drivers/iio/accel/adxl372_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * ADXL372 3-Axis Digital Accelerometer I2C driver
   4  *
   5  * Copyright 2018 Analog Devices Inc.
   6  */
   7
   8 #include <linux/i2c.h>
   9 #include <linux/mod_devicetable.h>
  10 #include <linux/module.h>
  11 #include <linux/regmap.h>
  12
  13 #include "adxl372.h"
  14
  15 static const struct regmap_config adxl372_regmap_config = {
  16         .reg_bits = 8,
  17         .val_bits = 8,
  18         .readable_noinc_reg = adxl372_readable_noinc_reg,
  19 };
  20
  21 static int adxl372_i2c_probe(struct i2c_client *client)
  22 {
  23         const struct i2c_device_id *id = i2c_client_get_device_id(client);
  24         struct regmap *regmap;
  25         unsigned int regval;
  26         int ret;
  27
  28         regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config);
  29         if (IS_ERR(regmap))
  30                 return PTR_ERR(regmap);
  31
  32         ret = regmap_read(regmap, ADXL372_REVID, &regval);
  33         if (ret < 0)
  34                 return ret;
  35
  36         /* Starting with the 3rd revision an I2C chip bug was fixed */
  37         if (regval < 3)
  38                 dev_warn(&client->dev,
  39                 "I2C might not work properly with other devices on the bus");
  40
  41         return adxl372_probe(&client->dev, regmap, client->irq, id->name);
  42 }
  43
  44 static const struct i2c_device_id adxl372_i2c_id[] = {
  45         { "adxl372" },
  46         {}
  47 };
  48 MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id);
  49
  50 static const struct of_device_id adxl372_of_match[] = {
  51         { .compatible = "adi,adxl372" },
  52         { }
  53 };
  54 MODULE_DEVICE_TABLE(of, adxl372_of_match);
  55
  56 static struct i2c_driver adxl372_i2c_driver = {
  57         .driver = {
  58                 .name = "adxl372_i2c",
  59                 .of_match_table = adxl372_of_match,
  60         },
  61         .probe = adxl372_i2c_probe,
  62         .id_table = adxl372_i2c_id,
  63 };
  64
  65 module_i2c_driver(adxl372_i2c_driver);
  66
  67 MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
  68 MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver");
  69 MODULE_LICENSE("GPL");
  70 MODULE_IMPORT_NS(IIO_ADXL372);