[PATCH] kbuild: Add DTB_FILES variable for dtbs_check

[Sebastian Reichel]

Hi Nícolas,

On Tue, Nov 01, 2022 at 06:03:03PM -0400, Nícolas F. R. A. Prado wrote:
> Currently running dtbs_check compiles and runs the DT checker on all
> enabled devicetrees against all dt-bindings. This can take a long time,
> and is an unnecessary burden when just validating a new devicetree or
> changes in an existing one, with the dt-bindings unchanged.
> 
> Similarly to DT_SCHEMA_FILES for dt_binding_check, add a DTB_FILES
> variable that can be passed to the dtbs_check make command to restrict
> which devicetrees are validated.
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
> 
> ---
> Usage example:
> make dtbs_check DTB_FILES='arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dtb arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dtb'

Please add the usage example to the 'Running checks' section in
Documentation/devicetree/bindings/writing-schema.rst

-- Sebastian

>  scripts/Makefile.lib | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index ec391c6a2641..f3ac6d3632a2 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -418,9 +418,16 @@ DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m)
>  DT_BINDING_DIR := Documentation/devicetree/bindings
>  DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json
>  
> +ifeq ($(DTB_FILES),)
>  quiet_cmd_dtb =	DTC_CHK $@
>        cmd_dtb =	$(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true
>  else
> +SHOULD_CHECK_DTB = $(filter $@,$(DTB_FILES))
> +
> +quiet_cmd_dtb =	$(if $(SHOULD_CHECK_DTB),DTC_CHK,DTC) $@
> +      cmd_dtb =	$(if $(SHOULD_CHECK_DTB), $(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true , $(cmd_dtc))
> +endif
> +else
>  quiet_cmd_dtb = $(quiet_cmd_dtc)
>        cmd_dtb = $(cmd_dtc)
>  endif
> -- 
> 2.38.1
> 
> 
> -- 
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