a7a1c60bc4
ADXL312 and ADXL314 are small, thin, low power, 3-axis accelerometers with high resolution (13-bit) measurement up to +/-12 g and +/- 200 g respectively. Implement support for ADXL312 and ADXL314 by extending the ADXL313 driver. Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL312.pdf Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL314.pdf Signed-off-by: George Mois <george.mois@analog.com> Link: https://lore.kernel.org/r/20220905132018.364900-2-george.mois@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* ADXL313 3-Axis Digital Accelerometer
|
|
*
|
|
* Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
|
|
*
|
|
* Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
|
|
*/
|
|
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/property.h>
|
|
|
|
#include "adxl313.h"
|
|
|
|
static const struct regmap_config adxl31x_spi_regmap_config[] = {
|
|
[ADXL312] = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.rd_table = &adxl312_readable_regs_table,
|
|
.wr_table = &adxl312_writable_regs_table,
|
|
.max_register = 0x39,
|
|
/* Setting bits 7 and 6 enables multiple-byte read */
|
|
.read_flag_mask = BIT(7) | BIT(6),
|
|
},
|
|
[ADXL313] = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.rd_table = &adxl313_readable_regs_table,
|
|
.wr_table = &adxl313_writable_regs_table,
|
|
.max_register = 0x39,
|
|
/* Setting bits 7 and 6 enables multiple-byte read */
|
|
.read_flag_mask = BIT(7) | BIT(6),
|
|
},
|
|
[ADXL314] = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.rd_table = &adxl314_readable_regs_table,
|
|
.wr_table = &adxl314_writable_regs_table,
|
|
.max_register = 0x39,
|
|
/* Setting bits 7 and 6 enables multiple-byte read */
|
|
.read_flag_mask = BIT(7) | BIT(6),
|
|
},
|
|
};
|
|
|
|
static int adxl313_spi_setup(struct device *dev, struct regmap *regmap)
|
|
{
|
|
struct spi_device *spi = container_of(dev, struct spi_device, dev);
|
|
int ret;
|
|
|
|
if (spi->mode & SPI_3WIRE) {
|
|
ret = regmap_write(regmap, ADXL313_REG_DATA_FORMAT,
|
|
ADXL313_SPI_3WIRE);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return regmap_update_bits(regmap, ADXL313_REG_POWER_CTL,
|
|
ADXL313_I2C_DISABLE, ADXL313_I2C_DISABLE);
|
|
}
|
|
|
|
static int adxl313_spi_probe(struct spi_device *spi)
|
|
{
|
|
const struct adxl313_chip_info *chip_data;
|
|
struct regmap *regmap;
|
|
int ret;
|
|
|
|
spi->mode |= SPI_MODE_3;
|
|
ret = spi_setup(spi);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Retrieves device specific data as a pointer to a
|
|
* adxl313_chip_info structure
|
|
*/
|
|
chip_data = device_get_match_data(&spi->dev);
|
|
if (!chip_data)
|
|
chip_data = (const struct adxl313_chip_info *)spi_get_device_id(spi)->driver_data;
|
|
|
|
regmap = devm_regmap_init_spi(spi,
|
|
&adxl31x_spi_regmap_config[chip_data->type]);
|
|
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
|
|
PTR_ERR(regmap));
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
return adxl313_core_probe(&spi->dev, regmap,
|
|
chip_data, &adxl313_spi_setup);
|
|
}
|
|
|
|
static const struct spi_device_id adxl313_spi_id[] = {
|
|
{ .name = "adxl312", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] },
|
|
{ .name = "adxl313", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL313] },
|
|
{ .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL314] },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(spi, adxl313_spi_id);
|
|
|
|
static const struct of_device_id adxl313_of_match[] = {
|
|
{ .compatible = "adi,adxl312", .data = &adxl31x_chip_info[ADXL312] },
|
|
{ .compatible = "adi,adxl313", .data = &adxl31x_chip_info[ADXL313] },
|
|
{ .compatible = "adi,adxl314", .data = &adxl31x_chip_info[ADXL314] },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, adxl313_of_match);
|
|
|
|
static struct spi_driver adxl313_spi_driver = {
|
|
.driver = {
|
|
.name = "adxl313_spi",
|
|
.of_match_table = adxl313_of_match,
|
|
},
|
|
.probe = adxl313_spi_probe,
|
|
.id_table = adxl313_spi_id,
|
|
};
|
|
|
|
module_spi_driver(adxl313_spi_driver);
|
|
|
|
MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
|
|
MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer SPI driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_IMPORT_NS(IIO_ADXL313);
|