Re: [PATCH 0/3] powerpc/fsl: PCI refactoring and QEMU paravirt platform

[Scott Wood <scottwood@freescale.com>]

On 06/29/2012 11:18 AM, Li Yang-R58472 wrote:
> 
> 
>> -----Original Message----- From: Wood Scott-B07421 Sent: Friday,
>> June 29, 2012 11:02 AM To: Kumar Gala Cc: Jia Hongtao-B38951; Wood
>> Scott-B07421; Li Yang-R58472; agraf@suse.de; 
>> linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH 0/3] powerpc/fsl:
>> PCI refactoring and QEMU paravirt platform
>> 
>> On 06/29/2012 10:57 AM, Kumar Gala wrote:
>>> Pretty sure the boards have ISA, if you see the .dts has
>>> references to
>> 'ISA bridge' & 'i8259' PIC.
>> 
>> OK.  How about looking for an i8259 node as well?
> 
> That could work, but looks hackish.  Our proposal for adding a new
> device tree property is a generic solution. 

Yes, all *new* boards should have an isa node.  But we want to remain
compatible with existing device trees.

> The only problem is that
> new kernels would work with old device trees.  I think we can use
> your solution for transitional period.  And go for a well defined
> device tree binding for this in long run.

The "transitional period" is until we no longer care about these
specific boards, or any out-of-tree derivatives.

-Scott