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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Stefan Roese <sr@denx.de>
Cc: Ayman El-Khashab <AymanE@tanisys.com>,
	Victor Gallardo <vgallardo@amcc.com>,
	linuxppc-dev@ozlabs.org
Subject: Re: Problems with PCI-E devices not being detected with switch
Date: Thu, 16 Oct 2008 19:29:45 +1100	[thread overview]
Message-ID: <1224145785.7654.4.camel@pasglop> (raw)
In-Reply-To: <200810161003.31801.sr@denx.de>

On Thu, 2008-10-16 at 10:03 +0200, Stefan Roese wrote:
> Doing this unconditionally is not a good idea since we could have an old 
> (buggy) firmware which didn't configure the PCIe controller correctly. But I 
> really like your idea with the device-tree property to optionally skip this 
> re-configuration. Now we only need to find some "volunteer" to do this 
> job... ;)

I don't have a problem adding support for testing that property and
skipping most of the initial HW setup, basically treating the endpoint
as pre-configured.

What about using a value for "status" ? Or an empty "configured"
property ? Ideally, it should have been the other way around, ie
"unconfigured" for old/buggy stuff but I'm worried there may be existing
out-of-tree device-trees without it :-)

Cheers,
Ben

  reply	other threads:[~2008-10-16  8:41 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-15 15:47 Problems with PCI-E devices not being detected with switch Ayman El-Khashab
2008-10-16  5:20 ` Benjamin Herrenschmidt
2008-10-16  8:03   ` Stefan Roese
2008-10-16  8:29     ` Benjamin Herrenschmidt [this message]
2008-10-16  8:48       ` Stefan Roese
2008-10-16  8:58         ` Benjamin Herrenschmidt
2008-10-16 15:01   ` Ayman El-Khashab
2008-10-16 21:19     ` Benjamin Herrenschmidt
2008-10-17  0:10     ` Benjamin Herrenschmidt
2008-10-17  7:22       ` Stefan Roese
2008-10-17 14:54       ` Ayman El-Khashab
2008-10-17 21:05         ` Benjamin Herrenschmidt
2008-10-17 21:19         ` Benjamin Herrenschmidt
2008-10-20 21:03           ` Ayman El-Khashab
2008-10-20 21:57             ` Benjamin Herrenschmidt
2008-10-20 22:14               ` Ayman El-Khashab
2008-10-20 22:55                 ` Benjamin Herrenschmidt

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