Internal touchpads with trackpoints are either BUS_I8042 or BUS_I2C, but not
BUS_USB. Lenovo sells external keyboards with a trackpoint built-in, make sure
we don't pair that trackpoint with the internal touchpad.
And likewise, the internal trackpoint should not be paired with e.g. a wacom
touch device.
Lenovo had one external device that has a trackpoint and a touchpad on an
external keyboard. That device won't be covered with this patch, if we have a
user we can re-consider.
https://bugs.freedesktop.org/show_bug.cgi?id=89935
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>