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