linux-kernel - Re: [PATCH 7/7] mmc_spi: support for non-byte-aligned cards

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Date:	Wed, 11 Mar 2009 15:03:30 +0000
From:	Will Newton <will.newton@...il.com>
To:	Wolfgang Mües <wolfgang.mues@...rswald.de>
Cc:	Pierre Ossman <drzeus@...eus.cx>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matt Fleming <matt@...sole-pimps.org>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Mike Frysinger <vapier.adi@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7] mmc_spi: support for non-byte-aligned cards

On Wed, Mar 11, 2009 at 3:00 PM, Wolfgang Mües
<wolfgang.mues@...rswald.de> wrote:
> Will,
>
> Am Mittwoch, 11. März 2009 schrieb Will Newton:
>> Are they using the same host controller? Have you tried these cards
>> with a different host controller?
>
> I have tried with 3 different spi host controllers.
>
>> Are you clocking them particularly slow or fast?
>
> 400 KHz, 20 MHz and 25 MHz.
>
>> A logic probe may not display any signal integrity issues you might have.
>
> My "logic probe" is a 1 GHz leCroy DSO.
>
> I am doing this for money, and I am no amateur.

Ok, sure, but these are things that are best put in your changleogs so
people can understand what hardware is problematic and how it is
proven.

I have not seen these problems or seen them reported by others.
Hopefully they will speak up and confirm your results.
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