Hi Rob, 2018-08-22 6:55 GMT+09:00 Rob Herring <robh@xxxxxxxxxx>: > There is nothing arch specific about building dtb files other than their > location under /arch/*/boot/dts/. Keeping each arch aligned is a pain. > The dependencies and supported targets are all slightly different. > Also, a cross-compiler for each arch is needed, but really the host > compiler preprocessor is perfectly fine for building dtbs. Move the > build rules to a common location and remove the arch specific ones. This > is done in a single step to avoid warnings about overriding rules. > > The build dependencies had been a mixture of 'scripts' and/or 'prepare'. > These pull in several dependencies some of which need a target compiler > (specifically devicetable-offsets.h) and aren't needed to build dtbs. > All that is really needed is dtc, so adjust the dependencies to only be > dtc. > > This change enables support 'dtbs_install' on some arches which were > missing the target. > > Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> > Cc: Michal Marek <michal.lkml@xxxxxxxxxxx> > Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx> > Cc: Russell King <linux@xxxxxxxxxxxxxxx> > Cc: Catalin Marinas <catalin.marinas@xxxxxxx> > Cc: Will Deacon <will.deacon@xxxxxxx> > Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx> > Cc: Michal Simek <monstr@xxxxxxxxx> > Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> > Cc: Paul Burton <paul.burton@xxxxxxxx> > Cc: James Hogan <jhogan@xxxxxxxxxx> > Cc: Ley Foon Tan <lftan@xxxxxxxxxx> > Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> > Cc: Paul Mackerras <paulus@xxxxxxxxx> > Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx> > Cc: Chris Zankel <chris@xxxxxxxxxx> > Cc: Max Filippov <jcmvbkbc@xxxxxxxxx> > Cc: linux-kbuild@xxxxxxxxxxxxxxx > Cc: linux-snps-arc@xxxxxxxxxxxxxxxxxxx > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Cc: uclinux-h8-devel@xxxxxxxxxxxxxxxxxxxx > Cc: linux-mips@xxxxxxxxxxxxxx > Cc: nios2-dev@xxxxxxxxxxxxxxxxxxxxxx > Cc: linuxppc-dev@xxxxxxxxxxxxxxxx > Cc: linux-xtensa@xxxxxxxxxxxxxxxx > Signed-off-by: Rob Herring <robh@xxxxxxxxxx> > --- > Makefile | 30 ++++++++++++++++++++++++++++++ > arch/arc/Makefile | 6 ------ > arch/arm/Makefile | 20 +------------------- > arch/arm64/Makefile | 17 +---------------- > arch/c6x/Makefile | 2 -- > arch/h8300/Makefile | 11 +---------- > arch/microblaze/Makefile | 4 +--- > arch/mips/Makefile | 15 +-------------- > arch/nds32/Makefile | 2 +- > arch/nios2/Makefile | 7 ------- > arch/nios2/boot/Makefile | 4 ---- > arch/powerpc/Makefile | 3 --- > arch/xtensa/Makefile | 12 +----------- > scripts/Makefile | 1 - > scripts/Makefile.lib | 2 +- > 15 files changed, 38 insertions(+), 98 deletions(-) > > diff --git a/Makefile b/Makefile > index c13f8b85ba60..6d89e673f192 100644 > --- a/Makefile > +++ b/Makefile > @@ -1212,6 +1212,30 @@ kselftest-merge: > $(srctree)/tools/testing/selftests/*/config > +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig > > +# --------------------------------------------------------------------------- > +# Devicetree files > + > +dtstree := $(wildcard arch/$(SRCARCH)/boot/dts) > + > +ifdef CONFIG_OF_EARLY_FLATTREE > + > +%.dtb %.dtb.S %.dtb.o: | dtc I think the pipe operator is unnecessary because Kbuild will descend to $(dtstree) anyway. > + $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ > + > +PHONY += dtbs > +dtbs: | dtc Ditto. > + $(Q)$(MAKE) $(build)=$(dtstree) > + > +dtbs_install: dtbs > + $(Q)$(MAKE) $(dtbinst)=$(dtstree) > + > +all: dtbs > + > +dtc: > + $(Q)$(MAKE) $(build)=scripts/dtc > + > +endif > + arch/*/boot/dts/ are not only directories that require dtc. $ find drivers/ -name '*.dts' drivers/staging/mt7621-dts/gbpc1.dts drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dts drivers/of/unittest-data/overlay_12.dts drivers/of/unittest-data/overlay.dts drivers/of/unittest-data/overlay_5.dts drivers/of/unittest-data/overlay_bad_symbol.dts drivers/of/unittest-data/overlay_1.dts drivers/of/unittest-data/overlay_bad_phandle.dts drivers/of/unittest-data/overlay_2.dts drivers/of/unittest-data/overlay_15.dts drivers/of/unittest-data/overlay_10.dts drivers/of/unittest-data/testcases.dts drivers/of/unittest-data/overlay_6.dts drivers/of/unittest-data/overlay_13.dts drivers/of/unittest-data/overlay_4.dts drivers/of/unittest-data/overlay_9.dts drivers/of/unittest-data/overlay_3.dts drivers/of/unittest-data/overlay_8.dts drivers/of/unittest-data/overlay_7.dts drivers/of/unittest-data/overlay_11.dts drivers/of/unittest-data/overlay_0.dts drivers/of/unittest-data/overlay_base.dts drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts dtc must be built before descending into any directory. $ git clean -f -x $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- defconfig drivers/gpu/drm/rcar-du/ HOSTCC scripts/basic/fixdep HOSTCC scripts/kconfig/conf.o YACC scripts/kconfig/zconf.tab.c LEX scripts/kconfig/zconf.lex.c HOSTCC scripts/kconfig/zconf.tab.o HOSTLD scripts/kconfig/conf *** Default configuration is based on 'multi_v7_defconfig' # # configuration written to .config # scripts/kconfig/conf --syncconfig Kconfig CC kernel/bounds.s CC arch/arm/kernel/asm-offsets.s CALL scripts/checksyscalls.sh <stdin>:1332:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp] CC scripts/mod/empty.o HOSTCC scripts/mod/mk_elfconfig MKELF scripts/mod/elfconfig.h HOSTCC scripts/mod/modpost.o CC scripts/mod/devicetable-offsets.s UPD scripts/mod/devicetable-offsets.h HOSTCC scripts/mod/file2alias.o HOSTCC scripts/mod/sumversion.o HOSTLD scripts/mod/modpost HOSTCC scripts/kallsyms HOSTCC scripts/conmakehash HOSTCC scripts/sortextable HOSTCC scripts/asn1_compiler HOSTCC scripts/extract-cert CC drivers/gpu/drm/rcar-du/rcar_lvds.o AR drivers/gpu/drm/rcar-du/built-in.a CC [M] drivers/gpu/drm/rcar-du/rcar_du_crtc.o CC [M] drivers/gpu/drm/rcar-du/rcar_du_drv.o CC [M] drivers/gpu/drm/rcar-du/rcar_du_encoder.o CC [M] drivers/gpu/drm/rcar-du/rcar_du_group.o CC [M] drivers/gpu/drm/rcar-du/rcar_du_kms.o CC [M] drivers/gpu/drm/rcar-du/rcar_du_plane.o CC [M] drivers/gpu/drm/rcar-du/rcar_du_of.o make[2]: *** No rule to make target 'drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dtb', needed by 'drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dtb.S'. Stop. Makefile:1721: recipe for target 'drivers/gpu/drm/rcar-du/' failed make[1]: *** [drivers/gpu/drm/rcar-du/] Error 2 Makefile:286: recipe for target '__build_one_by_one' failed make: *** [__build_one_by_one] Error 2 > diff --git a/scripts/Makefile b/scripts/Makefile > index 61affa300d25..a716a6b10954 100644 > --- a/scripts/Makefile > +++ b/scripts/Makefile > @@ -39,7 +39,6 @@ build_unifdef: $(obj)/unifdef > subdir-$(CONFIG_MODVERSIONS) += genksyms > subdir-y += mod > subdir-$(CONFIG_SECURITY_SELINUX) += selinux > -subdir-$(CONFIG_DTC) += dtc > subdir-$(CONFIG_GDB_SCRIPTS) += gdb > > # Let clean descend into subdirs You need to 'dtc' here to clean-up scripts/dtc by "make mrproper". subdir- += basic kconfig package gcc-plugins dtc -- Best Regards Masahiro Yamada
