I would really like a failsafe watchdog for my application, and I’m aware the 410c chipset has a hardware watchdog.
If the watchdog is enabled by default, are you aware what file descriptor the heartbeat input has?
I thought the standard Linux directory for watchdogs was /dev/watchdog, but that file doesn’t exist.
If it does need to be enabled, do you have any more information on the kernel options needed to enable the watchdog timer? CONFIG_QCOM_WDT was my guess, but that’s not included in your kernel.
Finally, its my understanding that the watchdog concept requires a process that resets the watchdog timer at regular intervals. This process was stopped when you ran echo ‘c’ > /proc/sysrq-trigger and its absence caused a restart. (I have been unable to reproduce this but apparently thats how its supposed to operate)
Do you have any idea what this process was and/or what module might have created it?
Thanks anyway, I’ve spent quite some time researching this, and haven’t been able to come up with anything conclusive.