drivers/of/unittest-data/overlay_pci_node.dtso

// SPDX-License-Identifier: GPL-2.0
/dts-v1/;
/ {
	fragment@0 {
		target-path="";
		__overlay__ {
			#address-cells = <3>;
			#size-cells = <2>;
			pci-ep-bus@0 {
				compatible = "simple-bus";
				#address-cells = <1>;
				#size-cells = <1>;
				ranges = <0x0 0x0 0x0 0x0 0x1000>;
				reg = <0 0 0 0 0>;
				unittest-pci@100 {
					compatible = "unittest-pci";
					reg = <0x100 0x200>;
				};
			};
		};
	};
};