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
21static 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
28static 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
44static const struct acpi_device_id hts221_acpi_match[] = {
45	{"SMO9100", 0},
46	{ },
47};
48MODULE_DEVICE_TABLE(acpi, hts221_acpi_match);
49
50static const struct of_device_id hts221_i2c_of_match[] = {
51	{ .compatible = "st,hts221", },
52	{},
53};
54MODULE_DEVICE_TABLE(of, hts221_i2c_of_match);
55
56static const struct i2c_device_id hts221_i2c_id_table[] = {
57	{ HTS221_DEV_NAME },
58	{},
59};
60MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table);
61
62static 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};
72module_i2c_driver(hts221_driver);
73
74MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
75MODULE_DESCRIPTION("STMicroelectronics hts221 i2c driver");
76MODULE_LICENSE("GPL v2");
77