linux-kernel - Re: [PATCH v2 4/7] atmel-mci: support multiple mmc slots

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Message-ID: <20081012180713.049aa297@hskinnemo-gx745.norway.atmel.com>
Date:	Sun, 12 Oct 2008 18:07:13 +0200
From:	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
To:	Pierre Ossman <drzeus-list@...eus.cx>
Cc:	kernel@...32linux.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/7] atmel-mci: support multiple mmc slots

Pierre Ossman <drzeus-list@...eus.cx> wrote:
> > It can happen if the controller is hooked up to a fast bus and fOD is
> > slow for whatever reason. And if it does, clkdiv will wrap around and
> > end up at a rate much faster than requested, so saturating it at the
> > maximum divider is the safe thing to do.
> >   
> 
> Isn't this calculated for f_min though so that the MMC core will never
> request such a frequency?

Hmm...yes, you're probably right. Still, I think it's a nice safety net
if someone manages to mess up f_min or starts doing more aggressive
frequency scaling.

Haavard
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