Documentation/devicetree/bindings/power/reset/restart-poweroff.txt

   1 * Restart Power Off
   2
   3 Buffalo Linkstation LS-XHL and LS-CHLv2, and other devices power off
   4 by restarting and letting u-boot keep hold of the machine until the
   5 user presses a button.
   6
   7 Required Properties:
   8 - compatible: Should be "restart-poweroff"