From 2310568f570e0f95bfb1cc79ff7db617e782e25c Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Wed, 15 Apr 2015 10:48:32 -0700 Subject: [PATCH] Input: alps - document separate pointstick button bits for V2 devices Non interleaved dualpoint v2 devices have separate pointstick button bits, document this. Signed-off-by: Hans de Goede Signed-off-by: Dmitry Torokhov --- Documentation/input/alps.txt | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/Documentation/input/alps.txt b/Documentation/input/alps.txt index 92ae734c00c3..e301887d8523 100644 --- a/Documentation/input/alps.txt +++ b/Documentation/input/alps.txt @@ -94,6 +94,10 @@ PS/2 packet format Note that the device never signals overflow condition. +For protocol version 2 devices when the trackpoint is used, and no fingers +are on the touchpad, the M R L bits signal the combined status of both the +pointingstick and touchpad buttons. + ALPS Absolute Mode - Protocol Version 1 -------------------------------------- @@ -107,7 +111,7 @@ ALPS Absolute Mode - Protocol Version 1 ALPS Absolute Mode - Protocol Version 2 --------------------------------------- - byte 0: 1 ? ? ? 1 ? ? ? + byte 0: 1 ? ? ? 1 PSM PSR PSL byte 1: 0 x6 x5 x4 x3 x2 x1 x0 byte 2: 0 x10 x9 x8 x7 ? fin ges byte 3: 0 y9 y8 y7 1 M R L @@ -115,7 +119,8 @@ ALPS Absolute Mode - Protocol Version 2 byte 5: 0 z6 z5 z4 z3 z2 z1 z0 Protocol Version 2 DualPoint devices send standard PS/2 mouse packets for -the DualPoint Stick. +the DualPoint Stick. For non interleaved dualpoint devices the pointingstick +buttons get reported separately in the PSM, PSR and PSL bits. Dualpoint device -- interleaved packet format --------------------------------------------- -- 2.20.1