1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2021 Analog Devices, Inc.
4 * Author: Cosmin Tanislav <cosmin.tanislav@analog.com>
5 */
6
7#include <linux/i2c.h>
8#include <linux/mod_devicetable.h>
9#include <linux/module.h>
10#include <linux/regmap.h>
11
12#include "adxl367.h"
13
14#define ADXL367_I2C_FIFO_DATA	0x42
15
16struct adxl367_i2c_state {
17	struct regmap *regmap;
18};
19
20static bool adxl367_readable_noinc_reg(struct device *dev, unsigned int reg)
21{
22	return reg == ADXL367_I2C_FIFO_DATA;
23}
24
25static int adxl367_i2c_read_fifo(void *context, __be16 *fifo_buf,
26				 unsigned int fifo_entries)
27{
28	struct adxl367_i2c_state *st = context;
29
30	return regmap_noinc_read(st->regmap, ADXL367_I2C_FIFO_DATA, fifo_buf,
31				 fifo_entries * sizeof(*fifo_buf));
32}
33
34static const struct regmap_config adxl367_i2c_regmap_config = {
35	.reg_bits = 8,
36	.val_bits = 8,
37	.readable_noinc_reg = adxl367_readable_noinc_reg,
38};
39
40static const struct adxl367_ops adxl367_i2c_ops = {
41	.read_fifo = adxl367_i2c_read_fifo,
42};
43
44static int adxl367_i2c_probe(struct i2c_client *client)
45{
46	struct adxl367_i2c_state *st;
47	struct regmap *regmap;
48
49	st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
50	if (!st)
51		return -ENOMEM;
52
53	regmap = devm_regmap_init_i2c(client, &adxl367_i2c_regmap_config);
54	if (IS_ERR(regmap))
55		return PTR_ERR(regmap);
56
57	st->regmap = regmap;
58
59	return adxl367_probe(&client->dev, &adxl367_i2c_ops, st, regmap,
60			     client->irq);
61}
62
63static const struct i2c_device_id adxl367_i2c_id[] = {
64	{ "adxl367", 0 },
65	{ },
66};
67MODULE_DEVICE_TABLE(i2c, adxl367_i2c_id);
68
69static const struct of_device_id adxl367_of_match[] = {
70	{ .compatible = "adi,adxl367" },
71	{ },
72};
73MODULE_DEVICE_TABLE(of, adxl367_of_match);
74
75static struct i2c_driver adxl367_i2c_driver = {
76	.driver = {
77		.name = "adxl367_i2c",
78		.of_match_table = adxl367_of_match,
79	},
80	.probe = adxl367_i2c_probe,
81	.id_table = adxl367_i2c_id,
82};
83
84module_i2c_driver(adxl367_i2c_driver);
85
86MODULE_IMPORT_NS(IIO_ADXL367);
87MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>");
88MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer I2C driver");
89MODULE_LICENSE("GPL");
90