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Date: Wed, 05 Aug 2009 14:34:03 +0100
From: Ian Molton <ian@mnementh.co.uk>
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To: Magnus Damm <magnus.damm@gmail.com>
CC: Guennadi Liakhovetski <g.liakhovetski@gmx.de>,
       pHilipp Zabel <philipp.zabel@gmail.com>,
       Paul Mundt <lethal@linux-sh.org>,
       Mark Brown <broonie@opensource.wolfsonmicro.com>,
       linux-kernel@vger.kernel.org, Pierre Ossman <drzeus@drzeus.cx>,
       Magnus Damm <damm@opensource.se>
Subject: Re: MMC: Make the configuration memory resource optional
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Hi all,

Could all non-MFD users of tmio-mmc please ensure that the following is 
actually true on your hardware?

   mmc->f_max = pdata->hclk;
   mmc->f_min = mmc->f_max / 512;

According to all the data I have, the smallest divider setting of 0x100 
is /2 and only MFD controllers with the CNF area can select no-divider mode.

this would mean that non-MFD chips should be doing:

   mmc->f_max = pdata->hclk / 2;
   mmc->f_min = pdata->hclk / 512;