linux-kernel - Re: [patch 4/4] sdio: disable CD resistor

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Message-ID: <20070807154342.47f63cfe@poseidon.drzeus.cx>
Date:	Tue, 7 Aug 2007 15:43:42 +0200
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	David Vrabel <david.vrabel@....com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [patch 4/4] sdio: disable CD resistor

On Tue, 07 Aug 2007 13:55:59 +0100
David Vrabel <david.vrabel@....com> wrote:

> sdio: disable CD resistor
> 
> Disable the card detect resistor to ensure all data lines are equally
> loaded. Not doing this can have a negative impact on buses with
> marginal signal quality.
> 
> Signed-off-by: David Vrabel <david.vrabel@....com>

I'm not sure about this. I've seen several hosts which lack a
mechanical detect switch.

-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org
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