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Date: Mon, 12 Nov 2012 13:58:26 -0700
From: Stephen Warren <swarren@...dotorg.org>
To: Michal Marek <mmarek@...e.cz>
Cc: David Gibson <david@...son.dropbear.id.au>,
Jon Loeliger <jdl@....com>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Scott Wood <scottwood@...escale.com>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org,
devicetree-discuss@...ts.ozlabs.org, linux-arch@...r.kernel.org,
Stephen Warren <swarren@...dia.com>,
Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH V6 1/2] kbuild: centralize .dts->.dtb rule
From: Stephen Warren <swarren@...dia.com>
All architectures that use cmd_dtc do so in the same way. Move the build
rule to a central location to avoid duplication.
Update Documentation/kbuild to remove the explicit call to cmd_dtc from
the example, now that the rule exists in a centralized location, and in
fact replace the example with a couple that still exist.
arch/mips changes courtesy of Ralf Baechle.
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Signed-off-by: Stephen Warren <swarren@...dia.com>
Acked-by: Sam Ravnborg <sam@...nborg.org>
---
v6: Added arch/{arm64,microblaze,mips} updates.
v5: Updated Documentation/kbuild.
v4: No change.
v3: No change.
v2: New patch.
---
Documentation/kbuild/makefiles.txt | 21 +++++++++++++++------
arch/arm/boot/Makefile | 4 ----
arch/arm64/boot/Makefile | 3 ---
arch/c6x/boot/Makefile | 3 ---
arch/microblaze/boot/Makefile | 3 ---
arch/mips/cavium-octeon/Makefile | 3 ---
arch/mips/lantiq/dts/Makefile | 3 ---
arch/mips/netlogic/dts/Makefile | 3 ---
arch/openrisc/boot/Makefile | 3 ---
arch/powerpc/boot/Makefile | 4 ----
scripts/Makefile.lib | 3 +++
11 files changed, 18 insertions(+), 35 deletions(-)
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index ec9ae67..a0b0671 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -1175,15 +1175,24 @@ 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().
+ To use this command, simply add *.dtb into obj-y or targets, or make
+ some other target depend on %.dtb
+
+ A central rule exists to create $(obj)/%.dtb from $(src)/dts/%.dts;
+ architecture Makefiles do no need to explicitly write out that rule.
+
Example:
- #arch/x86/platform/ce4100/Makefile
- clean-files := *dtb.S
+ #arch/arm/boot/Makefile
+ targets += $(dtb-y)
+ clean-files := *.dtb
+
+ #arch/powerpc/boot/Makefile
+ DTC_FLAGS ?= -p 1024
- DTC_FLAGS := -p 1024
- obj-y += foo.dtb.o
+ $(obj)/dtbImage.%: vmlinux $(wrapperbits) $(obj)/%.dtb
+ $(call if_changed,wrap,$*,,$(obj)/$*.dtb)
- $(obj)/%.dtb: $(src)/%.dts
- $(call cmd,dtc)
+ clean-files += ... *.dtb
--- 6.8 Custom kbuild commands
diff --git a/arch/arm/boot/Makefile b/arch/arm/boot/Makefile
index f2aa09e..208bb4c 100644
--- a/arch/arm/boot/Makefile
+++ b/arch/arm/boot/Makefile
@@ -61,10 +61,6 @@ endif
targets += $(dtb-y)
-# Rule to build device tree blobs
-$(obj)/%.dtb: $(src)/dts/%.dts FORCE
- $(call if_changed_dep,dtc)
-
$(obj)/dtbs: $(addprefix $(obj)/, $(dtb-y))
clean-files := *.dtb
diff --git a/arch/arm64/boot/Makefile b/arch/arm64/boot/Makefile
index eca209b..20048be 100644
--- a/arch/arm64/boot/Makefile
+++ b/arch/arm64/boot/Makefile
@@ -22,9 +22,6 @@ $(obj)/Image: vmlinux FORCE
$(obj)/Image.gz: $(obj)/Image FORCE
$(call if_changed,gzip)
-$(obj)/%.dtb: $(src)/dts/%.dts
- $(call cmd,dtc)
-
install: $(obj)/Image
$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
$(obj)/Image System.map "$(INSTALL_PATH)"
diff --git a/arch/c6x/boot/Makefile b/arch/c6x/boot/Makefile
index 6891257..ad605fb 100644
--- a/arch/c6x/boot/Makefile
+++ b/arch/c6x/boot/Makefile
@@ -12,9 +12,6 @@ ifneq ($(DTB),)
obj-y += linked_dtb.o
endif
-$(obj)/%.dtb: $(src)/dts/%.dts FORCE
- $(call if_changed_dep,dtc)
-
quiet_cmd_cp = CP $< $@$2
cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)
diff --git a/arch/microblaze/boot/Makefile b/arch/microblaze/boot/Makefile
index fa83ea4..226da18 100644
--- a/arch/microblaze/boot/Makefile
+++ b/arch/microblaze/boot/Makefile
@@ -48,7 +48,4 @@ $(obj)/simpleImage.%: vmlinux FORCE
# Rule to build device tree blobs
DTC_FLAGS := -p 1024
-$(obj)/%.dtb: $(src)/dts/%.dts FORCE
- $(call if_changed_dep,dtc)
-
clean-files += *.dtb simpleImage.*.unstrip linux.bin.ub
diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile
index bc96e29..6e927cf 100644
--- a/arch/mips/cavium-octeon/Makefile
+++ b/arch/mips/cavium-octeon/Makefile
@@ -24,9 +24,6 @@ DTB_FILES = $(patsubst %.dts, %.dtb, $(DTS_FILES))
obj-y += $(patsubst %.dts, %.dtb.o, $(DTS_FILES))
-$(obj)/%.dtb: $(src)/%.dts FORCE
- $(call if_changed_dep,dtc)
-
# Let's keep the .dtb files around in case we want to look at them.
.SECONDARY: $(addprefix $(obj)/, $(DTB_FILES))
diff --git a/arch/mips/lantiq/dts/Makefile b/arch/mips/lantiq/dts/Makefile
index 674fca4..6fa72dd 100644
--- a/arch/mips/lantiq/dts/Makefile
+++ b/arch/mips/lantiq/dts/Makefile
@@ -1,4 +1 @@
obj-$(CONFIG_DT_EASY50712) := easy50712.dtb.o
-
-$(obj)/%.dtb: $(obj)/%.dts
- $(call if_changed,dtc)
diff --git a/arch/mips/netlogic/dts/Makefile b/arch/mips/netlogic/dts/Makefile
index 67ae3fe..d117d46 100644
--- a/arch/mips/netlogic/dts/Makefile
+++ b/arch/mips/netlogic/dts/Makefile
@@ -1,4 +1 @@
obj-$(CONFIG_DT_XLP_EVP) := xlp_evp.dtb.o
-
-$(obj)/%.dtb: $(obj)/%.dts
- $(call if_changed,dtc)
diff --git a/arch/openrisc/boot/Makefile b/arch/openrisc/boot/Makefile
index 0995835..fd329bd 100644
--- a/arch/openrisc/boot/Makefile
+++ b/arch/openrisc/boot/Makefile
@@ -10,6 +10,3 @@ obj-y += $(BUILTIN_DTB)
clean-files := *.dtb.S
#DTC_FLAGS ?= -p 1024
-
-$(obj)/%.dtb: $(src)/dts/%.dts FORCE
- $(call if_changed_dep,dtc)
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 6a15c96..90206f2 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -356,10 +356,6 @@ $(obj)/treeImage.initrd.%: vmlinux $(obj)/%.dtb $(wrapperbits)
$(obj)/treeImage.%: vmlinux $(obj)/%.dtb $(wrapperbits)
$(call if_changed,wrap,treeboot-$*,,$(obj)/$*.dtb)
-# Rule to build device tree blobs
-$(obj)/%.dtb: $(src)/dts/%.dts FORCE
- $(call if_changed_dep,dtc)
-
# If there isn't a platform selected then just strip the vmlinux.
ifeq (,$(image-y))
image-y := vmlinux.strip
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 0be6f11..425578e 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -266,6 +266,9 @@ $(obj)/%.dtb.S: $(obj)/%.dtb
quiet_cmd_dtc = DTC $@
cmd_dtc = $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) -d $(depfile) $<
+$(obj)/%.dtb: $(src)/dts/%.dts FORCE
+ $(call if_changed_dep,dtc)
+
# Bzip2
# ---------------------------------------------------------------------------
--
1.7.0.4
--
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