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<frieder>
Hi, does CONFIG_OF_LIST support DT overlays?
<frieder>
say, I want to apply an overlay to the U-Boot DT before it gets passed to Linux when booting a standard distro like Debian. How would I do that?
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<mwalle>
frieder: not sure about the OF_LIST (don't think it can) but fit configs should work
<frieder>
mwalle: do you mean passing an its file with a fit description?
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<mwalle>
frieder: using the fit container (instead of individual files using booti) and its config node, iirc overlays will work there
<mwalle>
(yes booting an itb)
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<frieder>
mwalle: yes, I use a fitImage containing overlays for the kernel when I do non-EFI boot with bootm.
<frieder>
mwalle: the question is about standard distro boot via EFI and I'm not sure how it is supposed to work here as there is no separate DT for the kernel, only the U-Boot DT getting passed on.
<frieder>
actually, I barely no anything about how the EFI boot works... :(
<mwalle>
frieder: not sure how complete that archive is. At least my reply is missing. probably because it's not an open list (?)
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<frieder>
mwalle: thanks, that seems like an interesting discussion
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<xypron>
frieder: The boot manager used to look for an OS provided device-tree in /dtb of the ESP but that got lost since the 2024.01 release. Patch series https://lore.kernel.org/u-boot/20240610164140.GQ68077@bill-the-cat/T/#t has been merged into the next tree to resurrect the functionality. Additionally you will be able to specify the device-tree in the boot options.
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<qschulz>
sjg1: (for me at least). I ran bootflow scan -l followed by bootflow menu -t (got curious what bootflow menu was supposed to do :) )
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<qschulz>
sjg1: removing CONFIG_BOOTMETH_EFI_BOOTMGR and CONFIG_BOOTMETH_EFILOADER made it work
<qschulz>
well, not crash :)
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<sjg1>
qschulz: Oh yes, it cannot show media with BOOTMETHF_GLOBAL bootmeths. So that needs fixing along with the comment for @dev in struct bootflow
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<qschulz>
sjg1: ok, tried something, didn't understand much of what I did but it works now :)
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<Tartarus>
Do we have some clever way to use say dtoc to replace CFG_SYS_SDRAM_BASE with the first location described in /memory of the first DTS used by a board?