Support hardware watchdog for openbmc

[Patrick Williams]

On Mon, Feb 06, 2023 at 08:11:41AM +0000, Delphine_CC_Chiu/WYHQ/Wiwynn wrote:
> Dear OpenBMC members,
> 
> We have implemented hardware watchdog for Facebook platform and we want to promote
> it to meta-phosphor level. The implementation is adding systemd configuration which will
> enable device 'dev/watchdog'. The BMC system will auto reboot when watchdog timeout.
> 
> The implementation can be seen at the link: (gerrit number 59881)
> meta-phosphor: enable hardware watchdog (Ic46bcd9b) * Gerrit Code Review (openbmc.org)<https://gerrit.openbmc.org/c/openbmc/openbmc/+/59881>
> 
> Please leave some comments if you have any opinion, thanks.
> 
> Best Regards,
> Delphine CC Chiu

It does look like meta-google has some existing configuration we may
need to reconcile.  I added Willy and William to the commit for review
as well.  They (Google) chose 120s for the watchdog interval.  I don't
think we (Meta) care too much on the specific value chosen.

-- 
Patrick Williams
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