Currently the enablement of OF_UPSTREAM results on the build system searching for DTs only in dts/upstream/ . There are platforms which use U-Boot specific DTBOs applied on top of U-Boot control DT during SPL stage, and source DTs for these are located in arch/$(ARCH)/dtb.
Add dedicated 'dtbos' target which builds only .dtbos and not .dtbs and in case CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS is enabled, build this target for arch/$(ARCH)/dtb to generate local U-Boot specific DTBOs.
Adjust top level Makefile so binman would search for .dtb and .dtbo in both OF_UPSTREAM specific paths and arch/$(ARCH)/dtb for the .dtbo case in case CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS is enabled.
Reviewed-by: Sumit Garg sumit.garg@linaro.org Signed-off-by: Marek Vasut marex@denx.de --- Cc: "NXP i.MX U-Boot Team" uboot-imx@nxp.com Cc: Caleb Connolly caleb.connolly@linaro.org Cc: Christoph Niedermaier cniedermaier@dh-electronics.com Cc: Fabio Estevam festevam@gmail.com Cc: Heinrich Schuchardt xypron.glpk@gmx.de Cc: Jonas Karlman jonas@kwiboo.se Cc: Lothar Rubusch l.rubusch@gmail.com Cc: Michal Simek michal.simek@amd.com Cc: Nobuhiro Iwamatsu iwamatsu@nigauri.org Cc: Rasmus Villemoes rasmus.villemoes@prevas.dk Cc: Simon Glass sjg@chromium.org Cc: Stefano Babic sbabic@denx.de Cc: Sumit Garg sumit.garg@linaro.org Cc: Tom Rini trini@konsulko.com Cc: u-boot@dh-electronics.com Cc: u-boot@lists.denx.de --- V2: Gate this functionality behind CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS V3: - Unnest CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS - Add RB from from Sumit --- NOTE: Depends on https://lore.kernel.org/u-boot/20241004001118.322531-1-marex@denx.de/ --- Makefile | 4 ++++ dts/Kconfig | 16 ++++++++++++++++ dts/Makefile | 14 +++++++++++++- scripts/Makefile.dts | 6 ++++++ 4 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile index af24de4165e..a5258e8cb3f 100644 --- a/Makefile +++ b/Makefile @@ -1375,7 +1375,11 @@ of_list := "$(ext_dtb_list)" of_list_dirs := $(dir $(EXT_DTB)) else of_list := $(CONFIG_OF_LIST) +ifneq ($(CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS),) +of_list_dirs := $(dt_dir) arch/$(ARCH)/dts +else of_list_dirs := $(dt_dir) +endif default_dt := $(if $(DEVICE_TREE),$(DEVICE_TREE),$(CONFIG_DEFAULT_DEVICE_TREE)) endif
diff --git a/dts/Kconfig b/dts/Kconfig index 569d4be338e..385058b429f 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -125,6 +125,22 @@ config OF_UPSTREAM_VENDOR help Select the vendor to build all devicetree files for.
+config OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS + bool "Build local DTBOs as fallback for DTBOs missing upstream" + default n + depends on OF_UPSTREAM + help + Enable building DTBOs from arch/$(ARCH)/dts as a fallback for + DTBOs which are not part of Linux kernel upstream yet. This is + a stopgap measure to expedite OF_UPSTREAM switch for platforms + which already have main DT in Linux kernel upstream, but still + have leftover DTBOs in U-Boot tree. + + Do not use this option, upstream your DTs and DTBOs instead. + If the upstreaming is in progress, use with utmost caution. + + If unsure, say N. + choice prompt "Provider of DTB for DT control" depends on OF_CONTROL diff --git a/dts/Makefile b/dts/Makefile index d6c2c9daf31..a879fb4e9e9 100644 --- a/dts/Makefile +++ b/dts/Makefile @@ -20,6 +20,12 @@ else dt_dir := arch/$(ARCH)/dts endif
+ifneq ($(CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS),) +local_dtbos := local-dtbos +else +local_dtbos := +endif + ifneq ($(EXT_DTB),) DTB := $(EXT_DTB) else @@ -40,7 +46,7 @@ endif
targets += dt.dtb
-$(DTB): arch-dtbs +$(DTB): arch-dtbs $(local_dtbos) $(Q)test -e $@ || ( \ echo >&2; \ echo >&2 "Device Tree Source ($@) is not correctly specified."; \ @@ -53,6 +59,12 @@ PHONY += arch-dtbs arch-dtbs: $(Q)$(MAKE) $(build)=$(dt_dir) dtbs
+ifneq ($(CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS),) +PHONY += local-dtbos +local-dtbos: + $(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbos +endif + ifeq ($(CONFIG_SPL_BUILD),y) obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o # support "out-of-tree" build for dtb-spl diff --git a/scripts/Makefile.dts b/scripts/Makefile.dts index 1fe142f2bbf..3ab67b3c247 100644 --- a/scripts/Makefile.dts +++ b/scripts/Makefile.dts @@ -21,4 +21,10 @@ PHONY += dtbs dtbs: $(addprefix $(obj)/, $(dtb-y)) @:
+ifneq ($(CONFIG_OF_UPSTREAM_INCLUDE_LOCAL_FALLBACK_DTBOS),) +PHONY += dtbos +dtbos: $(addprefix $(obj)/, $(filter-out %.dtb,$(dtb-y))) + @: +endif + clean-files := *.dtb *.dtbo */*.dtb */*.dtbo *_HS