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scripts: Makefile: add support to compile DT overlay blobs

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Add support to compile device tree overlay blob.
'dtbo-y' target can be used to specify DT overlay blob.
'<target>-obj'  must be specified to list base and overlay blobs.

Change-Id: Ib5036c70ba46374619cc43f9f7b697e1a444aebf
Signed-off-by: Puja Gupta <pujag@codeaurora.org>
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
[eberman@codeaurora.org: Resolve merge conflicts]
Signed-off-by: Elliot Bermna <eberman@codeaurora.org>
This commit is contained in:
Puja Gupta 2017-02-10 14:52:32 -08:00 • committed by Elliot Berman
commit 5d5044069e
3 changed files with 32 additions and 2 deletions
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5
scripts/Makefile.build
View file

@ -48,6 +48,11 @@ ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(h
include scripts/Makefile.host
endif
# Do not include host rules unless needed
ifneq ($(dtbo-y),)
include scripts/Makefile.dtbo
endif
ifndef obj
$(warning kbuild: Makefile.build is included improperly)
endif

25
scripts/Makefile.dtbo Normal file
View file

@ -0,0 +1,25 @@
# SPDX-License-Identifier: GPL-2.0-only
__dtbo := $(sort $(dtbo-y))
dtbo-base := $(sort $(foreach m,$(__dtbo),$($(m)-base)))
dtbo := $(foreach m,$(__dtbo),$(if $($(m)-base),$(m)))
__dtbo := $(addprefix $(obj)/,$(__dtbo))
dtbo-base := $(addprefix $(obj)/,$(dtbo-base))
dtbo := $(addprefix $(obj)/,$(dtbo))
ifneq ($(DTC_OVERLAY_TEST_EXT),)
DTC_OVERLAY_TEST = $(DTC_OVERLAY_TEST_EXT)
quiet_cmd_dtbo_verify = VERIFY $@
cmd_dtbo_verify = $(DTC_OVERLAY_TEST) $(addprefix $(obj)/,$($(@F)-base)) $@ $(dot-target).dtb
else
cmd_dtbo_verify = true
endif
$(obj)/%.dtbo: $(src)/%.dts FORCE
$(call if_changed_dep,dtc,dtb,-@)
$(call if_changed,dtbo_verify)
$(call multi_depend, $(dtbo), , -base)
always += $(dtbo)

4
scripts/Makefile.lib
View file

@ -291,12 +291,12 @@ quiet_cmd_dtc = DTC $@
cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
$(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
$(DTC) -O $(2) -o $@ -b 0 \
$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(3) $(DTC_FLAGS) \
-d $(depfile).dtc.tmp $(dtc-tmp) ; \
cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
$(call if_changed_dep,dtc,dtb)
$(call if_changed_dep,dtc,dtb,-@)
DT_CHECKER ?= dt-validate
DT_BINDING_DIR := Documentation/devicetree/bindings