[PATCH] kbuild: allow checking single device tree file

[Dmitry Baryshkov]

Add support for testing single device tree file by running
'make tree.dt.yaml', e.g. 'make ARCH=arm64 qcom/qrb5165-rb5.dt.yaml'.
This looks useful for checking idividual changes to dts files.

Cc: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
 Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Makefile b/Makefile
index 53d09c414635..b36a3d48eb68 100644
--- a/Makefile
+++ b/Makefile
@@ -1383,6 +1383,10 @@ ifneq ($(dtstree),)
 %.dtbo: include/config/kernel.release scripts_dtc
 	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
 
+%.dt.yaml: include/config/kernel.release scripts_dtc
+	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings Documentation/devicetree/bindings/processed-schema.json
+	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ CHECK_DTBS=y
+
 PHONY += dtbs dtbs_install dtbs_check
 dtbs: include/config/kernel.release scripts_dtc
 	$(Q)$(MAKE) $(build)=$(dtstree)
-- 
2.30.2