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Input: clarify we want BTN_TOOL_<name> on proximity

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This explicitly states behavior we already use for some touchpads and
tablet devices.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Peter Hutterer 2016-04-06 10:14:46 -07:00 committed by Dmitry Torokhov
parent d63b0f0c0f
commit 7eb5ca09e4
1 changed files with 4 additions and 0 deletions
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4
Documentation/input/event-codes.txt
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@ -173,6 +173,10 @@ A few EV_ABS codes have special meanings:
proximity of the device and while the value of the BTN_TOUCH code is 0. If
the input device may be used freely in three dimensions, consider ABS_Z
instead.
- BTN_TOOL_<name> should be set to 1 when the tool comes into detectable
proximity and set to 0 when the tool leaves detectable proximity.
BTN_TOOL_<name> signals the type of tool that is currently detected by the
hardware and is otherwise independent of ABS_DISTANCE and/or BTN_TOUCH.
* ABS_MT_<name>:
- Used to describe multitouch input events. Please see