mirror of https://gitee.com/openkylin/linux.git
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
|
|
* ADXL345 3-Axis Digital Accelerometer SPI driver
|
|
*
|
|
* Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
|
|
*
|
|
* 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 <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->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", 0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(spi, adxl345_spi_id);
|
|
|
|
static const struct of_device_id adxl345_of_match[] = {
|
|
{ .compatible = "adi,adxl345" },
|
|
{ },
|
|
};
|
|
|
|
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 <eraretuya@gmail.com>");
|
|
MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver");
|
|
MODULE_LICENSE("GPL v2");
|