linux-kernel - Re: Block request processing for MMC/SD over SPI bus

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Message-Id: <200608010745.40245.david-b@pacbell.net>
Date:	Tue, 1 Aug 2006 07:45:39 -0700
From:	David Brownell <david-b@...bell.net>
To:	hans@...ico.se
Cc:	linux-kernel@...r.kernel.org,
	Russell King <rmk+lkml@....linux.org.uk>
Subject: Re: Block request processing for MMC/SD over SPI bus

On Tuesday 01 August 2006 3:08 am, Hans Eklund wrote:

> As you can see om my LKML post, my driver covers (at first stage) everything 
> from low level SPI commands and block device insertion to the request 
> processing(since i at first could not connect to the MMC subsystem). Now, 
> Russel King believes that you may have written a SPI to MMC subsytem driver. 
> Correct? If so, whats the status on your driver?

Not entirely "my" driver, I just updated it and got it to partially enumerate
on some hardware that's a bit too weak for "real work":

http://sourceforge.net/mailarchive/forum.php?thread_id=13335072&forum_id=45866

... and there's the separate issue of the spi_claim()/spi_release() API
to take over an entire bus.  Such an API could be used by other SPI based
interfaces; some in-system-programmers (including JTAG) need that same kind
of protocol tweaking hook for SPI.

- Dave

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