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author | Sumit Garg <sumit.garg@linaro.org> | 2024-02-02 18:35:28 +0530 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2024-02-02 12:55:53 -0500 |
commit | b1ae2c6217e6ad11b006cd9d7d6dc4306b432d71 (patch) | |
tree | 47805726d66a36355a8554f50814fa501aa909da | |
parent | 3cca73d96e5d9c6974adddb07623c873fbde00a2 (diff) | |
download | u-boot-b1ae2c6217e6ad11b006cd9d7d6dc4306b432d71.zip u-boot-b1ae2c6217e6ad11b006cd9d7d6dc4306b432d71.tar.gz u-boot-b1ae2c6217e6ad11b006cd9d7d6dc4306b432d71.tar.bz2 |
dts: Add alternative location for upstream DTB builds
Allow platform owners to mirror devicetree files from devitree-rebasing
directory into dts/upstream/src/$(ARCH) (special case for arm64). Then
build then along with any *-u-boot.dtsi file present in arch/$(ARCH)/dts
directory. Also add a new Makefile for arm64.
This will help easy migration for platforms which currently are compliant
with upstream Linux kernel devicetree files.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
-rw-r--r-- | dts/Kconfig | 16 | ||||
-rw-r--r-- | dts/Makefile | 17 | ||||
-rw-r--r-- | dts/upstream/src/arm64/Makefile | 14 |
3 files changed, 44 insertions, 3 deletions
diff --git a/dts/Kconfig b/dts/Kconfig index 00c0aef..09789d3 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -85,6 +85,22 @@ config OF_LIVE enables a live tree which is available after relocation, and can be adjusted as needed. +config OF_UPSTREAM + bool "Enable use of devicetree imported from Linux kernel release" + help + Traditionally, U-Boot platforms used to have their custom devicetree + files or copy devicetree files from Linux kernel which are hard to + maintain and can usually get out-of-sync from Linux kernel. This + option enables platforms to migrate to devicetree-rebasing repo where + a regular sync will be maintained every major Linux kernel release + cycle. However, platforms can still have some custom u-boot specific + bits maintained as part of *-u-boot.dtsi files. + + Note: This option should be set in Kconfig, for the SoC as a whole. + However, newer boards whose devicetree source files haven't landed in + the dts/upstream subtree, they can override this option to have the + DT build from existing U-Boot tree location instead. + choice prompt "Provider of DTB for DT control" depends on OF_CONTROL diff --git a/dts/Makefile b/dts/Makefile index 3437e54..d6c2c9d 100644 --- a/dts/Makefile +++ b/dts/Makefile @@ -10,10 +10,20 @@ ifeq ($(DEVICE_TREE),) DEVICE_TREE := unset endif +ifeq ($(CONFIG_OF_UPSTREAM),y) +ifeq ($(CONFIG_ARM64),y) +dt_dir := dts/upstream/src/arm64 +else +dt_dir := dts/upstream/src/$(ARCH) +endif +else +dt_dir := arch/$(ARCH)/dts +endif + ifneq ($(EXT_DTB),) DTB := $(EXT_DTB) else -DTB := arch/$(ARCH)/dts/$(DEVICE_TREE).dtb +DTB := $(dt_dir)/$(DEVICE_TREE).dtb endif $(obj)/dt-$(SPL_NAME).dtb: dts/dt.dtb $(objtree)/tools/fdtgrep FORCE @@ -41,7 +51,7 @@ $(DTB): arch-dtbs PHONY += arch-dtbs arch-dtbs: - $(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbs + $(Q)$(MAKE) $(build)=$(dt_dir) dtbs ifeq ($(CONFIG_SPL_BUILD),y) obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o @@ -65,4 +75,5 @@ clean-files := dt.dtb.S # Let clean descend into dts directories subdir- += ../arch/arc/dts ../arch/arm/dts ../arch/m68k/dts ../arch/microblaze/dts \ ../arch/mips/dts ../arch/nios2/dts ../arch/powerpc/dts ../arch/riscv/dts \ - ../arch/sandbox/dts ../arch/sh/dts ../arch/x86/dts ../arch/xtensa/dts + ../arch/sandbox/dts ../arch/sh/dts ../arch/x86/dts ../arch/xtensa/dts \ + ./upstream/src/arm64 ./upstream/src/$(ARCH) diff --git a/dts/upstream/src/arm64/Makefile b/dts/upstream/src/arm64/Makefile new file mode 100644 index 0000000..9a8f6aa --- /dev/null +++ b/dts/upstream/src/arm64/Makefile @@ -0,0 +1,14 @@ +# SPDX-License-Identifier: GPL-2.0+ + +include $(srctree)/scripts/Makefile.dts + +targets += $(dtb-y) + +# Add any required device tree compiler flags here +DTC_FLAGS += -a 0x8 + +PHONY += dtbs +dtbs: $(addprefix $(obj)/, $(dtb-y)) + @: + +clean-files := */*.dtb */*.dtbo |