checks: add phandle with arg property checks

Many common bindings follow the same pattern of client properties
containing a phandle and N arg cells where N is defined in the provider
with a '#<specifier>-cells' property such as:

	intc0: interrupt-controller@0 {
		#interrupt-cells = <3>;
	};
	intc1: interrupt-controller@1 {
		#interrupt-cells = <2>;
	};

	node {
		interrupts-extended = <&intc0 1 2 3>, <&intc1 4 5>;
	};

Add checks for properties following this pattern.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/bad-phandle-cells.dts b/tests/bad-phandle-cells.dts
new file mode 100644
index 0000000..7f7c6a2
--- /dev/null
+++ b/tests/bad-phandle-cells.dts
@@ -0,0 +1,11 @@
+/dts-v1/;
+
+/ {
+	intc: interrupt-controller {
+		#interrupt-cells = <3>;
+	};
+
+	node {
+		interrupts-extended = <&intc>;
+	};
+};