Commit 50fe984f authored by Andrea Merello's avatar Andrea Merello Committed by Jonathan Cameron
Browse files

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: default avatarAndrea Merello <andrea.merello@iit.it>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220907132205.28021-14-andrea.merello@iit.it


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 2eef5a9c

drivers/iio/imu/bno055/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -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.

drivers/iio/imu/bno055/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -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

drivers/iio/imu/bno055/bno055_i2c.c

0 → 100644
+57 −0
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// 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");