1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ADXL345 3-Axis Digital Accelerometer SPI driver
4 *
5 * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
6 */
7
8#include <linux/module.h>
9#include <linux/regmap.h>
10#include <linux/spi/spi.h>
11
12#include "adxl345.h"
13
14#define ADXL345_MAX_SPI_FREQ_HZ		5000000
15
16static const struct regmap_config adxl345_spi_regmap_config = {
17	.reg_bits = 8,
18	.val_bits = 8,
19	 /* Setting bits 7 and 6 enables multiple-byte read */
20	.read_flag_mask = BIT(7) | BIT(6),
21};
22
23static int adxl345_spi_probe(struct spi_device *spi)
24{
25	struct regmap *regmap;
26
27	/* Bail out if max_speed_hz exceeds 5 MHz */
28	if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ)
29		return dev_err_probe(&spi->dev, -EINVAL, "SPI CLK, %d Hz exceeds 5 MHz\n",
30				     spi->max_speed_hz);
31
32	regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config);
33	if (IS_ERR(regmap))
34		return dev_err_probe(&spi->dev, PTR_ERR(regmap), "Error initializing regmap\n");
35
36	return adxl345_core_probe(&spi->dev, regmap);
37}
38
39static const struct spi_device_id adxl345_spi_id[] = {
40	{ "adxl345", ADXL345 },
41	{ "adxl375", ADXL375 },
42	{ }
43};
44MODULE_DEVICE_TABLE(spi, adxl345_spi_id);
45
46static const struct of_device_id adxl345_of_match[] = {
47	{ .compatible = "adi,adxl345", .data = (const void *)ADXL345 },
48	{ .compatible = "adi,adxl375", .data = (const void *)ADXL375 },
49	{ }
50};
51MODULE_DEVICE_TABLE(of, adxl345_of_match);
52
53static const struct acpi_device_id adxl345_acpi_match[] = {
54	{ "ADS0345", ADXL345 },
55	{ }
56};
57MODULE_DEVICE_TABLE(acpi, adxl345_acpi_match);
58
59static struct spi_driver adxl345_spi_driver = {
60	.driver = {
61		.name	= "adxl345_spi",
62		.of_match_table = adxl345_of_match,
63		.acpi_match_table = adxl345_acpi_match,
64	},
65	.probe		= adxl345_spi_probe,
66	.id_table	= adxl345_spi_id,
67};
68module_spi_driver(adxl345_spi_driver);
69
70MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
71MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver");
72MODULE_LICENSE("GPL v2");
73MODULE_IMPORT_NS(IIO_ADXL345);
74