How to use the device tree for lite5200

Hello,

I want to boot PowerPC Linux 2.6.19 on my Icecube board but I didn't 
succeed yet to get lite5200.dts compiled and an appropriate image created:

   $ dtc -b0 lite5200.dts
   DTC: dts->dts  on file "lite5200.dts"
   ERROR: Missing /chosen node
   Input tree has errors

What is the procedure to make and boot an uImage for the U-Boot 
bootloader. I read about the third argument for bootm but did not 
understand how to use it.

TIA.

Wolfgang.

On Dec 6, 2006, at 9:59 AM, Wolfgang Grandegger wrote:

Hello,

I want to boot PowerPC Linux 2.6.19 on my Icecube board but I didn't
succeed yet to get lite5200.dts compiled and an appropriate image  
created:

   $ dtc -b0 lite5200.dts
   DTC: dts->dts  on file "lite5200.dts"
   ERROR: Missing /chosen node
   Input tree has errors

What is the procedure to make and boot an uImage for the U-Boot
bootloader. I read about the third argument for bootm but did not
understand how to use it.

How have you booted in the past?  Do you tftp down the images or run  
from flash?

Here's an example assuming you have a kernel image at address  
$loadaddr and the dtb at $ftaddr

dtc -b0 -Idts -Odtb -V16 lite5200.dts > lite5200.dtb

download lite5200.dtb to the system

=> bootm $loadaddr - $fdtaddr

- k

On 12/6/06, Wolfgang Grandegger [off-list ref] wrote:

   $ dtc -b0 lite5200.dts
   DTC: dts->dts  on file "lite5200.dts"
   ERROR: Missing /chosen node
   Input tree has errors

Add the -f flag to dtc to ignore the missing /chosen node error

Use the "-O dtb" flag to output a fdt blob

-- 
Grant Likely, B.Sc. P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

On 12/6/06, Grant Likely [off-list ref] wrote:

On 12/6/06, Wolfgang Grandegger [off-list ref] wrote:

quoted

   $ dtc -b0 lite5200.dts
   DTC: dts->dts  on file "lite5200.dts"
   ERROR: Missing /chosen node
   Input tree has errors

Add the -f flag to dtc to ignore the missing /chosen node error

Use the "-O dtb" flag to output a fdt blob

Oh, and like Kumar said, you need the -V 0x10 flag to generate the
correct blob version.

g.

-- 
Grant Likely, B.Sc. P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

On Wed, 2006-12-06 at 10:21, Grant Likely wrote:

quoted

Add the -f flag to dtc to ignore the missing /chosen node error

Use the "-O dtb" flag to output a fdt blob

Oh, and like Kumar said, you need the -V 0x10 flag to generate the
correct blob version.

Oh, and, -V 0x10 is the default now with a current
top-of-git DTC too.  :-)

jdl

Kumar Gala wrote:

On Dec 6, 2006, at 9:59 AM, Wolfgang Grandegger wrote:

quoted

Hello,

I want to boot PowerPC Linux 2.6.19 on my Icecube board but I didn't
succeed yet to get lite5200.dts compiled and an appropriate image 
created:

   $ dtc -b0 lite5200.dts
   DTC: dts->dts  on file "lite5200.dts"
   ERROR: Missing /chosen node
   Input tree has errors

What is the procedure to make and boot an uImage for the U-Boot
bootloader. I read about the third argument for bootm but did not
understand how to use it.

How have you booted in the past?  Do you tftp down the images or run 
from flash?

Yes, at least for development.

Here's an example assuming you have a kernel image at address $loadaddr 
and the dtb at $ftaddr

dtc -b0 -Idts -Odtb -V16 lite5200.dts > lite5200.dtb

download lite5200.dtb to the system

=> bootm $loadaddr - $fdtaddr

Great, that worked with the additional "-f" option, as suggested by 
Grant. Now I can boot the kernel but BESTCOM and FEC support seem still 
missing. Are there already patches around?

Thanks to all who replied.

Wolfgang.

On 12/6/06, Wolfgang Grandegger [off-list ref] wrote:

Great, that worked with the additional "-f" option, as suggested by
Grant. Now I can boot the kernel but BESTCOM and FEC support seem still
missing. Are there already patches around?

They are not in mainline as they are undergoing rework; I've got
working drivers in my tree.  see here:

http://git.secretlab.ca

-- 
Grant Likely, B.Sc. P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

Grant Likely wrote:

On 12/6/06, Wolfgang Grandegger [off-list ref] wrote:

quoted

Great, that worked with the additional "-f" option, as suggested by
Grant. Now I can boot the kernel but BESTCOM and FEC support seem still
missing. Are there already patches around?

They are not in mainline as they are undergoing rework; I've got
working drivers in my tree.  see here:

http://git.secretlab.ca

I already used one of your trees, but obviously the wrong one. Now it 
works, that's great.

Thanks a lot.

Wolfgang.