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

/*
 * U-Boot uImage source file with a kernel and multiple compressed FDT blobs.
 * Since the FDTs are compressed, configurations must provide a compatible
 * string to match directly.
 */

/dts-v1/;

/ {
	description = "Image with single Linux kernel and compressed FDT blobs";
	#address-cells = <1>;

	images {
		kernel {
			description = "Vanilla Linux kernel";
			data = /incbin/("./vmlinux.bin.gz");
			type = "kernel";
			arch = "ppc";
			os = "linux";
			compression = "gzip";
			load = <00000000>;
			entry = <00000000>;
			hash-1 {
				algo = "crc32";
			};
			hash-2 {
				algo = "sha1";
			};
		};
		fdt@1 {
			description = "Flattened Device Tree blob 1";
			data = /incbin/("./myboard-var1.dtb");
			type = "flat_dt";
			arch = "ppc";
			compression = "gzip";
			hash-1 {
				algo = "crc32";
			};
			hash-2 {
				algo = "sha1";
			};
		};
		fdt@2 {
			description = "Flattened Device Tree blob 2";
			data = /incbin/("./myboard-var2.dtb");
			type = "flat_dt";
			arch = "ppc";
			compression = "lzma";
			hash-1 {
				algo = "crc32";
			};
			hash-2 {
				algo = "sha1";
			};
		};
	};

	configurations {
		default = "conf@1";
		conf@1 {
			description = "Boot Linux kernel with FDT blob 1";
			kernel = "kernel";
			fdt = "fdt@1";
			compatible = "myvendor,myboard-variant1";
		};
		conf@2 {
			description = "Boot Linux kernel with FDT blob 2";
			kernel = "kernel";
			fdt = "fdt@2";
			compatible = "myvendor,myboard-variant2";
		};
	};
};