dts, kbuild: Factor out dtbs install rules to Makefile.dtbinst

Move dtbs install rules to Makefile.dtbinst. This change is needed to
implement support for dts vendor subdirs. The change makes Makefiles
easier and smaller as no longer the dtbs_install rule needs to be
defined. Another advantage is that install goals are not encoded in
targets anymore (%.dtb_dtbinst_).

Signed-off-by: Robert Richter <rrichter@cavium.com>

7 files changed, 54 insertions, 18 deletions

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 034a94904d6..c81e0674e56 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -312,9 +312,13 @@ $(INSTALL_TARGETS):
 	$(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) $(boot)/dts/$@
 
 PHONY += dtbs dtbs_install
-dtbs dtbs_install: prepare scripts
+
+dtbs: prepare scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) $@
 
+dtbs_install:
+	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts MACHINE=$(MACHINE)
+
 # We use MRPROPER_FILES and CLEAN_FILES now
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 38c89cafa1a..e0d348b4d1f 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -527,5 +527,3 @@ dtbs: $(addprefix $(obj)/, $(dtb-y))
 	$(Q)rm -f $(obj)/../*.dtb
 
 clean-files := *.dtb
-
-dtbs_install: $(addsuffix _dtbinst_, $(dtb-y))
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index a963b3a8fc3..8e9167a19b6 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -71,9 +71,13 @@ zinstall install: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 
 PHONY += dtbs dtbs_install
-dtbs dtbs_install: prepare scripts
+
+dtbs: prepare scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts $@
 
+dtbs_install:
+	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
+
 PHONY += vdso_install
 vdso_install:
 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index 3a75cdc2d08..29ac5adf50a 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -8,5 +8,3 @@ targets += $(dtb-y)
 dtbs: $(addprefix $(obj)/, $(dtb-y))
 
 clean-files := *.dtb
-
-dtbs_install: $(addsuffix _dtbinst_, $(dtb-y))
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 65e7b08bb2c..5374b1bdf02 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -179,6 +179,12 @@ build := -f $(srctree)/scripts/Makefile.build obj
 # $(Q)$(MAKE) $(modbuiltin)=dir
 modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
 
+###
+# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
+# Usage:
+# $(Q)$(MAKE) $(dtbinst)=dir
+dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj
+
 # Prefix -I with $(srctree) if it is not an absolute path.
 # skip if -I has no parameter
 addtree = $(if $(patsubst -I%,%,$(1)), \
diff --git a/scripts/Makefile.dtbinst b/scripts/Makefile.dtbinst
new file mode 100644
index 00000000000..54286cccc28
--- /dev/null
+++ b/scripts/Makefile.dtbinst
@@ -0,0 +1,38 @@
+# ==========================================================================
+# Installing dtb files
+#
+# Installs all dtb files listed in $(dtb-y) either in the
+# INSTALL_DTBS_PATH directory or the default location:
+#
+#   $INSTALL_PATH/dtbs/$KERNELRELEASE
+#
+# ==========================================================================
+
+src := $(obj)
+
+PHONY := __dtbs_install
+__dtbs_install:
+
+include include/config/auto.conf
+include scripts/Kbuild.include
+include $(srctree)/$(obj)/Makefile
+
+PHONY += __dtbs_install_prep
+__dtbs_install_prep:
+	$(Q)if [ -d $(INSTALL_DTBS_PATH).old ]; then rm -rf $(INSTALL_DTBS_PATH).old; fi
+	$(Q)if [ -d $(INSTALL_DTBS_PATH) ]; then mv $(INSTALL_DTBS_PATH) $(INSTALL_DTBS_PATH).old; fi
+	$(Q)mkdir -p $(INSTALL_DTBS_PATH)
+
+dtbinst-files	:= $(dtb-y)
+
+# Helper targets for Installing DTBs into the boot directory
+quiet_cmd_dtb_install =	INSTALL $<
+      cmd_dtb_install =	cp $< $(2)
+
+$(dtbinst-files): %.dtb: $(obj)/%.dtb | __dtbs_install_prep
+	$(call cmd,dtb_install,$(INSTALL_DTBS_PATH))
+
+PHONY += $(dtbinst-files)
+__dtbs_install: $(dtbinst-files)
+
+.PHONY: $(PHONY)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 54be19a0fa5..51175520063 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -283,18 +283,6 @@ $(obj)/%.dtb: $(src)/%.dts FORCE
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
-# Helper targets for Installing DTBs into the boot directory
-quiet_cmd_dtb_install =	INSTALL $<
-      cmd_dtb_install =	cp $< $(2)
-
-_dtbinst_pre_:
-	$(Q)if [ -d $(INSTALL_DTBS_PATH).old ]; then rm -rf $(INSTALL_DTBS_PATH).old; fi
-	$(Q)if [ -d $(INSTALL_DTBS_PATH) ]; then mv $(INSTALL_DTBS_PATH) $(INSTALL_DTBS_PATH).old; fi
-	$(Q)mkdir -p $(INSTALL_DTBS_PATH)
-
-%.dtb_dtbinst_: $(obj)/%.dtb _dtbinst_pre_
-	$(call cmd,dtb_install,$(INSTALL_DTBS_PATH))
-
 # Bzip2
 # ---------------------------------------------------------------------------