From: Peter Hutterer peter.hutterer@who-t.net
[ 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@who-t.net Reviewed-by: Martin Kepplinger martin.kepplinger@ginzinger.com Acked-by: Benjamin Tissoires benjamin.tissoires@redhat.com Acked-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Benjamin Tissoires benjamin.tissoires@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 --- a/include/uapi/linux/input-event-codes.h +++ b/include/uapi/linux/input-event-codes.h @@ -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) */