Re: SP805 driver

[Udit Kumar <udit.kumar@nxp.com>]

> > > > Coming back to hardware, which does not have mask around wdt, how
> > > > to implement this feature.
> > >
> > > Simple - you can't.
> > >
> > > You can absolutely implement exactly the functionality you have
> > > today, with minimal changes to the protocol - it just should not be
> > > registered as an implementation of
> EFI_WATCHDOG_TIMER_ARCH_PROTOCOL.
> >
> > I believe,  EFI_WATCHDOG_TIMER_ARCH_PROTOCOL is must Are you
> > suggesting to EFI_WATCHDOG_TIMER_ARCH_PROTOCOL from
> MdeModulePkg and
> > hook platform specific code with this.
> > Or simply register EFI_WATCHDOG_TIMER_ARCH_PROTOCOL with dummy
> functions.
> 
> Are you referring to
> MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf?

Yes !! 
 
> That is certainly what most of the platforms in edk2-platforms use.
> 
> The EFI_WATCHDOG_TIMER_ARCH_PROTOCOL is used by core code.
> 
> If you want to use your hardware watchdog as part of your platform specific
> code, that is absolutely fine and probably a very good idea - but it has nothing to
> do with this protocol.  There is nothing forcing you to use the platform-
> independent EFI_WATCHDOG_TIMER_ARCH_PROTOCOL for this.

Yes, this was idea to use MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf
and if needed, install a custom protocol for hardware wdt. And this to be used by platform specific code.

> Regards,
> 
> Leif