From: Andres Salomon <dilinger@queued.net>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Jordan Crouse <jordan.crouse@amd.com>,
info-linux@geode.amd.com, gregkh@suse.de,
linux-pci@atrey.karlin.mff.cuni.cz, tsylla@gmail.com
Subject: Re: UNS: Re: [PATCH] PCI: do not delay when changing power states on Geode
Date: Sun, 8 Jul 2007 11:44:43 -0400 [thread overview]
Message-ID: <20070708114443.4f2ee65e.dilinger@queued.net> (raw)
In-Reply-To: <20070706110518.13399132@the-village.bc.nu>
On Fri, 6 Jul 2007 11:05:18 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Thu, 5 Jul 2007 22:13:51 -0400
> Andres Salomon <dilinger@queued.net> wrote:
>
> > Geode hardware requires no delay when doing power transition for PCI;
> > the board doesn't even have a real PCI bus. Thanks to Tom Sylla for
> > pointing this out. We can save precious milliseconds when changing power
> > states to D3hot by getting rid of this delay.
> >
> > We do this as a PCI quirk.
>
> NAK
>
> These systems may have other components on them which require the proper
> transition times and the CS5530 supports external real PCI devices.
>
> Alan
You're right; I munged the description. Turns out the patch is wrong
anyways, though (whether the delay is necessary or not turns out to be
firmware dependent).
--
Andres Salomon <dilinger@queued.net>
prev parent reply other threads:[~2007-07-08 15:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-06 2:13 [PATCH] PCI: do not delay when changing power states on Geode Andres Salomon
2007-07-06 10:05 ` Alan Cox
2007-07-08 15:44 ` Andres Salomon [this message]
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