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| author | Peter Hutterer <peter.hutterer@who-t.net> | 2014-07-21 17:51:35 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-07-22 22:20:48 -0700 |
| commit | f62d14a8072b9756db36ba394e2b267470a40240 (patch) | |
| tree | 96a350b2e5a479fff5f46e25c86e288f77cfab9c /Documentation | |
| parent | 50c5d36dab930b1f1b1e3348b8608aa8b9ee7610 (diff) | |
Input: document INPUT_PROP_TOPBUTTONPAD
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/input/event-codes.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt index f1ea2c69648d..c587a966413e 100644 --- a/Documentation/input/event-codes.txt +++ b/Documentation/input/event-codes.txt @@ -281,6 +281,19 @@ gestures can normally be extracted from it. If INPUT_PROP_SEMI_MT is not set, the device is assumed to be a true MT device. +INPUT_PROP_TOPBUTTONPAD: +----------------------- +Some laptops, most notably the Lenovo *40 series provide a trackstick +device but do not have physical buttons associated with the trackstick +device. Instead, the top area of the touchpad is marked to show +visual/haptic areas for left, middle, right buttons intended to be used +with the trackstick. + +If INPUT_PROP_TOPBUTTONPAD is set, userspace should emulate buttons +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. + Guidelines: ========== The guidelines below ensure proper single-touch and multi-finger functionality. |