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73 lines
2.0 KiB
73 lines
2.0 KiB
// 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 <[email protected]> |
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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 <[email protected]>"); |
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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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