dt-bindings: kbuild: Simplify examples target patsubst

Instead of stripping off the $(srctree) multiple times do it once up
front, but keep the src/obj path as it is going to be needed in
subsequent commit.

Rename the variable to CHK_DT_EXAMPLES to better reflect what it
contains.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
index 5e08e3a6a97b108c8371668af468c395b3e41413..95f1436ebcd0171e956beca11465f9ba43909d03 100644 (file)
--- a/Documentation/devicetree/bindings/Makefile
+++ b/Documentation/devicetree/bindings/Makefile
@@ -32,7 +32,7 @@ find_cmd = $(find_all_cmd) | \
                sed 's|^$(srctree)/||' | \
                grep -F -e "$(subst :," -e ",$(DT_SCHEMA_FILES))" | \
                sed 's|^|$(srctree)/|'
-CHK_DT_DOCS := $(shell $(find_cmd))
+CHK_DT_EXAMPLES := $(patsubst $(srctree)/%.yaml,%.example.dtb, $(shell $(find_cmd)))
 
 quiet_cmd_yamllint = LINT    $(src)
       cmd_yamllint = ($(find_cmd) | \
@@ -68,8 +68,8 @@ $(obj)/processed-schema.json: $(DT_DOCS) $(src)/.yamllint check_dtschema_version
        $(call if_changed_rule,chkdt)
 
 always-y += processed-schema.json
-always-$(CHECK_DT_BINDING) += $(patsubst $(srctree)/$(src)/%.yaml,%.example.dts, $(CHK_DT_DOCS))
-always-$(CHECK_DT_BINDING) += $(patsubst $(srctree)/$(src)/%.yaml,%.example.dtb, $(CHK_DT_DOCS))
+always-$(CHECK_DT_BINDING) += $(patsubst $(obj)/%,%, $(CHK_DT_EXAMPLES))
+always-$(CHECK_DT_BINDING) += $(patsubst $(obj)/%.dtb,%.dts, $(CHK_DT_EXAMPLES))
 
 # Hack: avoid 'Argument list too long' error for 'make clean'. Remove most of
 # build artifacts here before they are processed by scripts/Makefile.clean