dracut/modules.d/04watchdog/watchdog.sh

#!/bin/sh
if [ -e /dev/watchdog ]; then
    if [ ! -e /tmp/watchdog_timeout ]; then
        wdctl -s 60 /dev/watchdog > /dev/null 2>&1
        : > /tmp/watchdog_timeout
    fi
    info "Triggering watchdog"
    : > /dev/watchdog
else
    modprobe ib700wdt
    modprobe i6300esb
fi