[PATCH v2] arm/dt: Add a make rule to build dtb for enabled boards

[Shawn Guo]

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

Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
It's based on commit fe8e6d0b0e601ca0a63fe768d4b812d5a45a9da7
"arm/dt: Add dtb make rule" from Rob Herring.  And it works against
Linaro kernel tree.  But it needs to go through mainline review
before it gets applied.

Changes since v1:
* Take suggestion from Rob Herring to move .dts dection into machine
  sepcific Makefile.boot, so that arch/arm/boot/Makefile can be as
  clean as it is.

 arch/arm/Makefile                     |    3 +++
 arch/arm/boot/Makefile                |    2 ++
 arch/arm/mach-exynos4/Makefile.boot   |    2 ++
 arch/arm/mach-mx5/Makefile.boot       |    5 +++++
 arch/arm/mach-omap2/Makefile.boot     |    4 ++++
 arch/arm/mach-tegra/Makefile.boot     |    2 ++
 arch/arm/mach-versatile/Makefile.boot |    2 ++
 7 files changed, 20 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..ce39850 100644
--- a/arch/arm/boot/Makefile
+++ b/arch/arm/boot/Makefile
@@ -63,6 +63,8 @@ endif
 $(obj)/%.dtb: $(src)/dts/%.dts
 	$(call cmd,dtc)
 
+$(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 $(STARTADDR) \
diff --git a/arch/arm/mach-exynos4/Makefile.boot b/arch/arm/mach-exynos4/Makefile.boot
index d65956f..fcee6b5 100644
--- a/arch/arm/mach-exynos4/Makefile.boot
+++ b/arch/arm/mach-exynos4/Makefile.boot
@@ -1,2 +1,4 @@
    zreladdr-y	:= 0x40008000
 params_phys-y	:= 0x40000100
+
+dtb-$(CONFIG_MACH_SMDKV310) += exynos4-smdkv310.dtb
diff --git a/arch/arm/mach-mx5/Makefile.boot b/arch/arm/mach-mx5/Makefile.boot
index e928be1..4111462 100644
--- a/arch/arm/mach-mx5/Makefile.boot
+++ b/arch/arm/mach-mx5/Makefile.boot
@@ -7,3 +7,8 @@ initrd_phys-$(CONFIG_ARCH_MX51)	:= 0x90800000
    zreladdr-$(CONFIG_ARCH_MX53)	:= 0x70008000
 params_phys-$(CONFIG_ARCH_MX53)	:= 0x70000100
 initrd_phys-$(CONFIG_ARCH_MX53)	:= 0x70800000
+
+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
diff --git a/arch/arm/mach-omap2/Makefile.boot b/arch/arm/mach-omap2/Makefile.boot
index 565aff7..0f54901 100644
--- a/arch/arm/mach-omap2/Makefile.boot
+++ b/arch/arm/mach-omap2/Makefile.boot
@@ -1,3 +1,7 @@
   zreladdr-y		:= 0x80008000
 params_phys-y		:= 0x80000100
 initrd_phys-y		:= 0x80800000
+
+dtb-$(CONFIG_MACH_OMAP3_BEAGLE) += omap3-beagle.dtb
+dtb-$(CONFIG_MACH_OMAP4_PANDA) += omap4-panda.dtb
+dtb-$(CONFIG_MACH_OVERO) += omap3-overo.dtb
diff --git a/arch/arm/mach-tegra/Makefile.boot b/arch/arm/mach-tegra/Makefile.boot
index db52d61..c98addf 100644
--- a/arch/arm/mach-tegra/Makefile.boot
+++ b/arch/arm/mach-tegra/Makefile.boot
@@ -1,3 +1,5 @@
 zreladdr-$(CONFIG_ARCH_TEGRA_2x_SOC)	:= 0x00008000
 params_phys-$(CONFIG_ARCH_TEGRA_2x_SOC)	:= 0x00000100
 initrd_phys-$(CONFIG_ARCH_TEGRA_2x_SOC)	:= 0x00800000
+
+dtb-$(CONFIG_MACH_HARMONY) += tegra-harmony.dtb
diff --git a/arch/arm/mach-versatile/Makefile.boot b/arch/arm/mach-versatile/Makefile.boot
index c7e75ac..e2227d3 100644
--- a/arch/arm/mach-versatile/Makefile.boot
+++ b/arch/arm/mach-versatile/Makefile.boot
@@ -2,3 +2,5 @@
 params_phys-y	:= 0x00000100
 initrd_phys-y	:= 0x00800000
 
+dtb-$(CONFIG_ARCH_VERSATILE_PB) += versatile-pb.dtb
+dtb-$(CONFIG_MACH_VERSATILE_AB) += versatile-ab.dtb
-- 
1.7.1