Commit c19ae6be authored by Mike Looijmans's avatar Mike Looijmans Committed by Jonathan Cameron

iio: accel: Add support for the Bosch-Sensortec BMI088

The BMI088 is a combined module with both accelerometer and gyroscope.
This adds the accelerometer driver support for the SPI interface.
The gyroscope part is already supported by the BMG160 driver.
Signed-off-by: default avatarMike Looijmans <mike.looijmans@topic.nl>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210125150732.23873-2-mike.looijmans@topic.nlSigned-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 14aae601
......@@ -157,6 +157,24 @@ config BMC150_ACCEL_SPI
tristate
select REGMAP_SPI
config BMI088_ACCEL
tristate "Bosch BMI088 Accelerometer Driver"
depends on SPI
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
select REGMAP
select BMI088_ACCEL_SPI
help
Say yes here to build support for the Bosch BMI088 accelerometer.
This is a combo module with both accelerometer and gyroscope. This
driver only implements the accelerometer part, which has its own
address and register map. BMG160 provides the gyroscope driver.
config BMI088_ACCEL_SPI
tristate
select REGMAP_SPI
config DA280
tristate "MiraMEMS DA280 3-axis 14-bit digital accelerometer driver"
depends on I2C
......
......@@ -20,6 +20,8 @@ obj-$(CONFIG_BMA400_SPI) += bma400_spi.o
obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o
obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o
obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o
obj-$(CONFIG_BMI088_ACCEL) += bmi088-accel-core.o
obj-$(CONFIG_BMI088_ACCEL_SPI) += bmi088-accel-spi.o
obj-$(CONFIG_DA280) += da280.o
obj-$(CONFIG_DA311) += da311.o
obj-$(CONFIG_DMARD06) += dmard06.o
......
This diff is collapsed.
// SPDX-License-Identifier: GPL-2.0
/*
* 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
* - BMI088
*
* Copyright (c) 2018-2020, Topic Embedded Products
*/
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include "bmi088-accel.h"
static int bmi088_regmap_spi_write(void *context, const void *data, size_t count)
{
struct spi_device *spi = context;
/* Write register is same as generic SPI */
return spi_write(spi, data, count);
}
static int bmi088_regmap_spi_read(void *context, const void *reg,
size_t reg_size, void *val, size_t val_size)
{
struct spi_device *spi = context;
u8 addr[2];
addr[0] = *(u8 *)reg;
addr[0] |= BIT(7); /* Set RW = '1' */
addr[1] = 0; /* Read requires a dummy byte transfer */
return spi_write_then_read(spi, addr, sizeof(addr), val, val_size);
}
static struct regmap_bus bmi088_regmap_bus = {
.write = bmi088_regmap_spi_write,
.read = bmi088_regmap_spi_read,
};
static int bmi088_accel_probe(struct spi_device *spi)
{
struct regmap *regmap;
const struct spi_device_id *id = spi_get_device_id(spi);
regmap = devm_regmap_init(&spi->dev, &bmi088_regmap_bus,
spi, &bmi088_regmap_conf);
if (IS_ERR(regmap)) {
dev_err(&spi->dev, "Failed to initialize spi regmap\n");
return PTR_ERR(regmap);
}
return bmi088_accel_core_probe(&spi->dev, regmap, spi->irq, id->name,
true);
}
static int bmi088_accel_remove(struct spi_device *spi)
{
return bmi088_accel_core_remove(&spi->dev);
}
static const struct spi_device_id bmi088_accel_id[] = {
{"bmi088-accel", },
{}
};
MODULE_DEVICE_TABLE(spi, bmi088_accel_id);
static struct spi_driver bmi088_accel_driver = {
.driver = {
.name = "bmi088_accel_spi",
.pm = &bmi088_accel_pm_ops,
},
.probe = bmi088_accel_probe,
.remove = bmi088_accel_remove,
.id_table = bmi088_accel_id,
};
module_spi_driver(bmi088_accel_driver);
MODULE_AUTHOR("Niek van Agt <niek.van.agt@topicproducts.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("BMI088 accelerometer driver (SPI)");
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BMI088_ACCEL_H
#define BMI088_ACCEL_H
#include <linux/pm.h>
#include <linux/regmap.h>
#include <linux/types.h>
struct device;
extern const struct regmap_config bmi088_regmap_conf;
extern const struct dev_pm_ops bmi088_accel_pm_ops;
int bmi088_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
const char *name, bool block_supported);
int bmi088_accel_core_remove(struct device *dev);
#endif /* BMI088_ACCEL_H */
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