linux-kernel - Re: [PATCH] sdio: add CD disable support

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Date:	Thu, 30 Jul 2009 13:45:43 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Ohad Ben-Cohen <ohad@...cohen.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Philip Langdale <philipl@...rt.org>, ian@...menth.co.uk,
	pierre@...man.eu, linux-kernel@...r.kernel.org,
	linux-embedded@...r.kernel.org, nico@....org,
	nicolas.ferre@....atmel.com, hskinnemoen@...el.com,
	tony@...mide.com, david-b@...bell.net, manuel.lauss@...il.com,
	mirq-l@...per.es, Adrian Hunter <adrian.hunter@...ia.com>,
	Madhusudhan <madhu.cr@...com>
Subject: Re: [PATCH] sdio: add CD disable support

On Thu, Jul 30, 2009 at 02:54:08PM +0300, Ohad Ben-Cohen wrote:
> From: Ohad Ben-Cohen <ohad@...ery.com>
> 
> To save power, the pull-up resistor on CD/DAT[3] (pin 1)
> of the card can be disconnected. This is desired, e.g.,
> with embedded SDIO devices which do not rely on this pin
> for card detection.
> 
> Signed-off-by: Ohad Ben-Cohen  <ohad@...ery.com>
> ---
>  drivers/mmc/core/sdio.c  |   32 ++++++++++++++++++++++++++++++++
>  include/linux/mmc/card.h |    3 ++-
>  2 files changed, 34 insertions(+), 1 deletions(-)
> 

Do you have a follow-up patch to make use of this new functionality? I
can't see anywhere where disable_cd is set.


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