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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2015-04-21 11:12:42 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2015-04-21 11:12:42 -0700
commit48853389f206b689260ddfd3006816779ca7a52a (patch)
tree8abc3be612779c3252190bc54a38eb0b3c258e19 /Documentation/input
parent85a3685852d9ac7d92be9d824533c915a4597fa4 (diff)
parentc9eeb5084b27ffede2709e8775827729d0c7c46c (diff)
downloadlinux-48853389f206b689260ddfd3006816779ca7a52a.tar.gz
Merge branch 'next' into for-linus
Prepare second round of updates for 4.1 merge window.
Diffstat (limited to 'Documentation/input')
-rw-r--r--Documentation/input/alps.txt9
1 files 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
 ---------------------------------------------