[PATCH] kbuild: verify dtoverlay files against schema

[Dmitry Baryshkov]

Currently only the single part device trees are validated against DT
schema. For the multipart schema files only the first file is validated.
Extend the fdtoverlay commands to validate the resulting DTB file
against schema.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
 scripts/Makefile.lib | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 9f06f6aaf7fc..29da0dc9776d 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -407,8 +407,15 @@ cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ;
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
+DT_CHECK_CMD = $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA)
+
+ifneq ($(CHECK_DTBS),)
+quiet_cmd_fdtoverlay = DTOVLCH $@
+      cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(real-prereqs) ; $(DT_CHECK_CMD) $@ || true
+else
 quiet_cmd_fdtoverlay = DTOVL   $@
       cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(real-prereqs)
+endif
 
 $(multi-dtb-y): FORCE
 	$(call if_changed,fdtoverlay)
@@ -421,7 +428,7 @@ DT_BINDING_DIR := Documentation/devicetree/bindings
 DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json
 
 quiet_cmd_dtb =	DTC_CHK $@
-      cmd_dtb =	$(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true
+      cmd_dtb =	$(cmd_dtc) ; $(DT_CHECK_CMD) $@ || true
 else
 quiet_cmd_dtb = $(quiet_cmd_dtc)
       cmd_dtb = $(cmd_dtc)

---
base-commit: 8314289a8d50a4e05d8ece1ae0445a3b57bb4d3b
change-id: 20240527-dtbo-check-schema-4f695cb98de5

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>