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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 <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Hans de Goede 2015-04-15 10:48:32 -07:00 committed by Dmitry Torokhov
parent 4f8d808889
commit 2310568f57
1 changed files with 7 additions and 2 deletions
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9
Documentation/input/alps.txt
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@ -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
---------------------------------------------