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From: Jonathan Cameron <jic23@kernel.org>
To: Andrea Merello <andrea.merello@gmail.com>
Cc: mchehab+huawei@kernel.org, linux-iio@vger.kernel.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	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@iit.it>
Subject: Re: [v2 10/10] iio: imu: add BNO055 I2C driver
Date: Thu, 28 Oct 2021 12:10:01 +0100	[thread overview]
Message-ID: <20211028121001.73d8abbe@jic23-huawei> (raw)
In-Reply-To: <20211028101840.24632-11-andrea.merello@gmail.com>

On Thu, 28 Oct 2021 12:18:40 +0200
Andrea Merello <andrea.merello@gmail.com> wrote:

> 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 <andrea.merello@iit.it>
Hi Andrea,

A few minor things inline.

Jonathan

> ---
>  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.

Not really. It just uses regmap, so I'd drop this comment.

> + *
> + * Copyright (C) 2021 Istituto Italiano di Tecnologia
> + * Electronic Design Laboratory
> + * Written by Andrea Merello <andrea.merello@iit.it>
> + */
> +
> +#include <linux/i2c.h>

Why?  I'm not seeing an i2c specific calls in here.

> +#include <linux/regmap.h>
> +#include <linux/module.h>

mod_devicetable.h for struct i2c_device_id
 
> +
> +#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},
> +	{ },

It's at terminator, so don't put a comma as we'll never add entries after this.

> +};
> +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");


  reply	other threads:[~2021-10-28 11:05 UTC|newest]

Thread overview: 88+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-15 14:17 [PATCH 0/4] Add support for Bosch BNO055 IMU Andrea Merello
2021-07-15 14:17 ` [PATCH 1/4] iio: add modifiers for linear acceleration Andrea Merello
2021-07-17 14:32   ` Jonathan Cameron
2021-07-15 14:17 ` [PATCH 2/4] iio: imu: add Bosch Sensortec BNO055 core driver Andrea Merello
2021-07-15 16:49   ` Andy Shevchenko
2021-07-16  9:19     ` Andrea Merello
2021-07-16 12:39       ` Andy Shevchenko
2021-07-19  7:12         ` Andrea Merello
2021-07-19 10:33         ` Andrea Merello
2021-07-19  9:02     ` Andrea Merello
2021-07-19 11:48       ` Andy Shevchenko
2021-07-19 13:13         ` Andrea Merello
2021-07-16  7:24   ` Alexandru Ardelean
2021-07-16  9:49     ` Andrea Merello
2021-07-17 15:32   ` Jonathan Cameron
2021-07-19  8:30     ` Andrea Merello
2021-07-24 17:08       ` Jonathan Cameron
2021-07-26 14:36         ` Andrea Merello
2021-07-31 18:01           ` Jonathan Cameron
2021-08-04 10:06             ` Andrea Merello
2021-08-04 16:50               ` Jonathan Cameron
2021-08-04 19:27                 ` Andy Shevchenko
2021-07-15 14:17 ` [PATCH 3/4] dt-bindings: iio: imu: add bosch BNO055 serdev driver bindings Andrea Merello
2021-07-17 15:39   ` Jonathan Cameron
2021-07-19  8:44     ` Andrea Merello
2021-07-15 14:17 ` [PATCH 4/4] iio: imu: add BNO055 serdev driver Andrea Merello
2021-07-15 17:08   ` kernel test robot
2021-07-15 18:14   ` kernel test robot
2021-07-17 15:50   ` Jonathan Cameron
2021-07-19  8:49     ` Andrea Merello
2021-07-19 11:55       ` Andy Shevchenko
2021-07-19 12:59         ` Andrea Merello
2021-07-19 14:15           ` Andy Shevchenko
2021-07-19 15:07             ` Andrea Merello
2021-10-28 10:18 ` [v2 00/10] Add support for Bosch BNO055 IMU Andrea Merello
2021-10-28 10:18   ` [v2 01/10] utils_macro: introduce find_closest_unsorted() Andrea Merello
2021-10-28 10:25     ` Andy Shevchenko
2021-11-08 11:05       ` Andrea Merello
2021-10-28 10:18   ` [v2 02/10] iio: document linear acceleration modifiers Andrea Merello
2021-10-28 10:31     ` Andy Shevchenko
2021-11-09  7:48       ` Andrea Merello
2021-10-28 10:40     ` Jonathan Cameron
2021-11-09  8:00       ` Andrea Merello
2021-11-09 17:00         ` Jonathan Cameron
2021-10-28 10:18   ` [v2 03/10] iio: document euler angles modifiers Andrea Merello
2021-10-28 10:33     ` Andy Shevchenko
2021-10-28 10:41     ` Jonathan Cameron
2021-11-09  8:15       ` Andrea Merello
2021-11-09 17:03         ` Jonathan Cameron
2021-10-28 10:18   ` [v2 04/10] iio: add modifiers for linear acceleration Andrea Merello
2021-10-28 10:45     ` Jonathan Cameron
2021-11-09  9:58       ` Andrea Merello
2021-11-09 17:05         ` Jonathan Cameron
2021-10-28 10:18   ` [v2 05/10] iio: add modifers for pitch, yaw, roll Andrea Merello
2021-10-28 10:47     ` Jonathan Cameron
2021-10-28 10:18   ` [v2 06/10] iio: document bno055 private sysfs attributes Andrea Merello
2021-10-28 11:04     ` Jonathan Cameron
2021-11-09 10:22       ` Andrea Merello
2021-11-14 16:20         ` Jonathan Cameron
2022-01-04 11:42           ` Andrea Merello
2022-01-15 15:27             ` Jonathan Cameron
2022-01-17  9:37               ` Andrea Merello
2021-10-28 10:18   ` [v2 07/10] iio: imu: add Bosch Sensortec BNO055 core driver Andrea Merello
2021-10-28 13:31     ` Jonathan Cameron
2021-11-09 11:52       ` Andrea Merello
2021-11-14 16:33         ` Jonathan Cameron
2021-10-28 10:18   ` [v2 08/10] dt-bindings: iio: imu: add documentation for Bosch BNO055 bindings Andrea Merello
2021-10-28 12:25     ` Rob Herring
2021-10-28 10:18   ` [v2 09/10] iio: imu: add BNO055 serdev driver Andrea Merello
2021-10-28 12:31     ` Jonathan Cameron
2021-11-09 15:33       ` Andrea Merello
2021-11-14 16:37         ` Jonathan Cameron
2021-10-29  7:09     ` kernel test robot
2021-10-29 12:59     ` kernel test robot
2021-10-28 10:18   ` [v2 10/10] iio: imu: add BNO055 I2C driver Andrea Merello
2021-10-28 11:10     ` Jonathan Cameron [this message]
2021-11-11 10:12       ` Andrea Merello
2021-11-14 16:38         ` Jonathan Cameron
2021-10-28 22:04     ` Randy Dunlap
2021-11-09 11:56       ` Andrea Merello
2021-11-09 15:47         ` Randy Dunlap
2021-11-09 18:21           ` Joe Perches
2021-11-09 19:11             ` Randy Dunlap
2021-11-09 20:46               ` Joe Perches
2021-11-09 21:20                 ` Randy Dunlap
2021-10-29 13:30     ` kernel test robot
2021-10-28 10:35   ` [v2 00/10] Add support for Bosch BNO055 IMU Jonathan Cameron
2021-10-28 10:33     ` Andy Shevchenko

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