Hi, i got a bit further and noticed, that required command is not available in uboot...this is normally part of the dtc package [1], so why is it missing in u-boot? I guess later added or dropped to reduce compile time/make porting easier...
regards Frank https://github.com/qemu/dtc/blob/master/fdtoverlay.c > Gesendet: Mittwoch, 10. Juli 2024 um 17:35 Uhr > Von: "Frank Wunderlich" <fran...@public-files.de> > An: u-boot@lists.denx.de, "Tom Rini" <tr...@konsulko.com> > Betreff: adding fdt-overlay function - help needed > > 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 > >
