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         regmap = devm_regmap_init_i2c(client, &adxl345_i2c_regmap_config);
  31         if (IS_ERR(regmap)) {
  32                 dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
  33                         PTR_ERR(regmap));
  34                 return PTR_ERR(regmap);
  35         }
  36
  37         return adxl345_core_probe(&client->dev, regmap, id->driver_data,
  38                                   id ? id->name : NULL);
  39 }
  40
  41 static int adxl345_i2c_remove(struct i2c_client *client)
  42 {
  43         return adxl345_core_remove(&client->dev);
  44 }
  45
  46 static const struct i2c_device_id adxl345_i2c_id[] = {
  47         { "adxl345", ADXL345 },
  48         { "adxl375", ADXL375 },
  49         { }
  50 };
  51
  52 MODULE_DEVICE_TABLE(i2c, adxl345_i2c_id);
  53
  54 static const struct of_device_id adxl345_of_match[] = {
  55         { .compatible = "adi,adxl345" },
  56         { .compatible = "adi,adxl375" },
  57         { },
  58 };
  59
  60 MODULE_DEVICE_TABLE(of, adxl345_of_match);
  61
  62 static struct i2c_driver adxl345_i2c_driver = {
  63         .driver = {
  64                 .name   = "adxl345_i2c",
  65                 .of_match_table = adxl345_of_match,
  66         },
  67         .probe          = adxl345_i2c_probe,
  68         .remove         = adxl345_i2c_remove,
  69         .id_table       = adxl345_i2c_id,
  70 };
  71
  72 module_i2c_driver(adxl345_i2c_driver);
  73
  74 MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
  75 MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer I2C driver");
  76 MODULE_LICENSE("GPL v2");