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

/*
 * Simple U-Boot uImage source file containing a single kernel
 */

/dts-v1/;

/ {
	description = "Simple image with single Linux kernel";
	#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";
			};
		};
	};

	configurations {
		default = "config-1";
		config-1 {
			description = "Boot Linux kernel";
			kernel = "kernel";
		};
	};
};



For x86 a setup node is also required: see x86-fit-boot.txt.

/dts-v1/;

/ {
	description = "Simple image with single Linux kernel on x86";
	#address-cells = <1>;

	images {
		kernel {
			description = "Vanilla Linux kernel";
			data = /incbin/("./image.bin.lzo");
			type = "kernel";
			arch = "x86";
			os = "linux";
			compression = "lzo";
			load = <0x01000000>;
			entry = <0x00000000>;
			hash-2 {
				algo = "sha1";
			};
		};

		setup {
			description = "Linux setup.bin";
			data = /incbin/("./setup.bin");
			type = "x86_setup";
			arch = "x86";
			os = "linux";
			compression = "none";
			load = <0x00090000>;
			entry = <0x00090000>;
			hash-2 {
				algo = "sha1";
			};
		};
	};

	configurations {
		default = "config-1";
		config-1 {
			description = "Boot Linux kernel";
			kernel = "kernel";
			setup = "setup";
		};
	};
};

Note: the above assumes a 32-bit kernel. To directly boot a 64-bit kernel,
change both arch values to "x86_64". U-Boot will then change to 64-bit mode
before booting the kernel (see boot_linux_kernel()).