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From: Bastos Fernandez Alexandre <ALEBAS@televes.com>
To: linuxppc-embedded list <linuxppc-embedded@ozlabs.org>
Subject: Watchdog on MPC82xx
Date: Wed, 12 Apr 2006 11:48:50 +0200	[thread overview]
Message-ID: <1144835330.443ccd021b40a@webmail.televes.com:443> (raw)


Hi list,

I am trying to use the on-chip watchdog timer in the MPC8248 to
recover from system hangs.

I have been following the guidelines from the changes I have found
from Compulab.

In u-boot, the watchdog is activated and works fine. The changes in
the kernel are, basically, assigning the ppd_md.heartbeat to a function
which resets the watchdog. This is supposed to start reseting the wdt
after ppc_md.setup_arch is invoked, but this is not working, and the
kernel keeps rebooting during startup.

I have tried to catch the point when this happens to force a WD service
sequence before that, but I had no success.

So, can anyone give me some guidelines for this job? I have seen from
freescale docs that MPC83xx watchdog may be the same than MPC82xx one.
So, could I use the same approach than used on MPC83xx boards?

http://patchwork.ozlabs.org/linuxppc//patch?id=4118


Thanks in advance

Alex

             reply	other threads:[~2006-04-12  8:05 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-04-12  9:48 Bastos Fernandez Alexandre [this message]
2006-04-12 11:44 ` Watchdog on MPC82xx Bastos Fernandez Alexandre
2006-04-17  7:02   ` Mike Rapoport
2006-04-19 11:13   ` Bastos Fernandez Alexandre
     [not found]     ` <005401c663a9$e1fd8930$6401a8c0@CHUCK2>
2006-04-19 14:59       ` Bastos Fernandez Alexandre
  -- strict thread matches above, loose matches on Subject: below --
2006-04-17  8:31 Bastos Fernandez Alexandre
2006-04-19 14:29 Rune Torgersen
2006-04-20 10:26 ` Bastos Fernandez Alexandre
2006-04-19 15:23 Pelton, Dave

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