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Date:      Sun, 07 Nov 2021 22:40:10 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 259673] ichwd does not detect qemu i6300esb virtual watchdog
Message-ID:  <bug-259673-227-6gEq9Iuq0i@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-259673-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-259673-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259673

--- Comment #4 from Andriy Gapon <avg@FreeBSD.org> ---
I made a quick look at Linux code and there is an interesting thing.
Linux has drivers/watchdog/iTCO_wdt.c driver which is roughly equivalent to
FreeBSD ichwd and works approximately the same.  It's a "platform" driver a=
nd
its configured via an LPC driver.
But additionally there is drivers/watchdog/i6300esb.c driver specifically f=
or
6300ESB watchdog.  It attaches directly via PCI.

I am not sure if in the case of 6300ESB Linux has two drivers for the same
hardware or if the hardware actually has multiple watchdogs...

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