MX-4 Wake on Real Time Clock (set alarm) using go-to-sleep script

On MX-4 platforms, wake on RTC can be configured using the /opt/hm/go_to_sleep.sh script.

/opt/hm/go_to_sleep.sh -h
Usage: go_to_sleep.sh options (t:hdcCnsaD)
        -t <time in seconds> - Setup wakealarm (rtc)
        -d - Disable wake on DIGITAL-IN-2
        -a - Disable wake on START-SIGNAL
        -l <mV level> - START-SIGNAL wake-up volt level
        -c - Wake on CAN
        -n - Will renew dhcp lease
        -C - Disable suspend CAN for quicker wakeup-time
        -s - Will suspend modem (turn off), Will not restore on wake up
        -D <time in seconds> - Will enter deep sleep.
            Power to main CPU will be cut after specified time and it
            will restart with a cold reboot on wake up. The application
            is responsible of shutting down the system properly before
            the power is cut.
        -p <wake up mask> - Mask to enable/disable wakeup sources
        -h - Print this text