linux-kernel - Re: [11/12] watchdog: sp5100-tco: Abort if watchdog is disabled by hardware

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Date:   Tue, 09 Jan 2018 19:04:25 -0500
From:   Lyude Paul <lyude@...hat.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Wim Van Sebroeck <wim@...ana.be>, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Zoltán Böszörményi <zboszor@...hu>
Subject: Re: [11/12] watchdog: sp5100-tco: Abort if watchdog is disabled by
 hardware

How exactly did you go about enabling the Super-IO watchdog on your MSI board?
 This is an MSI A320M that I'm trying to make work here

On Tue, 2018-01-09 at 15:37 -0800, Guenter Roeck wrote:
> Hi,
> 
> On Tue, Jan 09, 2018 at 05:58:07PM -0500, Lyude Paul wrote:
> > Hi! I'm the one from the Fedora bugzilla who said they'd help review these
> > patches. I might end up responding to this with a real review comment
> > after
> > this message, but first:
> > 
> > mind cc'ing me future versions of this patchset and also, is there any way
> > you
> 
> Sure.
> 
> > know of that one could figure out whether or not the sp5100_tco wdt is
> > actually disabled by the OEM on a board? I tried testing these patches
> > with my
> 
> That is what the code is trying to do today.
> 
> > system and it appears to be convinced that it's disabled on my system, but
> > I'm
> > hoping something in this patch is just broken…
> > 
> 
> I tested the driver on three different boards. MSI B350M MORTAR,
> MSI B350 TOMAHAWK, and Gigabyte AB350M-Gaming 3. CPU is Ryzen 1700X
> on all boards.
> 
> On the MSI boards, the watchdog is reported as disabled. Enabling it
> and letting it expire does not have an effect. I am using the Super-IO
> watchdog instead on those boards (and it works).
> 
> On the Gigabyte board, the watchdog is reported as enabled, and it works
> (and the watchdog on the Super-IO chips does not work).
> 
> Feel free to play with the driver. Maybe there is a means to enable the
> watchdog if it is disabled. Unfortunately, I was unable to figure out how
> to do it, so I thought it is better to report the fact and not instantiate
> the watchdog if it doesn't work.
> 
> Hope this helps,
> Guenter
-- 
Cheers,
	Lyude Paul