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Makefile: Add support for device tree compilation

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Add rules to compile dts files into dtb files using the device tree
compiler (dtc). A platform can specify the DTS file to compile using
the platform-dtb-y variable. The flattened device tree binary file to be
used for building the final polatform firmware can be specified using
the new FW_PAYLOAD_FDT firmware configuration option to point to the
automatically compiled FDT file. Using the existing FW_PAYLOAD_FDT_PATH
configuration option is still possible and will take precedence over
the FW_PAYLOAD_FDT definition.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
This commit is contained in:
Damien Le Moal
2019-01-18 15:49:37 +09:00
committed by Anup Patel
parent f4373731e3
commit 0df8269477
4 changed files with 25 additions and 0 deletions
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11
Makefile
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@@ -79,6 +79,7 @@ include $(firmware-object-mks)
lib-objs-path-y=$(foreach obj,$(lib-objs-y),$(build_dir)/lib/$(obj))
ifdef PLATFORM
platform-objs-path-y=$(foreach obj,$(platform-objs-y),$(build_dir)/$(platform_subdir)/$(obj))
platform-dtb-path-y=$(foreach obj,$(platform-dtb-y),$(build_dir)/$(platform_subdir)/$(obj))
platform-common-objs-path-y=$(foreach obj,$(platform-common-objs-y),$(build_dir)/platform/common/$(obj))
firmware-bins-path-y=$(foreach bin,$(firmware-bins-y),$(build_dir)/$(platform_subdir)/firmware/$(bin))
endif
@@ -154,6 +155,9 @@ else
OBJCOPY ?= objcopy
endif
DTC = dtc
DTCFLAGS = -O dtb
# Setup functions for compilation
define dynamic_flags
-I$(shell dirname $(2)) -D__OBJNAME__=$(subst -,_,$(shell basename $(1) .o))
@@ -212,10 +216,14 @@ compile_ar = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
compile_objcopy = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
echo " OBJCOPY $(subst $(build_dir)/,,$(1))"; \
$(OBJCOPY) -S -O binary $(2) $(1)
compile_dts = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
echo " DTC $(subst $(build_dir)/,,$(1))"; \
$(DTC) $(DTCFLAGS) -o $(1) $(2)
targets-y = $(build_dir)/lib/libsbi.a
ifdef PLATFORM
targets-y += $(build_dir)/$(platform_subdir)/lib/libplatsbi.a
targets-y += $(platform-dtb-path-y)
endif
targets-y += $(firmware-bins-path-y)
@@ -265,6 +273,9 @@ $(build_dir)/$(platform_subdir)/%.dep: $(src_dir)/%.S
$(build_dir)/$(platform_subdir)/%.o: $(src_dir)/%.S
$(call compile_as,$@,$<)
$(build_dir)/%.dtb: $(src_dir)/%.dts
$(call compile_dts,$@,$<)
# Rule for "make docs"
$(build_dir)/docs/latex/refman.pdf: $(build_dir)/docs/latex/refman.tex
$(CMD_PREFIX)mkdir -p $(build_dir)/docs