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authorPeter Hutterer <peter.hutterer@who-t.net>2015-03-27 19:59:55 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2015-04-01 00:46:40 +0300
commit33096777519a66e632fed7f1e54e6480b4228827 (patch)
tree03a913176ce559976950cce1be11b595ed62dbae /Documentation
parent85734b1a5de80341d7d01cd29bbea9cf6f77094b (diff)
downloadlinux-33096777519a66e632fed7f1e54e6480b4228827.tar.xz
Input: define INPUT_PROP_ACCELEROMETER behavior
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/input/event-codes.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt
index c587a966413e..96705616f582 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.