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 
15 static 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 
26 static 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 
37 static const struct of_device_id rm3100_dt_match[] = {
38 	{ .compatible = "pni,rm3100", },
39 	{ }
40 };
41 MODULE_DEVICE_TABLE(of, rm3100_dt_match);
42 
43 static struct i2c_driver rm3100_driver = {
44 	.driver = {
45 		.name = "rm3100-i2c",
46 		.of_match_table = rm3100_dt_match,
47 	},
48 	.probe_new = rm3100_probe,
49 };
50 module_i2c_driver(rm3100_driver);
51 
52 MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
53 MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver");
54 MODULE_LICENSE("GPL v2");
55