[U-Boot] [PATCH/RFC] drivers/mmc/mmc.c: change the controller frequency before the card frequency

[Albin Tonnerre]

On Thu, Aug 20, 2009 at 01:42:04AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote :
> On 14:16 Wed 19 Aug     , Albin Tonnerre wrote:
> > While rewriting the atmel_mci driver to use the new MMC_GENERIC API (and allow
> > the use of SD/MMC on AT91 in the process), it appeared that switching the card
> > frequency before the controller frequency resulted in the answer from the card
> > never being received. Changing the controller frequency before the controller
> > frequency fixes that.
> IIRC it's not correct you are supposed to switch the card to higherfreq and
> then the bus speed

This was an error on my side, sorry for the noise.

> could show the patch of the atmel_mci to help

It's not complete yet, but I'll be sure to post it for comments as soon as i'm
done.

> Best Regards,
> J.

Regards,
-- 
Albin Tonnerre, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com
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