[PATCH] arm/dt: Add a make rule to build dtb for enabled platform

[Shawn Guo]

It's based on commit fe8e6d0b0e601ca0a63fe768d4b812d5a45a9da7
"arm/dt: Add dtb make rule" from Rob Herring.

With 'make ARCH=arm dtb', it builds Device Tree Blobs for those
platforms enabled by CONFIG.

Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
This patch works against Linaro kernel tree.  But it needs to go
through mainline review before it gets applied.

 arch/arm/Makefile      |    3 +++
 arch/arm/boot/Makefile |   14 ++++++++++++++
 2 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index d51ab6c..7fd2af9 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -292,6 +292,9 @@ zinstall uinstall install: vmlinux
 %.dtb:
 	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
 
+dtb:
+	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
+
 # We use MRPROPER_FILES and CLEAN_FILES now
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
diff --git a/arch/arm/boot/Makefile b/arch/arm/boot/Makefile
index 08fc37f..dcea984 100644
--- a/arch/arm/boot/Makefile
+++ b/arch/arm/boot/Makefile
@@ -63,6 +63,20 @@ endif
 $(obj)/%.dtb: $(src)/dts/%.dts
 	$(call cmd,dtc)
 
+dtb-$(CONFIG_MACH_HARMONY) += tegra-harmony.dtb
+dtb-$(CONFIG_MACH_MX51_BABBAGE) += mx51-babbage.dtb
+dtb-$(CONFIG_MACH_MX51_EFIKAMX) += genesi-efikamx.dtb
+dtb-$(CONFIG_MACH_MX51_EFIKASB) += genesi-efikasb.dtb
+dtb-$(CONFIG_MACH_MX53_LOCO) += mx53-loco.dtb
+dtb-$(CONFIG_MACH_OMAP3_BEAGLE) += omap3-beagle.dtb
+dtb-$(CONFIG_MACH_OMAP4_PANDA) += omap4-panda.dtb
+dtb-$(CONFIG_MACH_OVERO) += omap3-overo.dtb
+dtb-$(CONFIG_MACH_SMDKV310) += exynos4-smdkv310.dtb
+dtb-$(CONFIG_ARCH_VERSATILE_PB) += versatile-pb.dtb
+dtb-$(CONFIG_MACH_VERSATILE_AB) += versatile-ab.dtb
+
+$(obj)/dtb: $(addprefix $(obj)/, $(dtb-y))
+
 quiet_cmd_uimage = UIMAGE  $@
       cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A arm -O linux -T kernel \
 		   -C none -a $(LOADADDR) -e $(STARTADDR) \
-- 
1.7.1