specific platform check in driver match routine

[Frank Kardel <kardel%netbsd.org@localhost>]

Hi driver-wranglers,

is there a good way that a match routine can verify it is a running on a 
certain
platform. E.g. isa bus based GPIO registers there are present on a 
Soekris net6501 only.
From dmesg I have only seen that MPBIOS can find the vendor and device 
information.
Do we collect and BIOS/ACPI supplied platform information in an MI way 
for later persual?
I know that ACPI information is available via sysctl, but the Soekris 
does not supply
any ACPI tables.

I believe verifying that the io ports at 0x680-0x69f actually toggle the 
GPIO pins is
not really feasable.

Frank