[PATCH AUTOSEL 4.4 03/21] Input: restore EV_ABS ABS_RESERVED
From: Sasha Levin
Date: Wed Dec 26 2018 - 17:59:26 EST
From: Peter Hutterer <peter.hutterer@xxxxxxxxx>
[ Upstream commit c201e3808e0e4be9b98d192802085a9f491bd80c ]
ABS_RESERVED was added in d9ca1c990a7 and accidentally removed as part of
ffe0e7cf290f5c9 when the high-resolution scrolling code was removed.
Signed-off-by: Peter Hutterer <peter.hutterer@xxxxxxxxx>
Reviewed-by: Martin Kepplinger <martin.kepplinger@xxxxxxxxxxxxx>
Acked-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Acked-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
include/uapi/linux/input-event-codes.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 87cf351bab03..9e07bf4259e1 100644
@@ -708,6 +708,15 @@
#define ABS_MISC 0x28
+ * 0x2e is reserved and should not be used in input drivers.
+ * It was used by HID as ABS_MISC+6 and userspace needs to detect if
+ * the next ABS_* event is correct or is just ABS_MISC + n.
+ * We define here ABS_RESERVED so userspace can rely on it and detect
+ * the situation described above.
+#define ABS_RESERVED 0x2e
#define ABS_MT_SLOT 0x2f /* MT slot being modified */
#define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */
#define ABS_MT_TOUCH_MINOR 0x31 /* Minor axis (omit if circular) */