bma220_i2c.c

 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");