From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: Purpose of MMC_DATA_MULTI?
Date: Wed, 1 Feb 2006 09:29:34 +0000 [thread overview]
Message-ID: <20060201092934.GB27735@flint.arm.linux.org.uk> (raw)
In-Reply-To: <43E057DA.7000909@drzeus.cx>
On Wed, Feb 01, 2006 at 07:40:26AM +0100, Pierre Ossman wrote:
> I noticed that a new transfer flag was recently added to the MMC layer
> without any immediate users, the MMC_DATA_MULTI flag. I'm guessing the
> purpose of the flag is to indicate the difference between
> MMC_READ_SINGLE_BLOCK and MMC_READ_MULTIPLE_BLOCKS with just one block.
> If so, then that should probably be mentioned in a comment somewhere.
There are hosts out there (Atmel AT91-based) which need to know if the
transfer is going to be multiple block. Rather than have them test
the op-code (which is what they're already doing), we provide a flag
instead.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
next prev parent reply other threads:[~2006-02-01 9:29 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-01 6:40 Purpose of MMC_DATA_MULTI? Pierre Ossman
2006-02-01 9:29 ` Russell King [this message]
2006-02-01 9:37 ` Pierre Ossman
2006-02-02 9:36 ` Russell King
2006-02-02 9:49 ` Pierre Ossman
2006-02-02 9:59 ` Russell King
2006-02-02 15:00 ` Pierre Ossman
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