u-boot-brain/tools/binman/test/131_pack_align_section.dts

/dts-v1/;

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

	binman {
		u-boot {
		};
		section0 {
			type = "section";
			align = <0x10>;
			u-boot {
			};
		};
		section1 {
			type = "section";
			align-size = <0x20>;
			u-boot {
			};
			section2 {
				type = "section";
				u-boot {
				};
			};
		};
	};
};