arm64: Add dtbs target for building all the enabled dtb files

Based on Rob Herring's patches for arch/arm, this patch adds a dtbs
target to arch/arm64/boot/Makefile.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>

2 files changed, 12 insertions, 6 deletions

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index fd3d4a1ff419..11c35995fd51 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -41,20 +41,24 @@ libs-y		:= arch/arm64/lib/ $(libs-y)
 libs-y          += $(LIBGCC)
 
 # Default target when executing plain make
-KBUILD_IMAGE := Image.gz
+KBUILD_IMAGE    := Image.gz
+KBUILD_DTBS     := dtbs
 
-all:    $(KBUILD_IMAGE)
+all:    $(KBUILD_IMAGE) $(KBUILD_DTBS)
 
 boot := arch/arm64/boot
 
 Image Image.gz: vmlinux
-        $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
+        $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
 zinstall install: vmlinux
-        $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
+        $(Q)$(MAKE) $(build)=$(boot) $@
 
-%.dtb:
-        $(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) $(boot)/dts/$@
+%.dtb: scripts
+        $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
+
+dtbs: scripts
+        $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 
 # We use MRPROPER_FILES and CLEAN_FILES now
 archclean:
@@ -63,6 +67,7 @@ archclean:
 define archhelp
   echo  '* Image.gz      - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
   echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
+  echo  '* dtbs          - Build device tree blobs for enabled boards'
   echo  '  install       - Install uncompressed kernel'
   echo  '  zinstall      - Install compressed kernel'
   echo  '                  Install using (your) ~/bin/installkernel or'
diff --git a/arch/arm64/boot/dts/.gitignore b/arch/arm64/boot/dts/.gitignore
new file mode 100644
index 000000000000..b60ed208c779
--- /dev/null
+++ b/arch/arm64/boot/dts/.gitignore
@@ -0,0 +1 @@
+*.dtb