[U-Boot-Users] Moving from arch/ppc to arch/powerpc

[U-Boot-Users] Moving from arch/ppc to arch/powerpc

[Richard Danter]

Hi all,

Very quick question (I hope). I have U-Boot running on a board booting
an arch/ppc kernel. The U-Boot version is pre-DTB. If I want DTB
support in U-Boot, is it just a matter of re-compiling with a newer
version of U-Boot or are there board-specific changes needed (assuming
a DTB-supported CPU in use)?

Thanks
Rich

[U-Boot-Users] Moving from arch/ppc to arch/powerpc

[Josh Boyer]

On Mon, 10 Dec 2007 09:16:41 +0000
"Richard Danter" <radanter@googlemail.com> wrote:

> Hi all,
> 
> Very quick question (I hope). I have U-Boot running on a board booting
> an arch/ppc kernel. The U-Boot version is pre-DTB. If I want DTB
> support in U-Boot, is it just a matter of re-compiling with a newer
> version of U-Boot or are there board-specific changes needed (assuming
> a DTB-supported CPU in use)?

I think Stefan has something started for U-Boot to use DTBs on PPC.
I'm not sure what the status of that is.  However, you should be able
to use an arch/powerpc kernel with the current version of U-Boot you
have.  The cuImage target for the kernel will build a kernel wrapped
with an embedded DTB.

josh

[U-Boot-Users] Moving from arch/ppc to arch/powerpc

[Vitaly Bordug]

On Mon, 10 Dec 2007 09:16:41 +0000
Richard Danter wrote:

> Hi all,
> 
> Very quick question (I hope). I have U-Boot running on a board booting
> an arch/ppc kernel. The U-Boot version is pre-DTB. If I want DTB
> support in U-Boot, is it just a matter of re-compiling with a newer
> version of U-Boot or are there board-specific changes needed (assuming
> a DTB-supported CPU in use)?
> 
it should be pretty apparent (since many fsl boards and some amcc 4xx have all necessities already).

Normally,
+#define CONFIG_OF_LIBFDT 1
+#define CONFIG_OF_BOARD_SETUP 1
+#define OF_CPU "<your CPU node>"

should be enough, if you CPU family have necessary fdt hook-ups, or you may need add a few lines to
BSP code.

> Thanks
> Rich
> 
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-- 
Sincerely, Vitaly

[U-Boot-Users] Moving from arch/ppc to arch/powerpc

[Clemens Koller]

Hi, Richard!

Richard Danter schrieb:
 > Very quick question (I hope). I have U-Boot running on a board booting
 > an arch/ppc kernel. The U-Boot version is pre-DTB. If I want DTB
 > support in U-Boot, is it just a matter of re-compiling with a newer
 > version of U-Boot or are there board-specific changes needed (assuming
 > a DTB-supported CPU in use)?

Well, if you tell us what CPU you use, it might be possible
to give you some more details about the current status.

Example: I just moved my MPC8540ads compatible board from
arch/ppc to arch/powerpc with minor difficulties (mostly due
to my lack of experience with DT's).
I don't use an DT enabled u-boot yet, but it should also be
possible to do so. I still use the kernel-embedded DT
(cuImage) target here.

Regards,

Clemens Koller
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