Winbond Watchdog

perryh at perryh at
Mon Aug 23 09:31:10 UTC 2010

"Daniel O'Connor" <doconnor at> wrote:
> On 23/08/2010, at 1:24, Xin LI wrote:
> > 2010/8/7 Dag-Erling Sm?rgrav <des at>:
> >> Xin LI <delphij at> writes:
> >>> I'm still polishing up the driver, there seems to be no way to
> >>> figure out the base port address directly (datasheet said it's
> >>> either 0x2e and 0x4e) so for now I have its device identify
> >>> method to do some dirty hacks (outb/inb directly) and only
> >>> check if with appropriate key entered to the port we will get
> >>> non-0xff value.
> >>
> >> Sounds gross, but if there's no other way, I guess it'll have
> >> to do.  I imagine you check the PCI id etc. first?
> >
> > It's not a PCI device unfortunately (at least, not the one
> > I have encountered on my Supermicro board).
> They're LPC ISA devices, I don't know if they appear in any PNP
> or ACPI tables though.

Any mainboard device on a non-enumerable bus, including LPC, is
_supposed_ to be reported in the ACPI tables -- precisely to avoid
the need for drivers to engage in risky probing to find their
hardware.  That's no guarantee of course -- there are plenty of
buggy BIOS around -- but it might be worth looking to see if this
one got it right.

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