dt-bindings: wire style checker into dt_binding_check

Run dt-check-style as part of dt_binding_check_one. The recipe wraps
the tool with scripts/jobserver-exec so worker count follows the GNU
make jobserver -- `make -j N dt_binding_check` constrains the checker
to N workers rather than spawning one per CPU.

Default mode (relaxed) is zero-violation on the current tree, so this
does not introduce new warnings into make dt_binding_check. Stricter
rules are available via --mode=strict (eg. for use by checkpatch.pl in
a future series).

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/a14fdbded0acdc4fef1c1278100f2f4c6a93a488.1779908995.git.daniel@makrotopia.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
index 7b668f7fd4007f03bb61d942926fe493339d1f6e..00149e8242611f37369f3db6715ca95ee24c6185 100644 (file)
--- a/Documentation/devicetree/bindings/Makefile
+++ b/Documentation/devicetree/bindings/Makefile
@@ -46,6 +46,18 @@ quiet_cmd_chk_bindings = CHKDT   $(src)
                          xargs -n200 -P$$(nproc) $(DT_DOC_CHECKER) -u $(src)) \
                          && touch $@ || true
 
+DT_CHK_STYLE = $(srctree)/scripts/dtc/dt-check-style
+
+# Feed the file list to the checker via @argfile in a single Python
+# process so the ruamel.yaml import is paid once. scripts/jobserver-exec
+# claims slots from the GNU make jobserver and exposes the count via
+# $PARALLELISM, which dt-check-style picks up to size its worker pool.
+quiet_cmd_chk_style = STYLE   $(src)
+      cmd_chk_style = f=$$(mktemp) && $(find_cmd) > $$f && \
+                     $(PYTHON3) $(srctree)/scripts/jobserver-exec \
+                     $(PYTHON3) $(DT_CHK_STYLE) @$$f \
+                     && touch $@ || true; rm -f $$f
+
 quiet_cmd_mk_schema = SCHEMA  $@
       cmd_mk_schema = f=$$(mktemp) ; \
                       $(find_all_cmd) > $$f ; \
@@ -62,13 +74,16 @@ override DTC_FLAGS := \
 $(obj)/processed-schema.json: $(DT_DOCS) check_dtschema_version FORCE
        $(call if_changed,mk_schema)
 
-targets += .dt-binding.checked .yamllint.checked
+targets += .dt-binding.checked .yamllint.checked .dt-style.checked
 $(obj)/.yamllint.checked: $(DT_DOCS) $(src)/.yamllint FORCE
        $(if $(DT_SCHEMA_LINT),$(call if_changed,yamllint),)
 
 $(obj)/.dt-binding.checked: $(DT_DOCS) FORCE
        $(call if_changed,chk_bindings)
 
+$(obj)/.dt-style.checked: $(DT_DOCS) FORCE
+       $(call if_changed,chk_style)
+
 always-y += processed-schema.json
 targets += $(patsubst $(obj)/%,%, $(CHK_DT_EXAMPLES))
 targets += $(patsubst $(obj)/%.dtb,%.dts, $(CHK_DT_EXAMPLES))
@@ -82,7 +97,7 @@ dt_compatible_check: $(obj)/processed-schema.json
        $(Q)$(srctree)/scripts/dtc/dt-extract-compatibles $(srctree) | xargs dt-check-compatible -v -s $<
 
 PHONY += dt_binding_check_one
-dt_binding_check_one: $(obj)/.dt-binding.checked $(obj)/.yamllint.checked
+dt_binding_check_one: $(obj)/.dt-binding.checked $(obj)/.yamllint.checked $(obj)/.dt-style.checked
 
 PHONY += dt_binding_check
 dt_binding_check: dt_binding_check_one $(CHK_DT_EXAMPLES)