linux-kernel - [PATCH v2 1/7] MIPS: Create common infrastructure for building built-in device-trees

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Date:	Wed, 27 Aug 2014 19:10:06 -0700
From:	Andrew Bresticker <abrestic@...omium.org>
To:	Ralf Baechle <ralf@...ux-mips.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Cc:	James Hogan <james.hogan@...tec.com>,
	Paul Burton <paul.burton@...tec.com>,
	David Daney <david.daney@...ium.com>,
	John Crispin <blogic@...nwrt.org>,
	Jayachandran C <jchandra@...adcom.com>,
	Qais Yousef <qais.yousef@...tec.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jonas Gorski <jogo@...nwrt.org>,
	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Andrew Bresticker <abrestic@...omium.org>
Subject: [PATCH v2 1/7] MIPS: Create common infrastructure for building built-in device-trees

In preparation for moving the device-trees to a common location,
introduce the config option BUILTIN_DTB, which can be selected by
platforms that use a device-tree built into the kernel image, and
create a Makefile to build the device-trees in arch/mips/boot/dts/.

Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
---
 arch/mips/Kconfig           | 3 +++
 arch/mips/Makefile          | 6 ++++++
 arch/mips/boot/dts/Makefile | 3 +++
 3 files changed, 12 insertions(+)
 create mode 100644 arch/mips/boot/dts/Makefile

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index df51e78..19b8aac 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2481,6 +2481,9 @@ config USE_OF
 	select OF_EARLY_FLATTREE
 	select IRQ_DOMAIN
 
+config BUILTIN_DTB
+	bool
+
 endmenu
 
 config LOCKDEP_SUPPORT
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 9336509..72cdd6a 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -324,6 +324,12 @@ endif
 
 CLEAN_FILES += vmlinux.32 vmlinux.64
 
+# device-trees
+core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
+
+%.dtb %.dtb.S %.dtb.o: | scripts
+	$(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
+
 archprepare:
 ifdef CONFIG_MIPS32_N32
 	@echo '  Checking missing-syscalls for N32'
diff --git a/arch/mips/boot/dts/Makefile b/arch/mips/boot/dts/Makefile
new file mode 100644
index 0000000..0fef69d
--- /dev/null
+++ b/arch/mips/boot/dts/Makefile
@@ -0,0 +1,3 @@
+obj-y		+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
+
+clean-files	+= */*.dtb.S
-- 
2.1.0.rc2.206.gedb03e5

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