap = devm_regmap_init_i2c(client, &hts221_i2c_regmap_config);
34 if (IS_ERR(regmap)) {
35 dev_err(&client->dev, "Failed to register i2c regmap %ld\n",
36 PTR_ERR(regmap));
37 return PTR_ERR(regmap);
38 }
39
40 return hts221_probe(&client->dev, client->irq,
41 client->name, regmap);
42 }
43
44 static const struct acpi_device_id hts221_acpi_match[] = {
45 {"SMO9100", 0},
46 { },
47 };
48 MODULE_DEVICE_TABLE(acpi, hts221_acpi_match);
49
50 static const struct of_device_id hts221_i2c_of_match[] = {
51 { .compatible = "st,hts221", },
52 {},
53 };
54 MODULE_DEVICE_TABLE(of, hts221_i2c_of_match);
55
56 static const struct i2c_device_id hts221_i2c_id_table[] = {
57 { HTS221_DEV_NAME },
58 {},
59 };
60 MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table);
61
62 static struct i2c_driver hts221_driver = {
63 .driver = {
64 .name = "hts221_i2c",
65 .pm = &hts221_pm_ops,
66 .of_match_table = hts221_i2c_of_match,
67 .acpi_match_table = ACPI_PTR(hts221_acpi_match),
68 },
69 .probe = hts221_i2c_probe,
70 .id_table = hts221_i2c_id_table,
71 };
72 module_i2c_driver(hts221_driver);
73
74 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
75 MODULE_DESCRIPTION("STMicroelectronics hts221 i2c driver");
76 MODULE_LICENSE("GPL v2");
77