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authorLinus Torvalds <torvalds@linux-foundation.org>2014-07-23 15:42:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-07-23 15:42:53 -0700
commitb292d6b5c4220d527c92316c0d11d16e9895f07e (patch)
treeda823cb677507c313643886b45dc3d03827c9d96 /Documentation/input
parent7442cf9ac2de31b33311209476cd81398d3863cf (diff)
parentf62d14a8072b9756db36ba394e2b267470a40240 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input layer fixes from Dmitry Torokhov: "A few fixups for the input subsystem" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: document INPUT_PROP_TOPBUTTONPAD Input: fix defuzzing logic Input: sirfsoc-onkey - fix GPL v2 license string typo Input: st-keyscan - fix 'defined but not used' compiler warnings Input: synaptics - add min/max quirk for pnp-id LEN2002 (Edge E531) Input: i8042 - add Acer Aspire 5710 to nomux blacklist Input: ti_am335x_tsc - warn about incorrect spelling Input: wacom - cleanup multitouch code when touch_max is 2
Diffstat (limited to 'Documentation/input')
-rw-r--r--Documentation/input/event-codes.txt13
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.