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>

3 files changed, 44 insertions, 12 deletions

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 65e7b08bb2cc..5374b1bdf02f 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 000000000000..54286cccc289
--- /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 54be19a0fa51..511755200634 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
 # ---------------------------------------------------------------------------