cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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adxl345_spi.c (1997B)

      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);