Followup to: <200111050044.fA50i8o182130@saturn.cs.uml.edu>
By author: "Albert D. Cahalan" <acahalan@cs.uml.edu>
In newsgroup: linux.dev.kernel
>
> Tundra provides an example: Universe, Universe II, Universe IIB
>
> These chips are the same device in some sense; they are all
> PCI-to-VME bridges. (damn popular too) The programming interface
> is incompatible, so they get different revisions. Tundra isn't
> alone in interpreting the PCI spec this way.
>
Another interpretation, which seems pretty common (we use this one at
Transmeta, for example) is to treat the version ID as the "minor
revision" (indicating an upward compatible change) and the device ID
as the "major revision" (change this to indicate an incompatible
change in the programming interface.)
Unfortunately PCI doesn't have the very nice "compatible with" list
that ISAPnP has -- that, and the "human readable string" were very
useful features of the ISAPnP spec.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Nov 07 2001 - 21:00:24 EST