Re: generating a phandle w/libfdt?

[David Gibson <david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org>]

On Fri, Oct 24, 2008 at 09:29:21AM -0700, Yoder Stuart wrote:
>  
> 
> > -----Original Message-----
> > From: 
> > devicetree-discuss-bounces+stuart.yoder=freescale.com@ozlabs.o
> > rg 
> > [mailto:devicetree-discuss-bounces+stuart.yoder=freescale.com@
> ozlabs.org] On Behalf Of Kumar Gala
> > Sent: Friday, October 24, 2008 9:19 AM
> > To: devicetree-discuss
> > Subject: Re: generating a phandle w/libfdt?
> > 
> > 
> > On Oct 24, 2008, at 8:11 AM, Kumar Gala wrote:
> > 
> > > In some work I'm doing I noticed we don't have any APIs to 
> > generate  
> > > a phandle via libfdt.
> > >
> > > was wondering if anyone had ideas on this.
> > >
> > > In first thought it seems we have to scan through the whole blob  
> > > looking for the largest phandle id and than +1 it to generate the  
> > > next "valid" id.  Any other ideas on how to do this more 
> > efficiently?
> > 
> > The other question is there a way today to create a phandle even if  
> > there isn't a reference to it elsewhere in a .dts?
> 
> We had this issue and the 'hack' was to create a phandle property
> in the node itself, so it was self-referenced.  That caused DTC
> to allocate a phandle.   We then could reference the node from
> dynamically generated nodes.

That's nasty.  I should add a way to make dtc generate a phandle for a
node, even if it's not referenced from elsewhere.  Just need to think
of a decent syntax.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson