[PATCH v2] scripts/Makefile.lib: increase detail for dtsi debug output

[E Shattow]

On 9/1/25 02:44, E Shattow wrote:
> Skip automatic dtsi selection if ARCH is not defined and introduce
> u_boot_dtsi_search for use with foreach method to implement the automatic
> dtsi inclusion. Increase code re-use and detail for debug output.
> 
> Detailed dtsi automatic selection debug output when DEVICE_TREE_DEBUG=1
>   - Indicate when key is undefined and skip undefined search pattern
>   - Indicate when search pattern is found or not found, and the pattern
>   - Show values of defined keys
> 
> Signed-off-by: E Shattow <e at freeshell.de>
> ---
>  scripts/Makefile.lib | 34 +++++++++++++++++++++++-----------
>  1 file changed, 23 insertions(+), 11 deletions(-)
> 
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index 5db2fbc418a..0d70868a339 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -195,21 +195,33 @@ cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
>  ld_flags       = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
>  

>  # Try these files in order to find the U-Boot-specific .dtsi include file
> +ifneq ($(strip $(ARCH)),)

I think this guarding for non-empty $(ARCH) could be changed to become:

ifneq ($(filter $(obj),dts/upstream/src/$(ARCH) arch/$(ARCH)/dts),)

it could be $(obj) or $(src) I am not sure if either is correct, but
they do seem to compile for OF_UPSTREAM and non-OF_UPSTREAM target. This
avoids the work and debug output unless actually compiling in the dts
target directory. Am I missing any detail here?

> +
>  u_boot_dtsi_loc = $(srctree)/arch/$(ARCH)/dts/
>  
> -u_boot_dtsi_options = $(strip $(wildcard $(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi) \
> -	$(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \
> -	$(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \
> -	$(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \
> +u_boot_dtsi_search = $(<) \
> +	$(CONFIG_SYS_SOC) $(CONFIG_SYS_CPU) $(CONFIG_SYS_VENDOR)
> +
> +u_boot_dtsi_pattern = $(eval x=$$(patsubst "%",%,$(i)))$(strip \
> +	$(and $(x),$(wildcard \
> +	$(u_boot_dtsi_loc)$(basename $(notdir $(x)))-u-boot.dtsi)))
> +
> +u_boot_dtsi_options = $(strip \
> +	$(foreach i,$(value u_boot_dtsi_search),$(u_boot_dtsi_pattern)) \
>  	$(wildcard $(u_boot_dtsi_loc)u-boot.dtsi))
>  
> -u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \
> -	$(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi \
> -	$(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \
> -	$(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \
> -	$(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \
> -	$(u_boot_dtsi_loc)u-boot.dtsi ... \
> -	found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!))
> +u_boot_dtsi_pattern_raw = $(eval x=$$(patsubst "%",%,$(i))) \
> +	$(i)=$(if $(x),$(and $(x),$(x) $(if $(u_boot_dtsi_pattern),,not) \
> +	found @ $(u_boot_dtsi_loc)$(basename $(notdir $(x)))-u-boot.dtsi),(undefined)) ||
> +
> +u_boot_dtsi_options_raw = $(strip \
> +	Automatic inclusion \
> +	$(or $(u_boot_dtsi_options),(undefined)) from search: \
> +	$(foreach i,$(value u_boot_dtsi_search),$(u_boot_dtsi_pattern_raw)) \
> +	u-boot.dtsi $(if $(wildcard $(u_boot_dtsi_loc)u-boot.dtsi),,not) \
> +	found @ $(u_boot_dtsi_loc)u-boot.dtsi)
> +

> +endif

And move this endif later down to insert above the 'dtc_cpp_flags  ='...
line, to encompass debugging and avoid adding dtc_cpp_flags with an
invalid generated path.

>  
>  # Uncomment for debugging
>  # This shows all the files that were considered and the one that we chose.
> 
> base-commit: e4c8b32d03d7ecffd586b7d33336603ad639d7c0

Tested at least with starfive_visionfive2_defconfig from v2025.01
(before OF_UPSTREAM) and v2025.07 (adopted OF_UPSTREAM).

-E