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// 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);
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