From 90b335fbbc316b58a0daee8ea792b5aa8903f2ae Mon Sep 17 00:00:00 2001 From: Stephen Warren <swarren@nvidia.com> Date: Tue, 27 Nov 2012 16:29:10 -0700 Subject: kbuild: centralize .dts->.dtb rule All architectures that use cmd_dtc do so in almost the same way. Create a central build rule to avoid duplication. The one difference is that most current uses of dtc build $(obj)/%.dtb from $(src)/dts/%.dts rather than building the .dtb in the same directory as the .dts file. This difference will be eliminated arch-by-arch in future patches. MIPS is the exception here; it already uses the exact same rule as the new common rule, so the duplicate is removed in this patch to avoid any conflict. arch/mips changes courtesy of Ralf Baechle. Update Documentation/kbuild to remove the explicit call to cmd_dtc from the example, now that the rule exists in a centralized location. Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-arm-kernel@lists.infradead.org Cc: Olof Johansson <olof@lixom.net> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: linux@lists.openrisc.net Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: linux-c6x-dev@linux-c6x.org Cc: Mark Salter <msalter@redhat.com> Cc: Michal Simek <monstr@monstr.eu> Cc: microblaze-uclinux@itee.uq.edu.au Cc: Chris Zankel <chris@zankel.net> Cc: linux-xtensa@linux-xtensa.org Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com> --- Documentation/kbuild/makefiles.txt | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'Documentation/kbuild/makefiles.txt') diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index ec9ae670869..14c3f4f1b61 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -1175,15 +1175,16 @@ When kbuild executes, the following steps are followed (roughly): in an init section in the image. Platform code *must* copy the blob to non-init memory prior to calling unflatten_device_tree(). - Example: - #arch/x86/platform/ce4100/Makefile - clean-files := *dtb.S + To use this command, simply add *.dtb into obj-y or targets, or make + some other target depend on %.dtb - DTC_FLAGS := -p 1024 - obj-y += foo.dtb.o + A central rule exists to create $(obj)/%.dtb from $(src)/%.dts; + architecture Makefiles do no need to explicitly write out that rule. - $(obj)/%.dtb: $(src)/%.dts - $(call cmd,dtc) + Example: + targets += $(dtb-y) + clean-files += *.dtb + DTC_FLAGS ?= -p 1024 --- 6.8 Custom kbuild commands -- cgit v1.2.3-18-g5258