Commit 465c811f authored by Dan Robertson's avatar Dan Robertson Committed by Jonathan Cameron

iio: accel: Add driver for the BMA400

Add a IIO driver for the Bosch BMA400 3-axes ultra-low power accelerometer.
The driver supports reading from the acceleration and temperature
registers. The driver also supports reading and configuring the output data
rate, oversampling ratio, and scale.
Signed-off-by: default avatarDan Robertson <dan@dlrobertson.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 5264c5f4
...@@ -3064,6 +3064,13 @@ S: Supported ...@@ -3064,6 +3064,13 @@ S: Supported
F: drivers/net/bonding/ F: drivers/net/bonding/
F: include/uapi/linux/if_bonding.h F: include/uapi/linux/if_bonding.h
BOSCH SENSORTEC BMA400 ACCELEROMETER IIO DRIVER
M: Dan Robertson <dan@dlrobertson.com>
L: linux-iio@vger.kernel.org
S: Maintained
F: drivers/iio/accel/bma400*
F: Documentation/devicetree/bindings/iio/accel/bosch,bma400.yaml
BPF (Safe dynamic programs and tools) BPF (Safe dynamic programs and tools)
M: Alexei Starovoitov <ast@kernel.org> M: Alexei Starovoitov <ast@kernel.org>
M: Daniel Borkmann <daniel@iogearbox.net> M: Daniel Borkmann <daniel@iogearbox.net>
......
...@@ -112,6 +112,22 @@ config BMA220 ...@@ -112,6 +112,22 @@ config BMA220
To compile this driver as a module, choose M here: the To compile this driver as a module, choose M here: the
module will be called bma220_spi. module will be called bma220_spi.
config BMA400
tristate "Bosch BMA400 3-Axis Accelerometer Driver"
select REGMAP
select BMA400_I2C if I2C
help
Say Y here if you want to build a driver for the Bosch BMA400
triaxial acceleration sensor.
To compile this driver as a module, choose M here: the
module will be called bma400_core and you will also get
bma400_i2c if I2C is enabled.
config BMA400_I2C
tristate
depends on BMA400
config BMC150_ACCEL config BMC150_ACCEL
tristate "Bosch BMC150 Accelerometer Driver" tristate "Bosch BMC150 Accelerometer Driver"
select IIO_BUFFER select IIO_BUFFER
......
...@@ -14,6 +14,8 @@ obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o ...@@ -14,6 +14,8 @@ obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o
obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o
obj-$(CONFIG_BMA180) += bma180.o obj-$(CONFIG_BMA180) += bma180.o
obj-$(CONFIG_BMA220) += bma220_spi.o obj-$(CONFIG_BMA220) += bma220_spi.o
obj-$(CONFIG_BMA400) += bma400_core.o
obj-$(CONFIG_BMA400_I2C) += bma400_i2c.o
obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o
obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o
obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o
......
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Register constants and other forward declarations needed by the bma400
* sources.
*
* Copyright 2019 Dan Robertson <dan@dlrobertson.com>
*/
#ifndef _BMA400_H_
#define _BMA400_H_
#include <linux/bits.h>
#include <linux/regmap.h>
/*
* Read-Only Registers
*/
/* Status and ID registers */
#define BMA400_CHIP_ID_REG 0x00
#define BMA400_ERR_REG 0x02
#define BMA400_STATUS_REG 0x03
/* Acceleration registers */
#define BMA400_X_AXIS_LSB_REG 0x04
#define BMA400_X_AXIS_MSB_REG 0x05
#define BMA400_Y_AXIS_LSB_REG 0x06
#define BMA400_Y_AXIS_MSB_REG 0x07
#define BMA400_Z_AXIS_LSB_REG 0x08
#define BMA400_Z_AXIS_MSB_REG 0x09
/* Sensor time registers */
#define BMA400_SENSOR_TIME0 0x0a
#define BMA400_SENSOR_TIME1 0x0b
#define BMA400_SENSOR_TIME2 0x0c
/* Event and interrupt registers */
#define BMA400_EVENT_REG 0x0d
#define BMA400_INT_STAT0_REG 0x0e
#define BMA400_INT_STAT1_REG 0x0f
#define BMA400_INT_STAT2_REG 0x10
/* Temperature register */
#define BMA400_TEMP_DATA_REG 0x11
/* FIFO length and data registers */
#define BMA400_FIFO_LENGTH0_REG 0x12
#define BMA400_FIFO_LENGTH1_REG 0x13
#define BMA400_FIFO_DATA_REG 0x14
/* Step count registers */
#define BMA400_STEP_CNT0_REG 0x15
#define BMA400_STEP_CNT1_REG 0x16
#define BMA400_STEP_CNT3_REG 0x17
#define BMA400_STEP_STAT_REG 0x18
/*
* Read-write configuration registers
*/
#define BMA400_ACC_CONFIG0_REG 0x19
#define BMA400_ACC_CONFIG1_REG 0x1a
#define BMA400_ACC_CONFIG2_REG 0x1b
#define BMA400_CMD_REG 0x7e
/* Chip ID of BMA 400 devices found in the chip ID register. */
#define BMA400_ID_REG_VAL 0x90
#define BMA400_LP_OSR_SHIFT 5
#define BMA400_NP_OSR_SHIFT 4
#define BMA400_SCALE_SHIFT 6
#define BMA400_TWO_BITS_MASK GENMASK(1, 0)
#define BMA400_LP_OSR_MASK GENMASK(6, 5)
#define BMA400_NP_OSR_MASK GENMASK(5, 4)
#define BMA400_ACC_ODR_MASK GENMASK(3, 0)
#define BMA400_ACC_SCALE_MASK GENMASK(7, 6)
#define BMA400_ACC_ODR_MIN_RAW 0x05
#define BMA400_ACC_ODR_LP_RAW 0x06
#define BMA400_ACC_ODR_MAX_RAW 0x0b
#define BMA400_ACC_ODR_MAX_HZ 800
#define BMA400_ACC_ODR_MIN_WHOLE_HZ 25
#define BMA400_ACC_ODR_MIN_HZ 12
#define BMA400_SCALE_MIN 38357
#define BMA400_SCALE_MAX 306864
extern const struct regmap_config bma400_regmap_config;
int bma400_probe(struct device *dev, struct regmap *regmap, const char *name);
int bma400_remove(struct device *dev);
#endif
This diff is collapsed.
// SPDX-License-Identifier: GPL-2.0-only
/*
* I2C IIO driver for Bosch BMA400 triaxial acceleration sensor.
*
* Copyright 2019 Dan Robertson <dan@dlrobertson.com>
*
* I2C address is either 0x14 or 0x15 depending on SDO
*/
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include "bma400.h"
static int bma400_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct regmap *regmap;
regmap = devm_regmap_init_i2c(client, &bma400_regmap_config);
if (IS_ERR(regmap)) {
dev_err(&client->dev, "failed to create regmap\n");
return PTR_ERR(regmap);
}
return bma400_probe(&client->dev, regmap, id->name);
}
static int bma400_i2c_remove(struct i2c_client *client)
{
return bma400_remove(&client->dev);
}
static const struct i2c_device_id bma400_i2c_ids[] = {
{ "bma400", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, bma400_i2c_ids);
static const struct of_device_id bma400_of_i2c_match[] = {
{ .compatible = "bosch,bma400" },
{ }
};
MODULE_DEVICE_TABLE(of, bma400_of_i2c_match);
static struct i2c_driver bma400_i2c_driver = {
.driver = {
.name = "bma400",
.of_match_table = bma400_of_i2c_match,
},
.probe = bma400_i2c_probe,
.remove = bma400_i2c_remove,
.id_table = bma400_i2c_ids,
};
module_i2c_driver(bma400_i2c_driver);
MODULE_AUTHOR("Dan Robertson <dan@dlrobertson.com>");
MODULE_DESCRIPTION("Bosch BMA400 triaxial acceleration sensor (I2C)");
MODULE_LICENSE("GPL");
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