sonic-buildimage/device/nokia/arm64-nokia_ixs7215_52xb-r0/platform_reboot

#!/bin/bash

function SafeReboot() {
    sync ; sync
    sudo umount -fa > /dev/null 2&>1

    # Turn off watchdog monitor gpio for correct reboot-cause
    sudo echo 1 > /sys/class/gpio/gpio41/value
    cat /sys/bus/i2c/devices/0-0041/last_reset_cause > /dev/null 2&>1
    exec /sbin/reboot
}

SafeReboot