1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Support for PNI RM3100 3-axis geomagnetic sensor on a i2c bus.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * i2c slave address: 0x20 + SA1 << 1 + SA0.
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/i2c.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "rm3100.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun static const struct regmap_config rm3100_regmap_config = {
16*4882a593Smuzhiyun .reg_bits = 8,
17*4882a593Smuzhiyun .val_bits = 8,
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun .rd_table = &rm3100_readable_table,
20*4882a593Smuzhiyun .wr_table = &rm3100_writable_table,
21*4882a593Smuzhiyun .volatile_table = &rm3100_volatile_table,
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun .cache_type = REGCACHE_RBTREE,
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
rm3100_probe(struct i2c_client * client)26*4882a593Smuzhiyun static int rm3100_probe(struct i2c_client *client)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun struct regmap *regmap;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun regmap = devm_regmap_init_i2c(client, &rm3100_regmap_config);
31*4882a593Smuzhiyun if (IS_ERR(regmap))
32*4882a593Smuzhiyun return PTR_ERR(regmap);
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun return rm3100_common_probe(&client->dev, regmap, client->irq);
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun static const struct of_device_id rm3100_dt_match[] = {
38*4882a593Smuzhiyun { .compatible = "pni,rm3100", },
39*4882a593Smuzhiyun { }
40*4882a593Smuzhiyun };
41*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, rm3100_dt_match);
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun static struct i2c_driver rm3100_driver = {
44*4882a593Smuzhiyun .driver = {
45*4882a593Smuzhiyun .name = "rm3100-i2c",
46*4882a593Smuzhiyun .of_match_table = rm3100_dt_match,
47*4882a593Smuzhiyun },
48*4882a593Smuzhiyun .probe_new = rm3100_probe,
49*4882a593Smuzhiyun };
50*4882a593Smuzhiyun module_i2c_driver(rm3100_driver);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
53*4882a593Smuzhiyun MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver");
54*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
55