iio/accel/adxl372_i2c.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * ADXL372 3-Axis Digital Accelerometer I2C driver
0004  *
0005  * Copyright 2018 Analog Devices Inc.
0006  */
0007
0008 #include <linux/i2c.h>
0009 #include <linux/mod_devicetable.h>
0010 #include <linux/module.h>
0011 #include <linux/regmap.h>
0012
0013 #include "adxl372.h"
0014
0015 static const struct regmap_config adxl372_regmap_config = {
0016     .reg_bits = 8,
0017     .val_bits = 8,
0018     .readable_noinc_reg = adxl372_readable_noinc_reg,
0019 };
0020
0021 static int adxl372_i2c_probe(struct i2c_client *client,
0022                  const struct i2c_device_id *id)
0023 {
0024     struct regmap *regmap;
0025     unsigned int regval;
0026     int ret;
0027
0028     regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config);
0029     if (IS_ERR(regmap))
0030         return PTR_ERR(regmap);
0031
0032     ret = regmap_read(regmap, ADXL372_REVID, &regval);
0033     if (ret < 0)
0034         return ret;
0035
0036     /* Starting with the 3rd revision an I2C chip bug was fixed */
0037     if (regval < 3)
0038         dev_warn(&client->dev,
0039         "I2C might not work properly with other devices on the bus");
0040
0041     return adxl372_probe(&client->dev, regmap, client->irq, id->name);
0042 }
0043
0044 static const struct i2c_device_id adxl372_i2c_id[] = {
0045     { "adxl372", 0 },
0046     {}
0047 };
0048 MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id);
0049
0050 static const struct of_device_id adxl372_of_match[] = {
0051     { .compatible = "adi,adxl372" },
0052     { }
0053 };
0054 MODULE_DEVICE_TABLE(of, adxl372_of_match);
0055
0056 static struct i2c_driver adxl372_i2c_driver = {
0057     .driver = {
0058         .name = "adxl372_i2c",
0059         .of_match_table = adxl372_of_match,
0060     },
0061     .probe = adxl372_i2c_probe,
0062     .id_table = adxl372_i2c_id,
0063 };
0064
0065 module_i2c_driver(adxl372_i2c_driver);
0066
0067 MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
0068 MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver");
0069 MODULE_LICENSE("GPL");
0070 MODULE_IMPORT_NS(IIO_ADXL372);