2.6 - synaptics touchpad not handled by any driver

["Andrey Borzenkov"]

It appeared recently on a.o.l.m. Synaptics touchpad is not handled
by any driver except evdev. It is located in drivers/input/mouse and
is part of psmouse so one would logically assume it is handled by
mousedev - but it does not advertise any capability accepted by mousedev.

I: Bus=0011 Vendor=0002 Product=0007 Version=0000
N: Name="Synaptics Synaptics TouchPad"
P: Phys=isa0060/serio1/input0
H: Handlers=
B: EV=1b
B: KEY=670000 0 0 0 0 0 0 0 0
B: ABS=1000003
B: MSC=4

the buttons advertised are

BTN_LEFT, BTN_RIGHT, BTN_MIDDLE, BTN_FORWARD, BTN_BACK.

mousedev accepts device with absolute coordinates only if it
advertises BTN_TOUCH:

        {
              .flags    = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KE
YBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
              .evbit    = { BIT(EV_KEY) | BIT(EV_ABS) },
              .keybit   = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
              .absbit   = { BIT(ABS_X) | BIT(ABS_Y) },
         },/* A tablet like device, at least touch detection, two absolute axes

the same as tsdev.

something is fishy :) poor guy expected it to work like a mouse -
just like 2.4 did.

-andrey

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