[U-Boot-Users] fdt in u-boot

[Jerry Van Baren <gerald.vanbaren@smiths-aerospace.com>]

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    * Unpublished patch of JerryVanBaren, implementing a suggestion by 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