drivers/iio/accel/adxl345_i2c.c

   1 /*
   2  * ADXL345 3-Axis Digital Accelerometer I2C driver
   3  *
   4  * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
   5  *
   6  * This file is subject to the terms and conditions of version 2 of
   7  * the GNU General Public License. See the file COPYING in the main
   8  * directory of this archive for more details.
   9  *
  10  * 7-bit I2C slave address: 0x1D (ALT ADDRESS pin tied to VDDIO) or
  11  * 0x53 (ALT ADDRESS pin grounded)
  12  */
  13
  14 #include <linux/i2c.h>
  15 #include <linux/module.h>
  16 #include <linux/regmap.h>
  17
  18 #include "adxl345.h"
  19
  20 static const struct regmap_config adxl345_i2c_regmap_config = {
  21         .reg_bits = 8,
  22         .val_bits = 8,
  23 };
  24
  25 static int adxl345_i2c_probe(struct i2c_client *client,
  26                              const struct i2c_device_id *id)
  27 {
  28         struct regmap *regmap;
  29
  30         if (!id)
  31                 return -ENODEV;
  32
  33         regmap = devm_regmap_init_i2c(client, &adxl345_i2c_regmap_config);
  34         if (IS_ERR(regmap)) {
  35                 dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
  36                         PTR_ERR(regmap));
  37                 return PTR_ERR(regmap);
  38         }
  39
  40         return adxl345_core_probe(&client->dev, regmap, id->driver_data,
  41                                   id->name);
  42 }
  43
  44 static int adxl345_i2c_remove(struct i2c_client *client)
  45 {
  46         return adxl345_core_remove(&client->dev);
  47 }
  48
  49 static const struct i2c_device_id adxl345_i2c_id[] = {
  50         { "adxl345", ADXL345 },
  51         { "adxl375", ADXL375 },
  52         { }
  53 };
  54
  55 MODULE_DEVICE_TABLE(i2c, adxl345_i2c_id);
  56
  57 static const struct of_device_id adxl345_of_match[] = {
  58         { .compatible = "adi,adxl345" },
  59         { .compatible = "adi,adxl375" },
  60         { },
  61 };
  62
  63 MODULE_DEVICE_TABLE(of, adxl345_of_match);
  64
  65 static struct i2c_driver adxl345_i2c_driver = {
  66         .driver = {
  67                 .name   = "adxl345_i2c",
  68                 .of_match_table = adxl345_of_match,
  69         },
  70         .probe          = adxl345_i2c_probe,
  71         .remove         = adxl345_i2c_remove,
  72         .id_table       = adxl345_i2c_id,
  73 };
  74
  75 module_i2c_driver(adxl345_i2c_driver);
  76
  77 MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
  78 MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer I2C driver");
  79 MODULE_LICENSE("GPL v2");