5 files changed, 11 insertions, 16 deletions

diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index ec9ae6708691..14c3f4f1b617 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
 
diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile
index bc96e2908f14..6e927cf20df2 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 674fca45f72d..6fa72dd641b2 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
-        $(call if_changed,dtc)
diff --git a/arch/mips/netlogic/dts/Makefile b/arch/mips/netlogic/dts/Makefile
index 67ae3fe296f0..d117d46413aa 100644
--- a/arch/mips/netlogic/dts/Makefile
+++ b/arch/mips/netlogic/dts/Makefile
@@ -1,4 +1 @@
 obj-$(CONFIG_DT_XLP_EVP) := xlp_evp.dtb.o
-
-$(obj)/%.dtb: $(obj)/%.dts
-        $(call if_changed,dtc)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 0be6f110cce7..bdf42fdf64c9 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 FORCE
+        $(call if_changed_dep,dtc)
+
 # Bzip2
 # ---------------------------------------------------------------------------