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