74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ADXL345 3-Axis Digital Accelerometer SPI driver
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*
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* Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include "adxl345.h"
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#define ADXL345_MAX_SPI_FREQ_HZ 5000000
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static const struct regmap_config adxl345_spi_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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/* Setting bits 7 and 6 enables multiple-byte read */
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.read_flag_mask = BIT(7) | BIT(6),
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};
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static int adxl345_spi_probe(struct spi_device *spi)
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{
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struct regmap *regmap;
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/* Bail out if max_speed_hz exceeds 5 MHz */
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if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ)
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return dev_err_probe(&spi->dev, -EINVAL, "SPI CLK, %d Hz exceeds 5 MHz\n",
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spi->max_speed_hz);
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regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config);
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if (IS_ERR(regmap))
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return dev_err_probe(&spi->dev, PTR_ERR(regmap), "Error initializing regmap\n");
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return adxl345_core_probe(&spi->dev, regmap);
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}
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static const struct spi_device_id adxl345_spi_id[] = {
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{ "adxl345", ADXL345 },
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{ "adxl375", ADXL375 },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, adxl345_spi_id);
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static const struct of_device_id adxl345_of_match[] = {
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{ .compatible = "adi,adxl345", .data = (const void *)ADXL345 },
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{ .compatible = "adi,adxl375", .data = (const void *)ADXL375 },
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{ }
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};
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MODULE_DEVICE_TABLE(of, adxl345_of_match);
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static const struct acpi_device_id adxl345_acpi_match[] = {
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{ "ADS0345", ADXL345 },
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{ }
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};
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MODULE_DEVICE_TABLE(acpi, adxl345_acpi_match);
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static struct spi_driver adxl345_spi_driver = {
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.driver = {
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.name = "adxl345_spi",
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.of_match_table = adxl345_of_match,
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.acpi_match_table = adxl345_acpi_match,
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},
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.probe = adxl345_spi_probe,
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.id_table = adxl345_spi_id,
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};
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module_spi_driver(adxl345_spi_driver);
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MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
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MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver");
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MODULE_LICENSE("GPL v2");
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MODULE_IMPORT_NS(IIO_ADXL345);
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