Re: Are there ACPI watchdog timers?

["Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>]

On Sun, Feb 07, 2010 at 03:56:49PM -0500, Thor Lancelot Simon wrote:
> I don't like the idea of banging directly on device registers if ACPI
> might think it's managing some other part of the device -- or the whole
> thing.
> 
> Most SuperI/O and environmental sensor chips (and combinations thereof)
> these days include watchdog timers.  I want to hook some of these up to
> /dev/watchdog but, if possible, I'd prefer to use the ACPI interface -- if
> there even is one.
> 
> Can someone tell me if there is such a thing, if it's generaly implemented,
> and if so, where it's described?

Looks like there is.

http://www.microsoft.com/whdc/system/sysinternals/watchdog.mspx
http://www.microsoft.com/whdc/system/sysinternals/hw-wdt.mspx

No idea how widely implemented these are, look
for a WDAT or WDRT table in acpidump output.

        Jonathan Kollasch