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Input: define INPUT_PROP_ACCELEROMETER behavior

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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 <peter.hutterer@who-t.net>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Peter Hutterer 2015-03-27 09:59:55 -07:00 committed by Dmitry Torokhov
parent 85734b1a5d
commit 3309677751
1 changed files with 6 additions and 0 deletions
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6
Documentation/input/event-codes.txt
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@ -294,6 +294,12 @@ accordingly. This property does not affect kernel behavior.
The kernel does not provide button emulation for such devices but treats The kernel does not provide button emulation for such devices but treats
them as any other INPUT_PROP_BUTTONPAD device. 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: Guidelines:
========== ==========
The guidelines below ensure proper single-touch and multi-finger functionality. The guidelines below ensure proper single-touch and multi-finger functionality.