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

[Robin Getz]

On Wed 11 Mar 2009 11:03, Will Newton pondered:
> On Wed, Mar 11, 2009 at 3:00 PM, Wolfgang MÃes
> <wolfgang.mues@xxxxxxxxxxxx> wrote:
> > Will,
> >
> > Am Mittwoch, 11. MÃrz 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.

We have seen the same issues, and have had various Blackfin users report the 
same with a select number of cards. (including Kingston cards that Wolfgang 
referenced).

A few (who also had ARM platforms) said they saw the same on different SPI 
controllers - so I don't think it is a Blackfin specific issue.

-Robin
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