From: David Vrabel <david.vrabel@csr.com>
To: Chris Ball <cjb@laptop.org>
Cc: Nicolas Pitre <nico@fluxnic.net>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mmc@vger.kernel.org
Subject: Re: [PATCH 5/5] SDIO: put active devices into 1-bit mode during suspend
Date: Wed, 10 Feb 2010 16:49:37 +0000 [thread overview]
Message-ID: <4B72E3A1.4020902@csr.com> (raw)
In-Reply-To: <m31vgt127c.fsf@pullcord.laptop.org>
Chris Ball wrote:
> Hi David,
>
> > I couldn't find anything in the SDIO specification (you know the
> > section number?). Part A2 has a requirement that the controller
> > be placed into 1-bit mode but this doesn't mean that the card has
> > to be.
>
> I think it's part E1 section 8, and does specify that it's necessary
> for both host and card.
Found it now, thanks. The patch is fine as is.
(FWIW, my confusion arose because CSR chips can assert interrupts in
4-bit mode even without SDCLK.)
David
--
David Vrabel, Senior Software Engineer, Drivers
CSR, Churchill House, Cambridge Business Park, Tel: +44 (0)1223 692562
Cowley Road, Cambridge, CB4 0WZ http://www.csr.com/
Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom
prev parent reply other threads:[~2010-02-10 16:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-09 20:29 [PATCH 0/5] SDIO support for "powered" suspend Nicolas Pitre
2010-02-09 20:29 ` [PATCH 1/5] SDIO: introduce API for special power management features Nicolas Pitre
2010-02-11 20:32 ` Andrew Morton
2010-02-11 20:57 ` Nicolas Pitre
2010-02-09 20:29 ` [PATCH 2/5] SDIO: sdhci support for suspend mode PM features Nicolas Pitre
2010-02-09 20:29 ` [PATCH 3/5] SDIO: Don't use CMD[357] as part of a powered SDIO resume Nicolas Pitre
2010-02-09 20:29 ` [PATCH 4/5] SDIO: kick the interrupt thread upon a resume Nicolas Pitre
2010-02-09 20:29 ` [PATCH 5/5] SDIO: put active devices into 1-bit mode during suspend Nicolas Pitre
2010-02-10 11:30 ` David Vrabel
2010-02-10 15:17 ` Chris Ball
2010-02-10 16:03 ` David Vrabel
2010-02-10 16:32 ` Chris Ball
2010-02-10 16:49 ` David Vrabel [this message]
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