tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
14static 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
20static 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, ®val);
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
43static const struct i2c_device_id adxl372_i2c_id[] = {
44 { "adxl372", 0 },
45 {}
46};
47MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id);
48
49static 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
57module_i2c_driver(adxl372_i2c_driver);
58
59MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
60MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver");
61MODULE_LICENSE("GPL");