| Message ID | 20181203213223.16986-2-robh@kernel.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Devicetree schema | expand |
Hi Rob, On Tue, Dec 4, 2018 at 6:32 AM Rob Herring <robh@kernel.org> wrote: > > This adds the build infrastructure for checking DT binding schema > documents and validating dts files using the binding schema. > > Check DT binding schema documents: > make dt_binding_check > > Build dts files and check using DT binding schema: > make dtbs_check > > Optionally, DT_SCHEMA_FILES can passed in with a schema file(s) to use > for validation. This makes it easier to find and fix errors generated by > a specific schema. > > Currently, the validation targets are separate from a normal build to > avoid a hard dependency on the external DT schema project and because > there are lots of warnings generated. > > Cc: Jonathan Corbet <corbet@lwn.net> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Masahiro Yamada <yamada.masahiro@socionext.com> > Cc: Michal Marek <michal.lkml@markovi.net> > Cc: linux-doc@vger.kernel.org > Cc: devicetree@vger.kernel.org > Cc: linux-kbuild@vger.kernel.org > Signed-off-by: Rob Herring <robh@kernel.org> > --- > .gitignore | 1 + > Documentation/Makefile | 2 +- > Documentation/devicetree/bindings/.gitignore | 1 + > Documentation/devicetree/bindings/Makefile | 33 ++++++++++++++++++++ > Makefile | 11 +++++-- > scripts/Makefile.lib | 24 ++++++++++++-- > 6 files changed, 67 insertions(+), 5 deletions(-) > create mode 100644 Documentation/devicetree/bindings/.gitignore > create mode 100644 Documentation/devicetree/bindings/Makefile > > diff --git a/.gitignore b/.gitignore > index 97ba6b79834c..a20ac26aa2f5 100644 > --- a/.gitignore > +++ b/.gitignore > @@ -15,6 +15,7 @@ > *.bin > *.bz2 > *.c.[012]*.* > +*.dt.yaml > *.dtb > *.dtb.S > *.dwo > diff --git a/Documentation/Makefile b/Documentation/Makefile > index 2ca77ad0f238..9786957c6a35 100644 > --- a/Documentation/Makefile > +++ b/Documentation/Makefile > @@ -2,7 +2,7 @@ > # Makefile for Sphinx documentation > # > > -subdir-y := > +subdir-y := devicetree/bindings/ > > # You can set these variables from the command line. > SPHINXBUILD = sphinx-build > diff --git a/Documentation/devicetree/bindings/.gitignore b/Documentation/devicetree/bindings/.gitignore > new file mode 100644 > index 000000000000..d9194c02dd08 > --- /dev/null > +++ b/Documentation/devicetree/bindings/.gitignore > @@ -0,0 +1 @@ > +*.example.dts > diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile > new file mode 100644 > index 000000000000..ee0110dd8131 > --- /dev/null > +++ b/Documentation/devicetree/bindings/Makefile > @@ -0,0 +1,33 @@ > +# SPDX-License-Identifier: GPL-2.0 > +DT_DOC_CHECKER ?= dt-doc-validate > +DT_EXTRACT_EX ?= dt-extract-example > +DT_MK_SCHEMA ?= dt-mk-schema > +DT_MK_SCHEMA_FLAGS := $(if $(DT_SCHEMA_FILES), -u) > + > +quiet_cmd_chk_binding = CHKDT $< > + cmd_chk_binding = (set -e; \ > + $(DT_DOC_CHECKER) $< ; \ > + mkdir -p $(dir $@) ; \ > + $(DT_EXTRACT_EX) $< > $@ ) > + > +$(obj)/%.example.dts: $(src)/%.yaml FORCE > + $(call if_changed,chk_binding) > + > +DT_TMP_SCHEMA := .schema.yaml.tmp > +extra-y += $(DT_TMP_SCHEMA) > + > +quiet_cmd_mk_schema = SCHEMA $@ > + cmd_mk_schema = mkdir -p $(obj); \ > + rm -f $@; \ > + $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $< I think '$<' is wrong. '$<' is replaced with the first prerequisite. You can easily check what is happening here. $ cat Documentation/devicetree/bindings/..schema.yaml.tmp.cmd cmd_Documentation/devicetree/bindings/.schema.yaml.tmp := mkdir -p Documentation/devicetree/bindings; rm -f Documentation/devicetree/bindings/.schema.yaml.tmp; dt-mk-schema -o Documentation/devicetree/bindings/.schema.yaml.tmp Documentation/devicetree/bindings/arm/ti/ti,davinci.yaml So, the dt-validater will check only binding from ti,davinci.yaml, which is almost useless. If I understand it correctly, .schema.yaml.tmp should contain all binding yaml. I fixed it up like follows: diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile index ee0110d..267458f 100644 --- a/Documentation/devicetree/bindings/Makefile +++ b/Documentation/devicetree/bindings/Makefile @@ -19,7 +19,7 @@ extra-y += $(DT_TMP_SCHEMA) quiet_cmd_mk_schema = SCHEMA $@ cmd_mk_schema = mkdir -p $(obj); \ rm -f $@; \ - $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $< + $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $(filter-out FORCE, $^) DT_DOCS = $(shell cd $(srctree)/$(src) && find * -name '*.yaml') DT_SCHEMA_FILES ?= $(addprefix $(src)/,$(DT_DOCS)) Then, I see another error. SCHEMA Documentation/devicetree/bindings/.schema.yaml.tmp Traceback (most recent call last): File "/home/masahiro/ref/yaml-bindings/tools/dt-mk-schema", line 32, in <module> schemas = dtschema.process_schemas(args.schemas, core_schema=(not args.useronly)) File "/usr/local/lib/python3.5/dist-packages/dtschema-0.0.1-py3.5.egg/dtschema/lib.py", line 359, in process_schemas sch = process_schema(os.path.abspath(filename)) File "/usr/local/lib/python3.5/dist-packages/dtschema-0.0.1-py3.5.egg/dtschema/lib.py", line 314, in process_schema schema = load_schema(filename) File "/usr/local/lib/python3.5/dist-packages/dtschema-0.0.1-py3.5.egg/dtschema/lib.py", line 80, in load_schema return yaml.load(f.read()) File "/usr/lib/python3.5/codecs.py", line 321, in decode (result, consumed) = self._buffer_decode(data, self.errors, final) UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd0 in position 0: invalid continuation byte Documentation/devicetree/bindings/Makefile:33: recipe for target 'Documentation/devicetree/bindings/.schema.yaml.tmp' failed make[1]: *** [Documentation/devicetree/bindings/.schema.yaml.tmp] Error 1 Makefile:1278: recipe for target 'dt_binding_check' failed make: *** [dt_binding_check] Error 2 BTW, I cannot build *.dt.yaml DTC arch/arm/boot/dts/alpine-db.dt.yaml FATAL ERROR: Unknown output format "yaml" scripts/Makefile.lib:313: recipe for target 'arch/arm/boot/dts/alpine-db.dt.yaml' failed make[1]: *** [arch/arm/boot/dts/alpine-db.dt.yaml] Error 1 make[1]: *** Deleting file 'arch/arm/boot/dts/alpine-db.dt.yaml' Makefile:1262: recipe for target 'dtbs_check' failed I use linux-next. script/dtc/dtc does not understand '-O yaml' I also tried the upstream DTC project with no success. Where can I get dtc with yaml support?
On Fri, Dec 7, 2018 at 10:47 PM Masahiro Yamada <yamada.masahiro@socionext.com> wrote: > > Hi Rob, > > > On Tue, Dec 4, 2018 at 6:32 AM Rob Herring <robh@kernel.org> wrote: > > > > This adds the build infrastructure for checking DT binding schema > > documents and validating dts files using the binding schema. > > > > Check DT binding schema documents: > > make dt_binding_check > > > > Build dts files and check using DT binding schema: > > make dtbs_check > > > > Optionally, DT_SCHEMA_FILES can passed in with a schema file(s) to use > > for validation. This makes it easier to find and fix errors generated by > > a specific schema. > > > > Currently, the validation targets are separate from a normal build to > > avoid a hard dependency on the external DT schema project and because > > there are lots of warnings generated. > > > > Cc: Jonathan Corbet <corbet@lwn.net> > > Cc: Mark Rutland <mark.rutland@arm.com> > > Cc: Masahiro Yamada <yamada.masahiro@socionext.com> > > Cc: Michal Marek <michal.lkml@markovi.net> > > Cc: linux-doc@vger.kernel.org > > Cc: devicetree@vger.kernel.org > > Cc: linux-kbuild@vger.kernel.org > > Signed-off-by: Rob Herring <robh@kernel.org> > > --- > > .gitignore | 1 + > > Documentation/Makefile | 2 +- > > Documentation/devicetree/bindings/.gitignore | 1 + > > Documentation/devicetree/bindings/Makefile | 33 ++++++++++++++++++++ > > Makefile | 11 +++++-- > > scripts/Makefile.lib | 24 ++++++++++++-- > > 6 files changed, 67 insertions(+), 5 deletions(-) > > create mode 100644 Documentation/devicetree/bindings/.gitignore > > create mode 100644 Documentation/devicetree/bindings/Makefile > > > > diff --git a/.gitignore b/.gitignore > > index 97ba6b79834c..a20ac26aa2f5 100644 > > --- a/.gitignore > > +++ b/.gitignore > > @@ -15,6 +15,7 @@ > > *.bin > > *.bz2 > > *.c.[012]*.* > > +*.dt.yaml > > *.dtb > > *.dtb.S > > *.dwo > > diff --git a/Documentation/Makefile b/Documentation/Makefile > > index 2ca77ad0f238..9786957c6a35 100644 > > --- a/Documentation/Makefile > > +++ b/Documentation/Makefile > > @@ -2,7 +2,7 @@ > > # Makefile for Sphinx documentation > > # > > > > -subdir-y := > > +subdir-y := devicetree/bindings/ > > > > # You can set these variables from the command line. > > SPHINXBUILD = sphinx-build > > diff --git a/Documentation/devicetree/bindings/.gitignore b/Documentation/devicetree/bindings/.gitignore > > new file mode 100644 > > index 000000000000..d9194c02dd08 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/.gitignore > > @@ -0,0 +1 @@ > > +*.example.dts > > diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile > > new file mode 100644 > > index 000000000000..ee0110dd8131 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/Makefile > > @@ -0,0 +1,33 @@ > > +# SPDX-License-Identifier: GPL-2.0 > > +DT_DOC_CHECKER ?= dt-doc-validate > > +DT_EXTRACT_EX ?= dt-extract-example > > +DT_MK_SCHEMA ?= dt-mk-schema > > +DT_MK_SCHEMA_FLAGS := $(if $(DT_SCHEMA_FILES), -u) > > + > > +quiet_cmd_chk_binding = CHKDT $< > > + cmd_chk_binding = (set -e; \ > > + $(DT_DOC_CHECKER) $< ; \ > > + mkdir -p $(dir $@) ; \ > > + $(DT_EXTRACT_EX) $< > $@ ) > > + > > +$(obj)/%.example.dts: $(src)/%.yaml FORCE > > + $(call if_changed,chk_binding) > > + > > +DT_TMP_SCHEMA := .schema.yaml.tmp > > +extra-y += $(DT_TMP_SCHEMA) > > + > > +quiet_cmd_mk_schema = SCHEMA $@ > > + cmd_mk_schema = mkdir -p $(obj); \ > > + rm -f $@; \ > > + $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $< > > > I think '$<' is wrong. > > '$<' is replaced with the first prerequisite. Indeed. > You can easily check what is happening here. > > $ cat Documentation/devicetree/bindings/..schema.yaml.tmp.cmd > cmd_Documentation/devicetree/bindings/.schema.yaml.tmp := mkdir -p > Documentation/devicetree/bindings; rm -f > Documentation/devicetree/bindings/.schema.yaml.tmp; dt-mk-schema -o > Documentation/devicetree/bindings/.schema.yaml.tmp > Documentation/devicetree/bindings/arm/ti/ti,davinci.yaml > > > So, the dt-validater will check only binding from ti,davinci.yaml, > which is almost useless. > > > > If I understand it correctly, > .schema.yaml.tmp should contain all binding yaml. > > > I fixed it up like follows: > > diff --git a/Documentation/devicetree/bindings/Makefile > b/Documentation/devicetree/bindings/Makefile > index ee0110d..267458f 100644 > --- a/Documentation/devicetree/bindings/Makefile > +++ b/Documentation/devicetree/bindings/Makefile > @@ -19,7 +19,7 @@ extra-y += $(DT_TMP_SCHEMA) > quiet_cmd_mk_schema = SCHEMA $@ > cmd_mk_schema = mkdir -p $(obj); \ > rm -f $@; \ > - $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $< > + $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ > $(filter-out FORCE, $^) Thanks, I incorporated this fix. > > DT_DOCS = $(shell cd $(srctree)/$(src) && find * -name '*.yaml') > DT_SCHEMA_FILES ?= $(addprefix $(src)/,$(DT_DOCS)) > > > > Then, I see another error. I fixed this with this change: @@ -27,7 +27,7 @@ DT_SCHEMA_FILES ?= $(addprefix $(src)/,$(DT_DOCS)) extra-y += $(patsubst $(src)/%.yaml,%.example.dts, $(DT_SCHEMA_FILES)) extra-y += $(patsubst $(src)/%.yaml,%.example.dtb, $(DT_SCHEMA_FILES)) -$(obj)/$(DT_TMP_SCHEMA): $(addprefix $(obj)/,$(patsubst $(src)/%.yaml,%.example.dtb, $(DT_SCHEMA_FILES))) +$(obj)/$(DT_TMP_SCHEMA): | $(addprefix $(obj)/,$(patsubst $(src)/%.yaml,%.example.dtb, $(DT_SCHEMA_FILES))) $(obj)/$(DT_TMP_SCHEMA): $(addprefix $(srctree)/, $(DT_SCHEMA_FILES)) FORCE $(call if_changed,mk_schema) > > > SCHEMA Documentation/devicetree/bindings/.schema.yaml.tmp > Traceback (most recent call last): > File "/home/masahiro/ref/yaml-bindings/tools/dt-mk-schema", line 32, > in <module> > schemas = dtschema.process_schemas(args.schemas, core_schema=(not > args.useronly)) > File "/usr/local/lib/python3.5/dist-packages/dtschema-0.0.1-py3.5.egg/dtschema/lib.py", > line 359, in process_schemas > sch = process_schema(os.path.abspath(filename)) > File "/usr/local/lib/python3.5/dist-packages/dtschema-0.0.1-py3.5.egg/dtschema/lib.py", > line 314, in process_schema > schema = load_schema(filename) > File "/usr/local/lib/python3.5/dist-packages/dtschema-0.0.1-py3.5.egg/dtschema/lib.py", > line 80, in load_schema > return yaml.load(f.read()) > File "/usr/lib/python3.5/codecs.py", line 321, in decode > (result, consumed) = self._buffer_decode(data, self.errors, final) > UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd0 in position > 0: invalid continuation byte > Documentation/devicetree/bindings/Makefile:33: recipe for target > 'Documentation/devicetree/bindings/.schema.yaml.tmp' failed > make[1]: *** [Documentation/devicetree/bindings/.schema.yaml.tmp] Error 1 > Makefile:1278: recipe for target 'dt_binding_check' failed > make: *** [dt_binding_check] Error 2 > > > > > > > > BTW, I cannot build *.dt.yaml > > > > DTC arch/arm/boot/dts/alpine-db.dt.yaml > FATAL ERROR: Unknown output format "yaml" > scripts/Makefile.lib:313: recipe for target > 'arch/arm/boot/dts/alpine-db.dt.yaml' failed > make[1]: *** [arch/arm/boot/dts/alpine-db.dt.yaml] Error 1 > make[1]: *** Deleting file 'arch/arm/boot/dts/alpine-db.dt.yaml' > Makefile:1262: recipe for target 'dtbs_check' failed > > > > > I use linux-next. > > > script/dtc/dtc does not understand '-O yaml' > > > I also tried the upstream DTC project with no success. > > > Where can I get dtc with yaml support? You need libyaml and its headers. I'll try to make this a better error message. For now, libyaml is optional so we don't break everyone just building dtbs. Rob
diff --git a/.gitignore b/.gitignore index 97ba6b79834c..a20ac26aa2f5 100644 --- a/.gitignore +++ b/.gitignore @@ -15,6 +15,7 @@ *.bin *.bz2 *.c.[012]*.* +*.dt.yaml *.dtb *.dtb.S *.dwo diff --git a/Documentation/Makefile b/Documentation/Makefile index 2ca77ad0f238..9786957c6a35 100644 --- a/Documentation/Makefile +++ b/Documentation/Makefile @@ -2,7 +2,7 @@ # Makefile for Sphinx documentation # -subdir-y := +subdir-y := devicetree/bindings/ # You can set these variables from the command line. SPHINXBUILD = sphinx-build diff --git a/Documentation/devicetree/bindings/.gitignore b/Documentation/devicetree/bindings/.gitignore new file mode 100644 index 000000000000..d9194c02dd08 --- /dev/null +++ b/Documentation/devicetree/bindings/.gitignore @@ -0,0 +1 @@ +*.example.dts diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile new file mode 100644 index 000000000000..ee0110dd8131 --- /dev/null +++ b/Documentation/devicetree/bindings/Makefile @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0 +DT_DOC_CHECKER ?= dt-doc-validate +DT_EXTRACT_EX ?= dt-extract-example +DT_MK_SCHEMA ?= dt-mk-schema +DT_MK_SCHEMA_FLAGS := $(if $(DT_SCHEMA_FILES), -u) + +quiet_cmd_chk_binding = CHKDT $< + cmd_chk_binding = (set -e; \ + $(DT_DOC_CHECKER) $< ; \ + mkdir -p $(dir $@) ; \ + $(DT_EXTRACT_EX) $< > $@ ) + +$(obj)/%.example.dts: $(src)/%.yaml FORCE + $(call if_changed,chk_binding) + +DT_TMP_SCHEMA := .schema.yaml.tmp +extra-y += $(DT_TMP_SCHEMA) + +quiet_cmd_mk_schema = SCHEMA $@ + cmd_mk_schema = mkdir -p $(obj); \ + rm -f $@; \ + $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $< + +DT_DOCS = $(shell cd $(srctree)/$(src) && find * -name '*.yaml') +DT_SCHEMA_FILES ?= $(addprefix $(src)/,$(DT_DOCS)) + +extra-y += $(patsubst $(src)/%.yaml,%.example.dts, $(DT_SCHEMA_FILES)) +extra-y += $(patsubst $(src)/%.yaml,%.example.dtb, $(DT_SCHEMA_FILES)) + +$(obj)/$(DT_TMP_SCHEMA): $(addprefix $(obj)/,$(patsubst $(src)/%.yaml,%.example.dtb, $(DT_SCHEMA_FILES))) + +$(obj)/$(DT_TMP_SCHEMA): $(addprefix $(srctree)/, $(DT_SCHEMA_FILES)) FORCE + $(call if_changed,mk_schema) diff --git a/Makefile b/Makefile index 2f36db897895..ff59adf43300 100644 --- a/Makefile +++ b/Makefile @@ -1232,10 +1232,13 @@ ifneq ($(dtstree),) %.dtb: prepare3 scripts_dtc $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ -PHONY += dtbs dtbs_install +PHONY += dtbs dtbs_install dt_binding_check dtbs: prepare3 scripts_dtc $(Q)$(MAKE) $(build)=$(dtstree) +dtbs_check: prepare3 dt_binding_check + $(Q)$(MAKE) $(build)=$(dtstree) CHECK_DTBS=1 + dtbs_install: $(Q)$(MAKE) $(dtbinst)=$(dtstree) @@ -1249,6 +1252,9 @@ PHONY += scripts_dtc scripts_dtc: scripts_basic $(Q)$(MAKE) $(build)=scripts/dtc +dt_binding_check: scripts_dtc + $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings + # --------------------------------------------------------------------------- # Modules @@ -1611,7 +1617,8 @@ clean: $(clean-dirs) $(call cmd,rmfiles) @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ - -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \ + -o -name '*.ko.*' \ + -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ -o -name '*.dwo' -o -name '*.lst' \ -o -name '*.su' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 8fe4468f9bda..d1c5630ba24c 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -61,6 +61,11 @@ real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) extra-y += $(dtb-y) extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-) +ifneq ($(CHECK_DTBS),) +extra-y += $(patsubst %.dtb,%.dt.yaml, $(dtb-y)) +extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-)) +endif + # Add subdir path extra-y := $(addprefix $(obj)/,$(extra-y)) @@ -284,13 +289,28 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE quiet_cmd_dtc = DTC $@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \ $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ - $(DTC) -O dtb -o $@ -b 0 \ + $(DTC) -O $(2) -o $@ -b 0 \ $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ -d $(depfile).dtc.tmp $(dtc-tmp) ; \ cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) $(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE - $(call if_changed_dep,dtc) + $(call if_changed_dep,dtc,dtb) + +DT_CHECKER ?= dt-validate +DT_BINDING_DIR := Documentation/devicetree/bindings +DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/.schema.yaml.tmp + +quiet_cmd_dtb_check = CHECK $@ + cmd_dtb_check = $(DT_CHECKER) -p $(DT_TMP_SCHEMA) $@ ; + +define rule_dtc_dt_yaml + $(call cmd_and_fixdep,dtc,yaml) \ + $(call echo-cmd,dtb_check) $(cmd_dtb_check) +endef + +$(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE + $(call if_changed_rule,dtc_dt_yaml) dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
This adds the build infrastructure for checking DT binding schema documents and validating dts files using the binding schema. Check DT binding schema documents: make dt_binding_check Build dts files and check using DT binding schema: make dtbs_check Optionally, DT_SCHEMA_FILES can passed in with a schema file(s) to use for validation. This makes it easier to find and fix errors generated by a specific schema. Currently, the validation targets are separate from a normal build to avoid a hard dependency on the external DT schema project and because there are lots of warnings generated. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-doc@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-kbuild@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org> --- .gitignore | 1 + Documentation/Makefile | 2 +- Documentation/devicetree/bindings/.gitignore | 1 + Documentation/devicetree/bindings/Makefile | 33 ++++++++++++++++++++ Makefile | 11 +++++-- scripts/Makefile.lib | 24 ++++++++++++-- 6 files changed, 67 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/.gitignore create mode 100644 Documentation/devicetree/bindings/Makefile