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[2.229.210.222]) by smtp.googlemail.com with ESMTPSA id mp9sm1175071ejc.48.2021.10.28.03.18.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Oct 2021 03:18:58 -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 , Andrea Merello Subject: [v2 10/10] iio: imu: add BNO055 I2C driver Date: Thu, 28 Oct 2021 12:18:40 +0200 Message-Id: <20211028101840.24632-11-andrea.merello@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211028101840.24632-1-andrea.merello@gmail.com> References: <20210715141742.15072-1-andrea.merello@gmail.com> <20211028101840.24632-1-andrea.merello@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org 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 Reported-by: kernel test robot Tested-by: Randy Dunlap Acked-by: Randy Dunlap Tested-by: Randy Dunlap Acked-by: Randy Dunlap --- drivers/iio/imu/bno055/Kconfig | 6 ++++ drivers/iio/imu/bno055/Makefile | 1 + drivers/iio/imu/bno055/bno055_i2c.c | 54 +++++++++++++++++++++++++++++ 3 files changed, 61 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 941e43f0368d..87200787d548 100644 --- a/drivers/iio/imu/bno055/Kconfig +++ b/drivers/iio/imu/bno055/Kconfig @@ -7,3 +7,9 @@ config BOSH_BNO055_SERIAL tristate "Bosh BNO055 attached via serial bus" depends on SERIAL_DEV_BUS select BOSH_BNO055_IIO + +config BOSH_BNO055_I2C + tristate "Bosh BNO055 attached via I2C bus" + depends on I2C + select REGMAP_I2C + select BOSH_BNO055_IIO diff --git a/drivers/iio/imu/bno055/Makefile b/drivers/iio/imu/bno055/Makefile index 7285ade2f4b9..eaf24018cb28 100644 --- a/drivers/iio/imu/bno055/Makefile +++ b/drivers/iio/imu/bno055/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_BOSH_BNO055_IIO) += bno055.o obj-$(CONFIG_BOSH_BNO055_SERIAL) += bno055_sl.o +obj-$(CONFIG_BOSH_BNO055_I2C) += bno055_i2c.o diff --git a/drivers/iio/imu/bno055/bno055_i2c.c b/drivers/iio/imu/bno055/bno055_i2c.c new file mode 100644 index 000000000000..eea0daa6a61d --- /dev/null +++ b/drivers/iio/imu/bno055/bno055_i2c.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * I2C interface for Bosh BNO055 IMU. + * This file implements I2C communication up to the register read/write + * level. + * + * Copyright (C) 2021 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, + const struct i2c_device_id *id) +{ + struct regmap *regmap = + devm_regmap_init_i2c(client, &bno055_regmap_config); + + if (IS_ERR(regmap)) { + dev_err(&client->dev, "Unable to init register map"); + return PTR_ERR(regmap); + } + + return bno055_probe(&client->dev, regmap, + BNO055_I2C_XFER_BURST_BREAK_THRESHOLD); + + return 0; +} + +static const struct i2c_device_id bno055_i2c_id[] = { + {"bno055", 0}, + { }, +}; +MODULE_DEVICE_TABLE(i2c, bno055_i2c_id); + +static struct i2c_driver bno055_driver = { + .driver = { + .name = "bno055-i2c", + }, + .probe = bno055_i2c_probe, + .id_table = bno055_i2c_id +}; +module_i2c_driver(bno055_driver); + +MODULE_AUTHOR("Andrea Merello"); +MODULE_DESCRIPTION("Bosch BNO055 I2C interface"); +MODULE_LICENSE("GPL v2");