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