tests: Add some basic tests for the pci_bridge checks

This adds some simple tests for the checks of correctly formatted PCI
bridge nodes.  Doesn't test all that much, but it's a start.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tests/pci-bridge-bad1.dts

@@ -0,0 +1,16 @@
+/dts-v1/;
+
+/ {
+	compatible = "example,pci-bridge-ok";
+	#address-cells = < 2 >;
+	#size-cells = < 2 >;
+	abadname@0 {
+		device_type = "pci";
+		compatible = "example,pci-bridge";
+		#address-cells = < 3 >;
+		#size-cells = < 2 >;
+		reg = <0 0 0 0x1000>;
+		bus-range = <0 0xff>;
+		ranges = <0 0 0 0 0 0 0x10000>;
+	};
+};

tests/pci-bridge-bad2.dts

@@ -0,0 +1,16 @@
+/dts-v1/;
+
+/ {
+	compatible = "example,pci-bridge-ok";
+	#address-cells = < 2 >;
+	#size-cells = < 2 >;
+	p@0 {
+		device_type = "pci";
+		compatible = "example,pci-bridge";
+		#address-cells = < 3 >;
+		#size-cells = < 2 >;
+		reg = <0 0 0 0x1000>;
+		bus-range = <0 0xff>;
+		ranges = <0 0 0 0 0 0 0x10000>;
+	};
+};

tests/pci-bridge-ok.dts

@@ -0,0 +1,25 @@
+/dts-v1/;
+
+/ {
+	compatible = "example,pci-bridge-ok";
+	#address-cells = < 2 >;
+	#size-cells = < 2 >;
+	pci@0 {
+		device_type = "pci";
+		compatible = "example,pci-bridge";
+		#address-cells = < 3 >;
+		#size-cells = < 2 >;
+		reg = <0 0 0 0x1000>;
+		bus-range = <0 0xff>;
+		ranges = <0 0 0 0 0 0 0x10000>;
+	};
+	pcie@10000000000 {
+		device_type = "pci";
+		compatible = "example,pcie-bridge";
+		#address-cells = < 3 >;
+		#size-cells = < 2 >;
+		reg = <0x10 0x00000000 0 0x1000>;
+		bus-range = <0 0xff>;
+		ranges = <0 0 0 0 0 0 0x10000>;
+	};
+};

tests/run_tests.sh

@@ -574,6 +574,10 @@ dtc_tests () {
     run_test check_path test_tree1.dtb exists "/subnode@1"
     run_test check_path test_tree1.dtb not-exists "/subnode@10"
 
+    check_tests pci-bridge-ok.dts -n pci_bridge
+    check_tests pci-bridge-bad1.dts pci_bridge
+    check_tests pci-bridge-bad2.dts pci_bridge
+
     # Check warning options
     run_sh_test dtc-checkfails.sh address_cells_is_cell interrupt_cells_is_cell -n size_cells_is_cell -- -Wno_size_cells_is_cell -I dts -O dtb bad-ncells.dts
     run_sh_test dtc-fails.sh -n test-warn-output.test.dtb -I dts -O dtb bad-ncells.dts