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Date: Fri, 29 Jun 2012 11:01:34 -0500
From: Scott Wood <scottwood@freescale.com>
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To: Kumar Gala <galak@kernel.crashing.org>
Subject: Re: [PATCH 0/3] powerpc/fsl: PCI refactoring and QEMU paravirt
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Cc: Wood Scott-B07421 <B07421@freescale.com>, "agraf@suse.de" <agraf@suse.de>,
 "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
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On 06/29/2012 10:57 AM, Kumar Gala wrote:
> 
> On Jun 28, 2012, at 9:36 PM, Jia Hongtao-B38951 wrote:
> 
>>
>>
>>> -----Original Message-----
>>> From: Wood Scott-B07421
>>> Sent: Friday, June 29, 2012 12:31 AM
>>> To: Jia Hongtao-B38951
>>> Cc: Wood Scott-B07421; galak@kernel.crashing.org; 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 06/27/2012 11:06 PM, Jia Hongtao-B38951 wrote:
>>>>
>>>>
>>>>> -----Original Message-----
>>>>> From: Wood Scott-B07421
>>>>> Sent: Thursday, June 28, 2012 7:49 AM
>>>>> To: galak@kernel.crashing.org
>>>>> Cc: agraf@suse.de; linuxppc-dev@lists.ozlabs.org; Jia Hongtao-B38951
>>>>> Subject: [PATCH 0/3] powerpc/fsl: PCI refactoring and QEMU paravirt
>>>>> platform
>>>>>
>>>>> The QEMU stuff is related to the PCI refactoring because currently
>>>>> we have a hard time selecting a primary bus under QEMU, and also
>>> because
>>>>> the generic qemu e500 platform wants a full list of FSL PCI
>>> compatibles
>>>>> to check.
>>>>>
>>>>
>>>> It seems that not all primary bus has "isa" node like 8541 and 8555.
>>>
>>> Do those boards (it's the boards that matter, not chips...) have legacy
>>> ISA?  If they do, and it's not in the device tree, then we should fix
>>> the device tree for consistency, but also retain some sort of hack to
>>> remain compatible with old device trees.
>>>
>>> A board can refrain from using the new common infrastructure if it has a
>>> good reason to.
>>
>> I'm not sure that MPC8541CDS (or 8555) has legacy ISA. I just checked in
>> kernel and dts which implies the board has primary bus and no "isa" node.
>> I will find out the facts later.
> 
> 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?

-Scott