u-boot/tools/binman/test/118_fdtmap_hdr_pos.dts

/dts-v1/;

/ {
	#address-cells = <1>;
	#size-cells = <1>;

	binman {
		size = <0x400>;
		sort-by-offset;
		u-boot {
			offset = <0x100>;
		};
		fdtmap {
		};
		image-header {
			offset = <0x80>;
		};
	};
};