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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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5
firmware/objects.mk
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@@ -39,6 +39,11 @@ ifdef FW_PAYLOAD_ALIGN
firmware-genflags-$(FW_PAYLOAD) += -DFW_PAYLOAD_ALIGN=$(FW_PAYLOAD_ALIGN)
endif
ifndef FW_PAYLOAD_FDT_PATH
ifdef FW_PAYLOAD_FDT
FW_PAYLOAD_FDT_PATH=$(build_dir)/$(platform_subdir)/$(FW_PAYLOAD_FDT)
endif
endif
ifdef FW_PAYLOAD_FDT_PATH
firmware-genflags-$(FW_PAYLOAD) += -DFW_PAYLOAD_FDT_PATH=$(FW_PAYLOAD_FDT_PATH)
endif