Re: Device trees and systems-on-a-chip

[Arnd Bergmann <arnd@arndb.de>]

On Friday 23 September 2011 12:13:00 Linas Vepstas wrote:
> Here:  http://lwn.net/Articles/457635/  you say:  "If the device tree
> vision comes true, a single board will actually be able to use the
> same device tree binary on either one, independent of which CPU
> actually runs the kernel."
> 
> In my case, the hexagon and the arm cores will perceive the same
> devices at different addresses; there are also devices attached to one
> core that aren't attached to the other.  So either we have two DT's,
> one for each core, or we have one DT with subsections for each core.    
> 
> I haven't yet looked to see how the DT's are being designed, but I have
> this sneaking suspicion that the second alternative is not being
> pursued ...

Hi Linas,

You can have .dtsi include files that describe the common parts and
just put the child buses at different addresses or leave them out
from a main .dts source file.
I think it should all work out. If not, there is still the option
of adding features to dtc to allow what you need.

	Arnd