fabien schrieb:

hi all,

After some problem with my custom board and kernel 2.6.19 about the
init process, i've moved
on 2.6.23 and that had fixed my problems. (related to this post :
http://marc.info/?l=linuxppc-embedded&m=119609022221017&w=2)
Apparently it was a problem with cpm_uart on SMC1.
(http://lkml.org/lkml/2007/9/23/99)
the patch have been integrated in 2.6.23. Now i use this kernel and
busybox works.
I want to migrated my board in powerpc branch instead of ppc (i plan
to use xenomai but in 2.6.23
there is only an adeos patch for piowerpc branch), but i see the use
of a device tree
instead of bd_t struct. I'm a bit disappointed because i also see that
older u-boot (in my case
ppcboot 1.1.5) aren't capable to pass dts to kernel.
Is there a way to keep my old bootloader to boot a powerpc branch kernel ?

please read linux/Documentation/powerpc/booting-without-of.txt

To get a cuImage, you
- need to adjust your <platform>.dts and configure your kernel to use it.
- need the latest dtc (device tree compiler),
- need the latest mkimage (from the latest u-boot tree)
- and build your cuImage by building the target zImage (make zImage)
-> your cuImage then rests in i.e. arch/powerpc/boot/cuImage.<platform>

Aside of no good documentation, I ran into the problem that the
embedded device tree doesn't get updated by the bd_t struct properly
(the mac addresses) in the latest versions of the kernel. This might be
a bug or a configuration error on my side. I didn't check yet.
U-Boot with full device tree support will hopfully fix that, when it's
out.

Regards,

-- 
Clemens Koller
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