tests: Add additional tests for device graph checks

* bad-graph-child-address.dts: additional child address test since the
    one in bad-graph.dts is now shadowed by its prerequisites also
    failing.
* bad-graph-reg-cells.dts: test warnings produced by check_graph_reg().

Signed-off-by: Johannes Beisswenger <johannes.beisswenger@cetitec.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tests/bad-graph-child-address.dts

@@ -0,0 +1,22 @@
+/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>;
+			};
+		};
+	};
+};

tests/bad-graph-reg-cells.dts

@@ -0,0 +1,36 @@
+/dts-v1/;
+ / {
+	bar: bar {
+		ports {
+			#address-cells = <1>;
+			#size-cells = <1>; // should always be 0
+			port@1 {
+				reg = <1 2>; // should always contain only a single cell
+				bar_con: endpoint {
+					remote-endpoint = <&foo_con>;
+				};
+			};
+			port@2 {
+				reg = <2>;
+				bar_con2: endpoint {
+					remote-endpoint = <&foo_con2>;
+				};
+			};
+		};
+	};
+	foo {
+		port {
+			#address-cells = <1>;
+			#size-cells = <1>; // should always be 0
+			foo_con: endpoint@1 {
+				reg = <1 2>; // should always contain only a single cell
+				remote-endpoint = <&bar_con>;
+			};
+			foo_con2: endpoint@2 {
+				reg = <2>;
+				remote-endpoint = <&bar_con2>;
+			};
+		};
+
+	};
+};

tests/run_tests.sh

@@ -734,6 +734,9 @@ dtc_tests () {
     check_tests "$SRCDIR/bad-graph-root2.dts" graph_nodes
     check_tests "$SRCDIR/bad-graph-root3.dts" graph_nodes
     check_tests "$SRCDIR/bad-graph-root4.dts" graph_nodes
+    check_tests "$SRCDIR/bad-graph-reg-cells.dts" graph_endpoint
+    check_tests "$SRCDIR/bad-graph-reg-cells.dts" graph_port
+    check_tests "$SRCDIR/bad-graph-child-address.dts" graph_child_address
     run_sh_test "$SRCDIR/dtc-checkfails.sh" deprecated_gpio_property -- -Wdeprecated_gpio_property -I dts -O dtb "$SRCDIR/bad-gpio.dts"
     run_sh_test "$SRCDIR/dtc-checkfails.sh" -n deprecated_gpio_property -- -Wdeprecated_gpio_property -I dts -O dtb "$SRCDIR/good-gpio.dts"
     check_tests "$SRCDIR/bad-interrupt-cells.dts" interrupts_property