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[2.229.210.222]) by smtp.gmail.com with ESMTPSA id i26-20020a50d75a000000b0041e84bb406fsm2704715edj.0.2022.04.15.06.00.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Apr 2022 06:00:36 -0700 (PDT) From: Andrea Merello To: jic23@kernel.org, mchehab+huawei@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Cc: lars@metafoo.de, robh+dt@kernel.org, andy.shevchenko@gmail.com, matt.ranostay@konsulko.com, ardeleanalex@gmail.com, jacopo@jmondi.org, Andrea Merello Subject: [v4 13/14] iio: imu: add BNO055 I2C driver Date: Fri, 15 Apr 2022 15:00:04 +0200 Message-Id: <20220415130005.85879-14-andrea.merello@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220415130005.85879-1-andrea.merello@gmail.com> References: <20220415130005.85879-1-andrea.merello@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrea Merello This path adds an I2C driver for communicating to a BNO055 IMU via I2C bus and it enables the BNO055 core driver to work in this scenario. Signed-off-by: Andrea Merello --- drivers/iio/imu/bno055/Kconfig | 11 ++++++ drivers/iio/imu/bno055/Makefile | 1 + drivers/iio/imu/bno055/bno055_i2c.c | 56 +++++++++++++++++++++++++++++ 3 files changed, 68 insertions(+) create mode 100644 drivers/iio/imu/bno055/bno055_i2c.c diff --git a/drivers/iio/imu/bno055/Kconfig b/drivers/iio/imu/bno055/Kconfig index 5a1a574c9770..38b461646c02 100644 --- a/drivers/iio/imu/bno055/Kconfig +++ b/drivers/iio/imu/bno055/Kconfig @@ -18,3 +18,14 @@ config BOSCH_BNO055_SERDEV_TRACING depends on EVENT_TRACING && BOSCH_BNO055_SERIAL help Enable this to enable trace events for the BNO055 serdev driver. + +config BOSCH_BNO055_I2C + tristate "Bosch BNO055 attached via I2C bus" + depends on I2C + select REGMAP_I2C + select BOSCH_BNO055_IIO + 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. diff --git a/drivers/iio/imu/bno055/Makefile b/drivers/iio/imu/bno055/Makefile index 20128b1a1afc..20f911aad94b 100644 --- a/drivers/iio/imu/bno055/Makefile +++ b/drivers/iio/imu/bno055/Makefile @@ -2,5 +2,6 @@ obj-$(CONFIG_BOSCH_BNO055_IIO) += bno055.o obj-$(CONFIG_BOSCH_BNO055_SERIAL) += bno055_ser.o +obj-$(CONFIG_BOSCH_BNO055_I2C) += bno055_i2c.o CFLAGS_bno055_ser.o := -I$(src) diff --git a/drivers/iio/imu/bno055/bno055_i2c.c b/drivers/iio/imu/bno055/bno055_i2c.c new file mode 100644 index 000000000000..d59bb4e661be --- /dev/null +++ b/drivers/iio/imu/bno055/bno055_i2c.c @@ -0,0 +1,56 @@ +// 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 + */ + +#include +#include +#include + +#include "bno055.h" + +#define BNO055_I2C_XFER_BURST_BREAK_THRESHOLD 3 /* FIXME */ + +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 = of_match_ptr(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"); -- 2.17.1