1 // SPDX-License-Identifier: GPL-2.0-only
3 * ADXL345 3-Axis Digital Accelerometer SPI driver
5 * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
8 #include <linux/module.h>
9 #include <linux/regmap.h>
10 #include <linux/spi/spi.h>
14 #define ADXL345_MAX_SPI_FREQ_HZ 5000000
16 static const struct regmap_config adxl345_spi_regmap_config = {
19 /* Setting bits 7 and 6 enables multiple-byte read */
20 .read_flag_mask = BIT(7) | BIT(6),
23 static int adxl345_spi_probe(struct spi_device *spi)
25 const struct spi_device_id *id = spi_get_device_id(spi);
26 struct regmap *regmap;
28 /* Bail out if max_speed_hz exceeds 5 MHz */
29 if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ) {
30 dev_err(&spi->dev, "SPI CLK, %d Hz exceeds 5 MHz\n",
35 regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config);
37 dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
39 return PTR_ERR(regmap);
42 return adxl345_core_probe(&spi->dev, regmap, id->driver_data, id->name);
45 static const struct spi_device_id adxl345_spi_id[] = {
46 { "adxl345", ADXL345 },
47 { "adxl375", ADXL375 },
51 MODULE_DEVICE_TABLE(spi, adxl345_spi_id);
53 static const struct of_device_id adxl345_of_match[] = {
54 { .compatible = "adi,adxl345" },
55 { .compatible = "adi,adxl375" },
59 MODULE_DEVICE_TABLE(of, adxl345_of_match);
61 static struct spi_driver adxl345_spi_driver = {
63 .name = "adxl345_spi",
64 .of_match_table = adxl345_of_match,
66 .probe = adxl345_spi_probe,
67 .id_table = adxl345_spi_id,
70 module_spi_driver(adxl345_spi_driver);
72 MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
73 MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver");
74 MODULE_LICENSE("GPL v2");