u-boot/doc/uImage.FIT/update3.its

/*
 * Example Automatic software update file.
 */

/dts-v1/;

/ {
	description = "Automatic software updates: kernel, ramdisk, FDT";
	#address-cells = <1>;

	images {
		update-1 {
			description = "Linux kernel binary";
			data = /incbin/("./vmlinux.bin.gz");
			compression = "none";
			type = "firmware";
			load = <FF700000>;
			hash-1 {
				algo = "sha1";
			};
		};
		update-2 {
			description = "Ramdisk image";
			data = /incbin/("./ramdisk_image.gz");
			compression = "none";
			type = "firmware";
			load = <FF8E0000>;
			hash-1 {
				algo = "sha1";
			};
		};

		update-3 {
			description = "FDT blob";
			data = /incbin/("./blob.fdt");
			compression = "none";
			type = "firmware";
			load = <FFAC0000>;
			hash-1 {
				algo = "sha1";
			};
		};
	};
};