From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3FFB4EA8.20809@embeddededge.com> Date: Tue, 06 Jan 2004 19:11:20 -0500 From: Dan Malek MIME-Version: 1.0 To: Wolfgang Denk Cc: Robin Gilks , linuxppc mail list Subject: Re: PATCH: Another mpc8xx watchdog driver !! References: <20040106233539.63641C12DD@atlas.denx.de> Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: > In message <3FFB450D.7060405@tait.co.nz> you wrote: > >>>Do you really mean RTC here??? >> >>Yes - the 866 and derivatives (859 etc) do NOT have a Real Time Clock >>block. This means that hooking the RTC interrupt to 'kick the dog' is >>rather difficult :-)) Why would you want to do that? Not a very effective watchdog timer. Even in the most hopelessly crashed system the RTC or other timer interrupts usually continue to operate. An effective watchdog needs to be managed throughout the whole boot process and handed off along the way to some application, such that any system error will cause the application to fail to kick the timer. Good luck :-) -- Dan ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/