kbuild: verify dtoverlay files against schema

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

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240527-dtbo-check-schema-v1-1-ee1094f88f74@linaro.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 9f06f6aaf7fcb8f70c93478a313fac379492735c..29da0dc9776d30ed22d4a323d74f767b76a98bce 100644 (file)
--- 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)