> -----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; ag...@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: > > > > 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; ga...@kernel.crashing.org; Li Yang-R58472; > >>> ag...@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: ga...@kernel.crashing.org > >>>>> Cc: ag...@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?
That could work, but looks hackish. Our proposal for adding a new device tree property is a generic solution. 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. - Leo _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev