Date: Sat, 12 Dec 2009 13:50:35 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Cypher Wu <cypher.w@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>,
       linux-kernel@vger.kernel.org
Subject: Re: Questions about Watch Dog Timer under Linux.
Message-ID: <20091212135035.0d01018d@lxorguk.ukuu.org.uk>
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	<f9f38a550912110027r70710867k3a08c6d5913ce13@mail.gmail.com>
	<20091211102159.GB18825@rakim.wolfsonmicro.main>
	<f9f38a550912111946w665b267dkc42d184bdc437d02@mail.gmail.com>
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> timer. This type of WDT is widely used in our embedded systems and we
> usually install a callback in timer interrupt to clearing WD before
> BSP starting the RTOS kernel, and then starting a task to clear WD and
> uninstall the callback.
> I'm wonder when cope with that type of WD, is there any framework
> already in the Linux kernel and booter, or I've to modify them by
> myself?

Without knowing which boot environment you are using I don't know. For
the kernel itself you may need to touch the timer early on in boot (in
your platform setup code), then set up the driver early on.

There isn't a general framework for this although there may be one I
don't know about implemented in some other specific platform.

Alan
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