1 /*
2  * STMicroelectronics hts221 i2c driver
3  *
4  * Copyright 2016 STMicroelectronics Inc.
5  *
6  * Lorenzo Bianconi <lorenzo.bianconi@st.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 "hts221.h"
19 
20 #define HTS221_I2C_AUTO_INCREMENT	BIT(7)
21 
22 static const struct regmap_config hts221_i2c_regmap_config = {
23 	.reg_bits = 8,
24 	.val_bits = 8,
25 	.write_flag_mask = HTS221_I2C_AUTO_INCREMENT,
26 	.read_flag_mask = HTS221_I2C_AUTO_INCREMENT,
27 };
28 
29 static int hts221_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, &hts221_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 hts221_probe(&client->dev, client->irq,
42 			    client->name, regmap);
43 }
44 
45 static const struct acpi_device_id hts221_acpi_match[] = {
46 	{"SMO9100", 0},
47 	{ },
48 };
49 MODULE_DEVICE_TABLE(acpi, hts221_acpi_match);
50 
51 static const struct of_device_id hts221_i2c_of_match[] = {
52 	{ .compatible = "st,hts221", },
53 	{},
54 };
55 MODULE_DEVICE_TABLE(of, hts221_i2c_of_match);
56 
57 static const struct i2c_device_id hts221_i2c_id_table[] = {
58 	{ HTS221_DEV_NAME },
59 	{},
60 };
61 MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table);
62 
63 static struct i2c_driver hts221_driver = {
64 	.driver = {
65 		.name = "hts221_i2c",
66 		.pm = &hts221_pm_ops,
67 		.of_match_table = of_match_ptr(hts221_i2c_of_match),
68 		.acpi_match_table = ACPI_PTR(hts221_acpi_match),
69 	},
70 	.probe = hts221_i2c_probe,
71 	.id_table = hts221_i2c_id_table,
72 };
73 module_i2c_driver(hts221_driver);
74 
75 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
76 MODULE_DESCRIPTION("STMicroelectronics hts221 i2c driver");
77 MODULE_LICENSE("GPL v2");
78