dtc/tests/bad-graph-child-address.dts

/dts-v1/;
 / {
	bar: bar {
		ports {
			#address-cells = <1>;
			#size-cells = <0>;
			port@0 {
				reg = <0>;
				bar_con: endpoint {
					remote-endpoint = <&foo_con>;
				};
			};
		};
	};
	foo {
		port {
			foo_con: endpoint {
				remote-endpoint = <&bar_con>;
			};
		};
	};
};