rm3100-i2c.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Support for PNI RM3100 3-axis geomagnetic sensor on a i2c bus.
 4 *
 5 * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
 6 *
 7 * i2c slave address: 0x20 + SA1 << 1 + SA0.
 8 */
 9
10#include <linux/i2c.h>
11#include <linux/module.h>
12
13#include "rm3100.h"
14
15static const struct regmap_config rm3100_regmap_config = {
16	.reg_bits = 8,
17	.val_bits = 8,
18
19	.rd_table = &rm3100_readable_table,
20	.wr_table = &rm3100_writable_table,
21	.volatile_table = &rm3100_volatile_table,
22
23	.cache_type = REGCACHE_RBTREE,
24};
25
26static int rm3100_probe(struct i2c_client *client)
27{
28	struct regmap *regmap;
29
30	regmap = devm_regmap_init_i2c(client, &rm3100_regmap_config);
31	if (IS_ERR(regmap))
32		return PTR_ERR(regmap);
33
34	return rm3100_common_probe(&client->dev, regmap, client->irq);
35}
36
37static const struct of_device_id rm3100_dt_match[] = {
38	{ .compatible = "pni,rm3100", },
39	{ }
40};
41MODULE_DEVICE_TABLE(of, rm3100_dt_match);
42
43static struct i2c_driver rm3100_driver = {
44	.driver = {
45		.name = "rm3100-i2c",
46		.of_match_table = rm3100_dt_match,
47	},
48	.probe = rm3100_probe,
49};
50module_i2c_driver(rm3100_driver);
51
52MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
53MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver");
54MODULE_LICENSE("GPL v2");
55MODULE_IMPORT_NS("IIO_RM3100");