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Commit 2310568f authored by Hans de Goede's avatar Hans de Goede Committed by Dmitry Torokhov
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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: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 4f8d8088

Documentation/input/alps.txt

+7 −2
Original line number Diff line number Diff line
@@ -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

---------------------------------------------