# Global options
  page_size=4096
  id=0x100                # Read the value form the path in dtb
  rev=0x100               # Read the value form the path in dtb
  custom0=0xabc           # default value
  version=1

board1v1.dts.dtb

board1v1_1.dts.dtb
  id=0xddccbbaa           # override with another path
  rev=0x01000100          # override default rev

board2v1.dts.dtb
  id=0x200
  rev=0x201               # override with another value

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