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)28 static int hts221_i2c_probe(struct i2c_client *client)
29 {
30 	struct regmap *regmap;
31 
32 	regmap = devm_regmap_init_i2c(client, &hts221_i2c_regmap_config);
33 	if (IS_ERR(regmap)) {
34 		dev_err(&client->dev, "Failed to register i2c regmap %ld\n",
35 			PTR_ERR(regmap));
36 		return PTR_ERR(regmap);
37 	}
38 
39 	return hts221_probe(&client->dev, client->irq,
40 			    client->name, regmap);
41 }
42 
43 static const struct acpi_device_id hts221_acpi_match[] = {
44 	{"SMO9100", 0},
45 	{ },
46 };
47 MODULE_DEVICE_TABLE(acpi, hts221_acpi_match);
48 
49 static const struct of_device_id hts221_i2c_of_match[] = {
50 	{ .compatible = "st,hts221", },
51 	{},
52 };
53 MODULE_DEVICE_TABLE(of, hts221_i2c_of_match);
54 
55 static const struct i2c_device_id hts221_i2c_id_table[] = {
56 	{ HTS221_DEV_NAME },
57 	{},
58 };
59 MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table);
60 
61 static struct i2c_driver hts221_driver = {
62 	.driver = {
63 		.name = "hts221_i2c",
64 		.pm = pm_sleep_ptr(&hts221_pm_ops),
65 		.of_match_table = hts221_i2c_of_match,
66 		.acpi_match_table = ACPI_PTR(hts221_acpi_match),
67 	},
68 	.probe = hts221_i2c_probe,
69 	.id_table = hts221_i2c_id_table,
70 };
71 module_i2c_driver(hts221_driver);
72 
73 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
74 MODULE_DESCRIPTION("STMicroelectronics hts221 i2c driver");
75 MODULE_LICENSE("GPL v2");
76 MODULE_IMPORT_NS(IIO_HTS221);
77