// SPDX-License-Identifier: GPL-2.0-only /* * ADXL345 3-Axis Digital Accelerometer SPI driver * * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com> */ #include <linux/module.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include "adxl345.h" #define ADXL345_MAX_SPI_FREQ_HZ 5000000 static const struct regmap_config adxl345_spi_regmap_config = { .reg_bits = 8, .val_bits = 8, /* Setting bits 7 and 6 enables multiple-byte read */ .read_flag_mask = BIT(7) | BIT(6), }; static int adxl345_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); struct regmap *regmap; /* Bail out if max_speed_hz exceeds 5 MHz */ if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ) { dev_err(&spi->dev, "SPI CLK, %d Hz exceeds 5 MHz\n", spi->max_speed_hz); return -EINVAL; } regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config); if (IS_ERR(regmap)) { dev_err(&spi->dev, "Error initializing spi regmap: %ld\n", PTR_ERR(regmap)); return PTR_ERR(regmap); } return adxl345_core_probe(&spi->dev, regmap, id->driver_data, id->name); } static const struct spi_device_id adxl345_spi_id[] = { { "adxl345", ADXL345 }, { "adxl375", ADXL375 }, { } }; MODULE_DEVICE_TABLE(spi, adxl345_spi_id); static const struct of_device_id adxl345_of_match[] = { { .compatible = "adi,adxl345" }, { .compatible = "adi,adxl375" }, { }, }; MODULE_DEVICE_TABLE(of, adxl345_of_match); static struct spi_driver adxl345_spi_driver = { .driver = { .name = "adxl345_spi", .of_match_table = adxl345_of_match, }, .probe = adxl345_spi_probe, .id_table = adxl345_spi_id, }; module_spi_driver(adxl345_spi_driver); MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>"); MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver"); MODULE_LICENSE("GPL v2");