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iio: imu: add BNO055 I2C driver 

Add an I2C driver for communicating to a BNO055 IMU via I2C bus and enable
the BNO055 core driver to work in this scenario.

Signed-off-by: Andrea Merello <andrea.merello@iit.it>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220907132205.28021-14-andrea.merello@iit.it
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andrea Merello 2022-09-07 15:22:04 +02:00 committed by Jonathan Cameron
parent 2eef5a9cc6
commit 50fe984f37
3 changed files with 70 additions and 0 deletions
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11
drivers/iio/imu/bno055/Kconfig
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@ -12,3 +12,14 @@ config BOSCH_BNO055_SERIAL
This driver can also be built as a module. If so, the module will be
called bno055_sl.
config BOSCH_BNO055_I2C
tristate "Bosch BNO055 attached via I2C bus"
depends on I2C
select REGMAP_I2C
select BOSCH_BNO055
help
Enable this to support Bosch BNO055 IMUs attached via I2C bus.
This driver can also be built as a module. If so, the module will be
called bno055_i2c.

2
drivers/iio/imu/bno055/Makefile
View File

@ -6,3 +6,5 @@ bno055_ser-y := bno055_ser_core.o
# define_trace.h needs to know how to find our header
CFLAGS_bno055_ser_trace.o := -I$(src)
bno055_ser-$(CONFIG_TRACING) += bno055_ser_trace.o
obj-$(CONFIG_BOSCH_BNO055_I2C) += bno055_i2c.o

57
drivers/iio/imu/bno055/bno055_i2c.c Normal file
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@ -0,0 +1,57 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Support for I2C-interfaced Bosch BNO055 IMU.
*
* Copyright (C) 2021-2022 Istituto Italiano di Tecnologia
* Electronic Design Laboratory
* Written by Andrea Merello <andrea.merello@iit.it>
*/
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include "bno055.h"
#define BNO055_I2C_XFER_BURST_BREAK_THRESHOLD 3
static int bno055_i2c_probe(struct i2c_client *client)
{
struct regmap *regmap;
regmap = devm_regmap_init_i2c(client, &bno055_regmap_config);
if (IS_ERR(regmap))
return dev_err_probe(&client->dev, PTR_ERR(regmap),
"Unable to init register map");
return bno055_probe(&client->dev, regmap,
BNO055_I2C_XFER_BURST_BREAK_THRESHOLD, true);
}
static const struct i2c_device_id bno055_i2c_id[] = {
{"bno055", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, bno055_i2c_id);
static const struct of_device_id __maybe_unused bno055_i2c_of_match[] = {
{ .compatible = "bosch,bno055" },
{ }
};
MODULE_DEVICE_TABLE(of, bno055_i2c_of_match);
static struct i2c_driver bno055_driver = {
.driver = {
.name = "bno055-i2c",
.of_match_table = bno055_i2c_of_match,
},
.probe_new = bno055_i2c_probe,
.id_table = bno055_i2c_id,
};
module_i2c_driver(bno055_driver);
MODULE_AUTHOR("Andrea Merello");
MODULE_DESCRIPTION("Bosch BNO055 I2C interface");
MODULE_IMPORT_NS(IIO_BNO055);
MODULE_LICENSE("GPL");