RE: [PATCH v10 07/10] OF: Introduce helper function for getting PCI domain_nr

[Phil Edworthy]

Hi,

On 10 September 2014 19:20, Arnd wrote:
> On Tuesday 09 September 2014 12:20:54 Catalin Marinas wrote:
> >
> > We can assume that if a domain is not specified and there is a single
> > top level PCIe node, the domain defaults to 0. Are there any arm32
> > platforms that require multiple domains (and do not specify a number in
> > the DT)?
> 
> In theory, I think all of them could work with a single domain, but then
> you need to partition the bus number space between the host controllers,
> so you have the exact same situation that you either need to make up
> random bus numbers or put them in DT.
> 
> Using multiple domains is way cleaner for this, even if we have to
> make up the numbers.

Maybe this is a stupid question, but why would you want to specify the domain
in the DT at all? Doesn't every instance of a driver imply a separate domain?

Thanks
Phil 
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