Re: [PATCH] [POWERPC] add target for building .dtb files

Grant Erickson wrote:

quoted

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index d57a67d..fb29f10 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile

@@ -311,6 +311,10 @@ $(obj)/treeImage.initrd.%: vmlinux $(dtstree)/%.dts

$(wrapperbits)
 $(obj)/treeImage.%: vmlinux $(dtstree)/%.dts $(wrapperbits)
$(call if_changed,wrap,treeboot-$*,$(dtstree)/$*.dts)
 
+# Rule to build device tree blobs
+$(obj)/%.dtb: $(dtstree)/%.dts $(obj)/dtc
+ $(obj)/dtc -O dtb -o $(obj)/$*.dtb -b 0 $(dtstree)/$*.dts
+

Grant,

Would it be beneficial to provide a way to have environment- or
command-line-provided DTC arguments/flags such that the oft-required '-S
<size>' and '-R <reserved>' flags can be specified? Or, are there reasonable
size and reserved defaults appropriate for all platforms that can be
specified?

These aren't required for the bootwrapper, which is the main purpose of 
the bootwrapper makefile...

FWIW, generating a blob for Haleakala/Kilauea on the PPC405EX[r] using the
above command in the patch results in complaints about lack of space for the
"CHOSEN" node in u-boot.

U-boot should be fixed to not need this.  It's ridiculous.

-Scott