Subject: Re: MMC Driver RFC
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Richard Purdie <rpurdie@rpsys.net>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>, Ian Molton <spyro@f2s.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Pierre Ossman <drzeus-list@drzeus.cx>
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On Sul, 2005-01-16 at 23:17, Richard Purdie wrote:
> On the subject of patents, the whole idea behind SD is that there aren't 
> patents as for a patent to exist, we'd have some publicly available 
> information on how SD works. We're not breaking any copyrights as I nobody 
> involved with this code has see any code to copy from.
> 
> So in short, I can't see any reason we can't put the code we have into the 
> kernel...

Given that companies like Intel have been published the SD
initialisation sequences since 2002 and nobody has taken any action I
can't see this as being credibly a trade secret or obtained maliciously.
Nor does the document state anything is secret.

See Intel app note 278533-001 "Using SDCard and SDIO with Intel (r)
PXA250 Applications Processor MMC Controller" 

http://www.intel.com/design/pca/applicationsprocessors/applnots/278533-001.htm

If there were any secrets the owners appear to have failed to take any
action neccessary to defend them.

Alan

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