of: Add unit tests for applying overlays

Existing overlay unit tests examine individual pieces of the overlay
code.  The new tests target the entire process of applying an overlay.

Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/of/unittest-data/overlay_bad_phandle.dts b/drivers/of/unittest-data/overlay_bad_phandle.dts
new file mode 100644
index 000000000000..270ee885a623
--- /dev/null
+++ b/drivers/of/unittest-data/overlay_bad_phandle.dts
@@ -0,0 +1,20 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+
+	fragment@0 {
+		target = <&electric_1>;
+
+		__overlay__ {
+
+			// This label should cause an error when the overlay
+			// is applied.  There is already a phandle value
+			// in the base tree for motor-1.
+			spin_ctrl_1_conflict: motor-1 {
+				accelerate = < 3 >;
+				decelerate = < 5 >;
+			};
+		};
+	};
+};