linux-kernel - Re: How to kick a secondary watchdog? (Re: [PATCH 1/3] watchdog: sync linux-omap changes)

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Message-ID: <20080923111954.GU22550@infomag.infomag.iguana.be>
Date:	Tue, 23 Sep 2008 13:19:54 +0200
From:	Wim Van Sebroeck <wim@...ana.be>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Felipe Balbi <me@...ipebalbi.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"George G. Davis" <gdavis@...sta.com>, Alan Cox <alan@...hat.com>,
	Felipe Balbi <felipe.balbi@...ia.com>
Subject: Re: How to kick a secondary watchdog? (Re: [PATCH 1/3] watchdog: sync linux-omap changes)

Hi Tony,

> Wim, while at it, here's a related omap_wdt question:
> 
> Some omap devices like Nokia 770, N800 and N810 have also a secondary
> watchdog on the retu chip connected via cbus. This watchdog needs
> to be kicked as it cannot be disabled.
> 
> We've been thinking of adding a function that omap_wdt can
> call to also kick retu_wdt too as there is only one wdt interface.
> 
> Is there some better solution available?

Plan is to go to a uniform watchdog driver first, then add sysfs
capabilities and then we can add more devices via sysfs.
For the time being: I would kick both of them at the same time
via the /dev/watchdog interface.

Regards,
Wim.

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