drivers/iio/magnetometer/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
  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");