[RFC PATCH v2 3/3] dtc: linux kernel build process to create annotated .dts

[Frank Rowand <frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

From: Frank Rowand <frank.rowand-/MT0OVThwyLZJqsBc5GL+g@public.gmane.org>

Add a new temp file in the build directory arch/${arch}/boot/dts/
that contains the expanded device tree source with source file locations.

Requires a new version of the dtc compiler that understands the
--annotate flag.

Not-signed-off-by: Frank Rowand <frank.rowand-/MT0OVThwyLZJqsBc5GL+g@public.gmane.org>
---
 scripts/Makefile.lib |    3 +++
 1 file changed, 3 insertions(+)

Index: b/scripts/Makefile.lib
===================================================================
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -287,12 +287,15 @@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 	$(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
 		-i $(dir $<) $(DTC_FLAGS) \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
+	$(objtree)/scripts/dtc/dtc --annotate -O dts -o $(dtc-annotate-tmp) \
+		 $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
 $(obj)/%.dtb: $(src)/%.dts FORCE
 	$(call if_changed_dep,dtc)
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
+dtc-annotate-tmp = $(subst $(comma),_,$(dot-target).annotate.dts.tmp)
 
 # Bzip2
 # ---------------------------------------------------------------------------