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-only
2/*
3 * Bosch triaxial acceleration sensor
4 *
5 * Copyright (c) 2025 Petre Rodan <petre.rodan@subdimension.ro>
6 *
7 * Datasheet: https://media.digikey.com/pdf/Data%20Sheets/Bosch/BMA220.pdf
8 * I2C address is either 0x0b or 0x0a depending on CSB (pin 10)
9 */
10
11#include <linux/bitfield.h>
12#include <linux/i2c.h>
13#include <linux/mod_devicetable.h>
14#include <linux/module.h>
15#include <linux/regmap.h>
16#include <linux/types.h>
17
18#include "bma220.h"
19
20static int bma220_set_wdt(struct regmap *regmap, const u8 val)
21{
22 return regmap_update_bits(regmap, BMA220_REG_WDT, BMA220_WDT_MASK,
23 FIELD_PREP(BMA220_WDT_MASK, val));
24}
25
26static int bma220_i2c_probe(struct i2c_client *client)
27{
28 struct regmap *regmap;
29 int ret;
30
31 regmap = devm_regmap_init_i2c(client, &bma220_i2c_regmap_config);
32 if (IS_ERR(regmap))
33 return dev_err_probe(&client->dev, PTR_ERR(regmap),
34 "failed to create regmap\n");
35
36 ret = bma220_common_probe(&client->dev, regmap, client->irq);
37 if (ret)
38 return ret;
39
40 return bma220_set_wdt(regmap, BMA220_WDT_1MS);
41}
42
43static const struct of_device_id bma220_i2c_match[] = {
44 { .compatible = "bosch,bma220" },
45 { }
46};
47MODULE_DEVICE_TABLE(of, bma220_i2c_match);
48
49static const struct i2c_device_id bma220_i2c_id[] = {
50 { "bma220" },
51 { }
52};
53MODULE_DEVICE_TABLE(i2c, bma220_i2c_id);
54
55static struct i2c_driver bma220_i2c_driver = {
56 .driver = {
57 .name = "bma220_i2c",
58 .pm = pm_sleep_ptr(&bma220_pm_ops),
59 .of_match_table = bma220_i2c_match,
60 },
61 .probe = bma220_i2c_probe,
62 .id_table = bma220_i2c_id,
63};
64module_i2c_driver(bma220_i2c_driver);
65
66MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");
67MODULE_DESCRIPTION("Bosch triaxial acceleration sensor i2c driver");
68MODULE_LICENSE("GPL");
69MODULE_IMPORT_NS("IIO_BOSCH_BMA220");