From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- drivers/iio/accel/adxl345_spi.c | 83 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 drivers/iio/accel/adxl345_spi.c (limited to 'drivers/iio/accel/adxl345_spi.c') diff --git a/drivers/iio/accel/adxl345_spi.c b/drivers/iio/accel/adxl345_spi.c new file mode 100644 index 000000000..67b7c66a8 --- /dev/null +++ b/drivers/iio/accel/adxl345_spi.c @@ -0,0 +1,83 @@ +/* + * ADXL345 3-Axis Digital Accelerometer SPI driver + * + * Copyright (c) 2017 Eva Rachel Retuya + * + * This file is subject to the terms and conditions of version 2 of + * the GNU General Public License. See the file COPYING in the main + * directory of this archive for more details. + */ + +#include +#include +#include + +#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 int adxl345_spi_remove(struct spi_device *spi) +{ + return adxl345_core_remove(&spi->dev); +} + +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, + .remove = adxl345_spi_remove, + .id_table = adxl345_spi_id, +}; + +module_spi_driver(adxl345_spi_driver); + +MODULE_AUTHOR("Eva Rachel Retuya "); +MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3