[U-Boot-Users] fdt in u-boot
Jerry Van Baren
gerald.vanbaren at smiths-aerospace.com
Tue Aug 14 14:34:24 CEST 2007
Kumar Gala wrote:
> Jerry,
>
> I was wondering if you wouldn't mind summarizing the state of the
> fdt/libfdt work. I haven't been following what's been going on here in
> u-boot.
>
> thanks
>
> - k
Hi Kumar,
I try to keep the wiki page up to date, I've updated it in response to
your query:
<http://www.denx.de/wiki/UBoot/UBootFdtInfo>
(it is linked off the Custodian page:)
<http://www.denx.de/wiki/UBoot/Custodians>
LIBFDT is in good shape in general, quite usable (send patches if I
lie...). The #1 outstanding task as I see it is to convert the board-,
CPU-, and PCI-specific ft_*() fdt initialization/update routines over to
to use libfdt. Patches for these improvements would go to the
appropriate 8Yxx maintainer's repositories {Kim|Andy|Jon}.
Outstanding Patches:
--------------------
* Andy Fleming's patch WRT making sure the blob is in the lower
portion (16GB at the moment) of memory. Discussion has been resolved,
it will be applied and a pull request will go out tonight (Wolfgang's
tomorrow ;-).
* Unpublished patch of JerryVanBaren, implementing a suggestion by
Scott Wood to make the /chosen handling finer grained: if the /chosen
node exists, currently u-boot-fdt bails out. A better methodology is to
not overwrite pre-existing properties on a per-property basis, so if
/chosen exists but a necessary /chosen/property doesn't, it gets
created. Good idea, but not published and poorly tested at the moment.
CPU sub-architectures:
----------------------
See the table(and update or send me updates):
<http://www.denx.de/wiki/UBoot/UBootFdtInfo#AdoptionTable>
83xx: mpc8360emds is converted (my eval board). Kim has done work on
834x board(s) but I'm not sure which ones have been converted off-hand.
86xx: Jon has said he has a note on his whiteboard to convert the 86xx
over to using LIBFDT.
85xx: Unknown. Andy is the maintainer and has submitted patch(es) so
there obviously is some activity there.
Best regards,
gvb
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