Hi,
i try to get overlay-merging working in uboot (for OF_UPSTREAM conversion), but
failing on missing Makefile knowledge
i have the state now, that upstream dtso get compiled to dtbo files (that
needed further changes).
now i added this from linux-tree:
#merge CONFIG_DEFAULT_DEVICE_TREE + OF_OVERLAY_LIST_BASEDT to target DTB
#manual:
# dtc -I dtb -O dts
dts/upstream/src/arm64/mediatek/mt7986a-bananapi-bpi-r3-sd.dtbo
# fdtoverlay -i dts/upstream/src/arm64/mediatek/mt7986a-bananapi-bpi-r3.dtb -o
dts/upstream/src/arm64/mediatek/mt7986a-bananapi-bpi-r3-sd.dtb
dts/upstream/src/arm64/mediatek/mt7986a-bananapi-bpi-r3-sd.dtbo
# dtc -I dtb -O dts
dts/upstream/src/arm64/mediatek/mt7986a-bananapi-bpi-r3-sd.dtb | less
#currently linux-version
quiet_cmd_fdtoverlay = DTOVL $@
cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i
$(real-prereqs)
$(multi-dtb-y): FORCE
$(call if_changed,fdtoverlay)
$(call multi_depend, $(multi-dtb-y), .dtb, -dtbs)
and created an config-option CONFIG_OF_OVERLAY_LIST_BASEDT which holds a space
separated list of the dtbo-files without path, in my test
CONFIG_DEFAULT_DEVICE_TREE="mediatek/mt7986a-bananapi-bpi-r3"
CONFIG_OF_OVERLAY_LIST_BASEDT="mt7986a-bananapi-bpi-r3-nand.dtbo
mt7986a-bananapi-bpi-r3-nor.dtbo mt7986a-bananapi-bpi-r3-sd.dtbo"
i now want the list passed to the quiet_cmd_fdtoverlay which should handle each
item and add the dtbo to a base-devicetree (like in comments above)....
maybe anyone here can help getting this to work?
if my source is needed:
https://github.com/frank-w/u-boot/commits/2024-07-bpi-ofupstream-all/
regards Frank
