Device tree for powerpc boards.

[Leonid]

Hi, Jon:

Thanks a lot for your explanation.

Leonid. 

-----Original Message-----
From: Jon Loeliger [mailto:jdl at freescale.com] 
Sent: Friday, June 13, 2008 10:50 AM
To: Leonid
Cc: linuxppc-embedded at ozlabs.org
Subject: Re: Device tree for powerpc boards.

Leonid wrote:
> Hi:

Hi.

> 1) Is the usage of device tree absolutely mandatory for powerpc boards

> or just recommended and by combining appropriate defines in u-boot and

> linux it can be avoided?

Consider it mandatory.

> 2) I understood that I can add my proprietary drivers without creating

> nodes for them in the tree, is it correct?

Maybe, maybe not.  Device Trees describe _hardware_, not drivers.

> 3) In order to compile DT blob from DT source, DT compiler (dtc) is 
> required. I have installed one on my ubuntu machine and successfully 
> compiled source, creating a blob. Is this the only way to go? Perhaps 
> there is some target in Linux or u-boot Makefiles which does this job?

Install the DTC anyway you want.  I recommend grabbing it from jdl.com
and building it.

jdl