# Global options
  page_size=4096
  id=/:board_id           # Read the value form the path in dtb
  rev=/:board_rev         # Read the value form the path in dtb
  custom0=0xabc           # default value
  version=1

board1v1.dts.dtb

board1v1_1.dts.dtb
  id=/:another_board_id   # override with another path

board2v1.dts.dtb
  rev=0x201               # override with another value

board1v1.dts.dtb
  custom0=0xdef           # override with another value

board1v1.dts.dtb
  custom0=0xdee           # override with another value