am65x build issues

[Jan Kiszka]

Hi all,

I've noticed that building am65x_evm_a53_defconfig causes the dtbs to be
built twice, once for the main u-boot and once for the spl. This is
because of an extra dependency in mach-k3/config_secure.mk added by
508369672ca3. Why should the produced dtbs depend on the target that
produces them? Why not simply this?

diff --git a/arch/arm/mach-k3/config_secure.mk b/arch/arm/mach-k3/config_secure.mk
index 6d63c57665..cbe9b684fb 100644
--- a/arch/arm/mach-k3/config_secure.mk
+++ b/arch/arm/mach-k3/config_secure.mk
@@ -34,11 +34,8 @@ MKIMAGEFLAGS_u-boot.img_HS = -f auto -A $(ARCH) -T firmware -C none -O u-boot \
 	-n "U-Boot $(UBOOTRELEASE) for $(BOARD) board" -E \
 	$(patsubst %,-b arch/$(ARCH)/dts/%.dtb_HS,$(subst ",,$(CONFIG_OF_LIST)))

-OF_LIST_TARGETS = $(patsubst %,arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST)))
-$(OF_LIST_TARGETS): dtbs
-
 u-boot-nodtb.bin_HS: u-boot-nodtb.bin FORCE
 	$(call if_changed,k3secureimg)

-u-boot.img_HS: u-boot-nodtb.bin_HS u-boot.img $(patsubst %.dtb,%.dtb_HS,$(OF_LIST_TARGETS)) FORCE
+u-boot.img_HS: u-boot-nodtb.bin_HS u-boot.img dtbs FORCE
 	$(call if_changed,mkimage)


Disclaimer: I didn't actually test the HS path, just the unsigned build.

But also with this change, make -j remains broken for this target:

[...]
  COPY    u-boot.dtb
  MKIMAGE u-boot-dtb.img
  MKIMAGE u-boot.img
  CAT     u-boot-dtb.bin
  COPY    u-boot.bin
  CC      spl/./lib/asm-offsets.s
  CC      spl/./arch/arm/lib/asm-offsets.s
../tools/k3_fit_atf.sh \
spl/dts/k3-am654-base-board.dtb > u-boot-spl-k3.its
  LDS     spl/u-boot-spl.lds
  FDTGREP spl/dts/k3-am654-base-board.dtb
Usage: fdtgrep - extract portions from device tree
[...]

Error: Cannot open output file
make[2]: *** [../scripts/Makefile.spl:465: spl/dts/k3-am654-base-board.dtb] Error 1
make[2]: *** Waiting for unfinished jobs....


Something is fishy with dependencies here. Any ideas?

Thanks,
Jan