On Fri, 27 Mar 2015, Peter Hutterer wrote:
> Spell out what this property means to userspace. If the property is set, all
> directional axes must be accelerometer axes, any other axes are left as-is.
> This allows an accelerometer device to e.g. have an ABS_WHEEL.
>
> It is not permitted to mix normal directional axes and accelerometer axes on
> the same device node.
>
> Signed-off-by: Peter Hutterer <[email protected]>
> ---
> I think this is the most sensible definition of what to expect when this
> property is set on a device.
First, I am quilty here. I've let INPUT_PROP_ACCELEROMETER slip through my
tree without Dmitry's Ack, which is what I normally require for everything
touching input.h. Mea culpa maxima, I missed it, sorry for that.
This makes sense to me though. So
Acked-by: Jiri Kosina <[email protected]>
but let's see what Dmitry has to say.
Good thing is that this went only into 4.0-rc1, so if the whole
INPUT_PROP_ACCELEROMETER turns out to be absolute no-go for some reason,
we can still revert it.
Thanks, and sorry again.
> Documentation/input/event-codes.txt | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/input/event-codes.txt
> b/Documentation/input/event-codes.txt
> index 9d13600..1756b97 100644
> --- a/Documentation/input/event-codes.txt
> +++ b/Documentation/input/event-codes.txt
> @@ -294,6 +294,12 @@ accordingly. This property does not affect kernel
> behavior.
> The kernel does not provide button emulation for such devices but treats
> them as any other INPUT_PROP_BUTTONPAD device.
>
> +INPUT_PROP_ACCELEROMETER
> +-------------------------
> +Directional axes on this device (absolute and/or relative x, y, z) represent
> +accelerometer data. All other axes retain their meaning. A device must not
> mix
> +regular directional axes and accelerometer axes on the same event node.
> +
> Guidelines:
> ==========
> The guidelines below ensure proper single-touch and multi-finger
> functionality.
> --
> 2.3.3
>
--
Jiri Kosina
SUSE Labs
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