adxl355_spi.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * ADXL355 3-Axis Digital Accelerometer SPI driver
 4 *
 5 * Copyright (c) 2021 Puranjay Mohan <puranjay12@gmail.com>
 6 */
 7
 8#include <linux/module.h>
 9#include <linux/mod_devicetable.h>
10#include <linux/regmap.h>
11#include <linux/spi/spi.h>
12#include <linux/property.h>
13
14#include "adxl355.h"
15
16static const struct regmap_config adxl355_spi_regmap_config = {
17	.reg_bits = 7,
18	.pad_bits = 1,
19	.val_bits = 8,
20	.read_flag_mask = BIT(0),
21	.max_register = 0x2F,
22	.rd_table = &adxl355_readable_regs_tbl,
23	.wr_table = &adxl355_writeable_regs_tbl,
24};
25
26static int adxl355_spi_probe(struct spi_device *spi)
27{
28	const struct adxl355_chip_info *chip_data;
29	struct regmap *regmap;
30
31	chip_data = spi_get_device_match_data(spi);
32	if (!chip_data)
33		return -EINVAL;
34
35	regmap = devm_regmap_init_spi(spi, &adxl355_spi_regmap_config);
36	if (IS_ERR(regmap)) {
37		dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
38			PTR_ERR(regmap));
39
40		return PTR_ERR(regmap);
41	}
42
43	return adxl355_core_probe(&spi->dev, regmap, chip_data);
44}
45
46static const struct spi_device_id adxl355_spi_id[] = {
47	{ "adxl355", (kernel_ulong_t)&adxl35x_chip_info[ADXL355] },
48	{ "adxl359", (kernel_ulong_t)&adxl35x_chip_info[ADXL359] },
49	{ }
50};
51MODULE_DEVICE_TABLE(spi, adxl355_spi_id);
52
53static const struct of_device_id adxl355_of_match[] = {
54	{ .compatible = "adi,adxl355", .data = &adxl35x_chip_info[ADXL355] },
55	{ .compatible = "adi,adxl359", .data = &adxl35x_chip_info[ADXL359] },
56	{ }
57};
58MODULE_DEVICE_TABLE(of, adxl355_of_match);
59
60static struct spi_driver adxl355_spi_driver = {
61	.driver = {
62		.name	= "adxl355_spi",
63		.of_match_table = adxl355_of_match,
64	},
65	.probe		= adxl355_spi_probe,
66	.id_table	= adxl355_spi_id,
67};
68module_spi_driver(adxl355_spi_driver);
69
70MODULE_AUTHOR("Puranjay Mohan <puranjay12@gmail.com>");
71MODULE_DESCRIPTION("ADXL355 3-Axis Digital Accelerometer SPI driver");
72MODULE_LICENSE("GPL v2");
73MODULE_IMPORT_NS("IIO_ADXL355");