of/overlay: Add overlay unittests
Add unittests for OF overlays.
It tests overlay device addition/removal and whether
the apply revert sequence is correct.
Changes since V1:
* Added local fixups entries.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
diff --git a/drivers/of/unittest-data/tests-overlay.dtsi b/drivers/of/unittest-data/tests-overlay.dtsi
new file mode 100644
index 0000000..75976da
--- /dev/null
+++ b/drivers/of/unittest-data/tests-overlay.dtsi
@@ -0,0 +1,180 @@
+
+/ {
+ testcase-data {
+ overlay-node {
+
+ /* test bus */
+ selftestbus: test-bus {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ selftest100: test-selftest100 {
+ compatible = "selftest";
+ status = "okay";
+ reg = <100>;
+ };
+
+ selftest101: test-selftest101 {
+ compatible = "selftest";
+ status = "disabled";
+ reg = <101>;
+ };
+
+ selftest0: test-selftest0 {
+ compatible = "selftest";
+ status = "disabled";
+ reg = <0>;
+ };
+
+ selftest1: test-selftest1 {
+ compatible = "selftest";
+ status = "okay";
+ reg = <1>;
+ };
+
+ selftest2: test-selftest2 {
+ compatible = "selftest";
+ status = "disabled";
+ reg = <2>;
+ };
+
+ selftest3: test-selftest3 {
+ compatible = "selftest";
+ status = "okay";
+ reg = <3>;
+ };
+
+ selftest5: test-selftest5 {
+ compatible = "selftest";
+ status = "disabled";
+ reg = <5>;
+ };
+
+ selftest6: test-selftest6 {
+ compatible = "selftest";
+ status = "disabled";
+ reg = <6>;
+ };
+
+ selftest7: test-selftest7 {
+ compatible = "selftest";
+ status = "disabled";
+ reg = <7>;
+ };
+
+ selftest8: test-selftest8 {
+ compatible = "selftest";
+ status = "disabled";
+ reg = <8>;
+ };
+ };
+ };
+
+ /* test enable using absolute target path */
+ overlay0 {
+ fragment@0 {
+ target-path = "/testcase-data/overlay-node/test-bus/test-selftest0";
+ __overlay__ {
+ status = "okay";
+ };
+ };
+ };
+
+ /* test disable using absolute target path */
+ overlay1 {
+ fragment@0 {
+ target-path = "/testcase-data/overlay-node/test-bus/test-selftest1";
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+ };
+
+ /* test enable using label */
+ overlay2 {
+ fragment@0 {
+ target = <&selftest2>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+ };
+
+ /* test disable using label */
+ overlay3 {
+ fragment@0 {
+ target = <&selftest3>;
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+ };
+
+ /* test insertion of a full node */
+ overlay4 {
+ fragment@0 {
+ target = <&selftestbus>;
+ __overlay__ {
+
+ /* suppress DTC warning */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ test-selftest4 {
+ compatible = "selftest";
+ status = "okay";
+ reg = <4>;
+ };
+ };
+ };
+ };
+
+ /* test overlay apply revert */
+ overlay5 {
+ fragment@0 {
+ target-path = "/testcase-data/overlay-node/test-bus/test-selftest5";
+ __overlay__ {
+ status = "okay";
+ };
+ };
+ };
+
+ /* test overlays application and removal in sequence */
+ overlay6 {
+ fragment@0 {
+ target-path = "/testcase-data/overlay-node/test-bus/test-selftest6";
+ __overlay__ {
+ status = "okay";
+ };
+ };
+ };
+ overlay7 {
+ fragment@0 {
+ target-path = "/testcase-data/overlay-node/test-bus/test-selftest7";
+ __overlay__ {
+ status = "okay";
+ };
+ };
+ };
+
+ /* test overlays application and removal in bad sequence */
+ overlay8 {
+ fragment@0 {
+ target-path = "/testcase-data/overlay-node/test-bus/test-selftest8";
+ __overlay__ {
+ status = "okay";
+ };
+ };
+ };
+ overlay9 {
+ fragment@0 {
+ target-path = "/testcase-data/overlay-node/test-bus/test-selftest8";
+ __overlay__ {
+ property-foo = "bar";
+ };
+ };
+ };
+
+ };
+};