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Date:   Thu, 28 Oct 2021 11:41:54 +0100
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 03/10] iio: document euler angles modifiers
Message-ID: <20211028114154.19e596fc@jic23-huawei>
In-Reply-To: <20211028101840.24632-4-andrea.merello@gmail.com>
References: <20210715141742.15072-1-andrea.merello@gmail.com>
        <20211028101840.24632-1-andrea.merello@gmail.com>
        <20211028101840.24632-4-andrea.merello@gmail.com>
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On Thu, 28 Oct 2021 12:18:33 +0200
Andrea Merello <andrea.merello@gmail.com> wrote:

> This patch introduces ABI documentation for new modifiers used for
> reporting rotations expressed as euler angles (i.e. yaw, pitch, roll).
> 
> Signed-off-by: Andrea Merello <andrea.merello@iit.it>
> ---
>  Documentation/ABI/testing/sysfs-bus-iio | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
> index 5147a00bf24a..f0adc2c817bd 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio
> +++ b/Documentation/ABI/testing/sysfs-bus-iio
> @@ -1965,3 +1965,11 @@ KernelVersion:	5.15
>  Contact:	linux-iio@vger.kernel.org
>  Description:
>  		Raw (unscaled) linear acceleration readings.
> +
> +What:		/sys/bus/iio/devices/iio:deviceX/in_rot_yaw_raw
> +What:		/sys/bus/iio/devices/iio:deviceX/in_rot_pitch_raw
> +What:		/sys/bus/iio/devices/iio:deviceX/in_rot_roll_raw
> +KernelVersion:	5.15
> +Contact:	linux-iio@vger.kernel.org
> +Description:
> +		Raw (unscaled) euler angles readings.
Any _raw entry should also include what the units are after application of
offset and scale.   Or you could just add this as more info to the in_rot_raw
block as an extra sentence explaining that they are euler angles.
That will lose the 'KernelVersion' information but honestly I'm not sure we
care that much about that.

Jonathan