On Thu, Nov 06, 2014 at 11:42:41AM +0000, Arnd Bergmann wrote:
> On Thursday 06 November 2014 10:05:18 Liviu Dudau wrote:
> > On Wed, Nov 05, 2014 at 11:17:43PM +0000, Bjorn Helgaas wrote:
> > > On Tue, Nov 04, 2014 at 12:47:40PM +0100, Lucas Stach wrote:
> > > > This property was added by 41e5c0f81d3e
> > > > (of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr())
> > > > without the required binding documentation. As this property
> > > > will be supported by a number of host bridge drivers going forward,
> > > > add it to the common PCI binding doc.
> > > >
> > > > Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> > >
> > > I merged 41e5c0f81d3e through my tree, and I could merge something like
> > > this if a consensus develops with some acks. But I'll just let you guys
> > > handle it unless you poke me again.
> >
> > While I think the "linux,pci-domain" property *must* be documented, I
> > would like to get a consensus first on the usage. If we agree that
> > the property is mandatory to all host bridge drivers that use OF then
> > we need to patch existing drivers (partially done through Lorenzo's
> > patches, but other arches are ignoring it). If we say all *new* drivers
> > need to use it then we also need to come up with a strategy on how to
> > deal with old vs new school drivers.
> >
> > My preferred approach is the 3rd way: "linux,pci-domain" becomes part of
> > the core PCI infrastructure (and we find the common ground with ACPI).
> > That way the host bridge drivers don't have to do anything, but the DT
> > creators have to specify a value.
> >
> > Pinging Rob to try to get a peek on this thoughts.
>
> Parsing "linux,pci-domain" from the PCI core code seems like the best
> solution to me, but we still have to support dtbs that don't contain
> it. Lorenzo's patch gets this right I think.
Agree. But we are not covering other architectures that use OF yet.
>
> ACPI is easy here, because it already requires the domain to be
> explicit.
I was thinking more along the line of code sharing.
Best regards,
Liviu
>
> Arnd
>
>
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
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