From: Randy Vinson <rvinson@mvista•com>
To: Andy Fleming <afleming@freescale•com>
Cc: "linuxppc-dev@ozlabs•org" <linuxppc-dev@ozlabs•org>
Subject: Re: [PATCH 2/8] Add uli1575 pci-bridge sector to MPC8641HPCN dts file.
Date: Mon, 04 Jun 2007 15:31:56 -0700 [thread overview]
Message-ID: <466492DC.6050708@mvista.com> (raw)
In-Reply-To: <02DC2E36-86B1-4458-BB0C-13CF79AC1D11@freescale.com>
Andy Fleming wrote:
> On Jun 3, 2007, at 03:33, Gabriel Paubert wrote:
>
[snippage]
>>
>> This said, I'm looking at device trees right now, and I can understand
>> that interrupt-parent of the 8259 is &mpic in mpc8641_hpcn.dts, but
>> I don't understand at all why it is &pci1 on the mpc85??cds.dts.
>>
>> But the definition of the ISA bridge in these files is very strange to
>> start with: I've never seen an ISA bridge with only an interrupt
>> controller
>> on it, no interrupts are connected to it and its reg property is
>> almost certainly wrong. Maybe it is an example of things that should
>> not be done.
>
>
> I take full responsibility for that. The CDS is a strange beast, so
> I did some strange things in the DTS.
>
> The i8259 is on a subsidiary bus, and so it's one bus #1.
Actually, that's not strictly true. If a card containing a P2P bridge is
installed into PCI slot 4, the i8259 will end up on a bus that is not
numbered bus 1. I've often wondered how something like that is handled
in the DTS.
Randy V.
next prev parent reply other threads:[~2007-06-04 22:50 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-01 17:48 [PATCH 2/8] Add uli1575 pci-bridge sector to MPC8641HPCN dts file Jon Loeliger
2007-06-01 18:58 ` Segher Boessenkool
2007-06-01 21:45 ` Wade Farnsworth
2007-06-02 8:22 ` Segher Boessenkool
2007-06-02 8:53 ` Gabriel Paubert
2007-06-02 9:01 ` Segher Boessenkool
2007-06-02 19:53 ` Gabriel Paubert
2007-06-02 20:23 ` Segher Boessenkool
2007-06-03 0:01 ` Benjamin Herrenschmidt
2007-06-03 7:41 ` Segher Boessenkool
2007-06-03 8:33 ` Gabriel Paubert
2007-06-03 8:57 ` Segher Boessenkool
2007-06-03 9:12 ` Benjamin Herrenschmidt
2007-06-03 10:02 ` Segher Boessenkool
2007-06-03 10:10 ` Gabriel Paubert
2007-06-03 11:42 ` Segher Boessenkool
2007-06-03 12:43 ` Gabriel Paubert
2007-06-03 14:42 ` Segher Boessenkool
2007-06-03 18:20 ` Gabriel Paubert
2007-06-03 18:56 ` Segher Boessenkool
2007-06-03 9:07 ` Benjamin Herrenschmidt
2007-06-03 9:59 ` Segher Boessenkool
2007-06-03 14:50 ` Jon Loeliger
2007-06-03 17:27 ` Segher Boessenkool
2007-06-04 20:27 ` Andy Fleming
2007-06-04 22:31 ` Randy Vinson [this message]
2007-06-05 19:16 ` Andy Fleming
2007-06-05 20:28 ` Randy Vinson
2007-06-06 7:09 ` Benjamin Herrenschmidt
2007-06-07 16:21 ` Andy Fleming
2007-06-07 16:53 ` Segher Boessenkool
2007-06-07 22:12 ` Benjamin Herrenschmidt
2007-06-08 8:29 ` Segher Boessenkool
2007-06-08 8:32 ` Benjamin Herrenschmidt
2007-06-05 6:05 ` Zang Roy-r61911
2007-06-02 23:52 ` Benjamin Herrenschmidt
2007-06-02 23:51 ` Benjamin Herrenschmidt
2007-06-03 8:59 ` Geert Uytterhoeven
2007-06-04 18:50 ` Jon Loeliger
2007-06-04 19:27 ` Segher Boessenkool
2007-06-01 23:28 ` Benjamin Herrenschmidt
2007-06-01 23:36 ` Jon Loeliger
2007-06-02 0:22 ` Benjamin Herrenschmidt
2007-06-02 8:28 ` Segher Boessenkool
2007-06-02 16:04 ` Jon Loeliger
2007-06-02 20:00 ` Segher Boessenkool
2007-06-02 23:16 ` Benjamin Herrenschmidt
2007-06-03 7:37 ` Segher Boessenkool
2007-06-04 0:16 ` Olof Johansson
2007-06-04 8:18 ` Segher Boessenkool
2007-06-02 8:25 ` Segher Boessenkool
2007-06-02 23:50 ` Benjamin Herrenschmidt
2007-06-03 0:13 ` Gabriel Paubert
2007-06-03 7:42 ` Segher Boessenkool
2007-06-03 7:53 ` Gabriel Paubert
2007-06-04 18:49 ` Jon Loeliger
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