mmc over spi

mmc over spi

[BRADWAY, Kevin]

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I am trying to use the mmc over spi in the 2.6.24 distro on a pxa25XX.

I have read and read the blackfin and the git pages for the 2.6.24 add ins for this topic but I still can not seem to get it going.

I am using
       gpio6 for the clock
       gpio12 for the CD
       gpio8 for the CS

questions:
        Do I need the pxa2XX_spi driver to make this work?

        Do I need to write my own init to get the thing to probe?

Thanks,
Kevin

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Re: mmc over spi

[Ned Forrester]

BRADWAY, Kevin wrote:
> I am trying to use the mmc over spi in the 2.6.24 distro on a pxa25XX.
> 
> I have read and read the blackfin and the git pages for the 2.6.24 add ins for this topic but I still can not seem to get it going.
> 
> I am using 
>        gpio6 for the clock
>        gpio12 for the CD
>        gpio8 for the CS

Those pins on a PXA2xx don't have anything to do with SPI.  I see that 6
and 8 have an MMC function, but I would guess that that is for some
native MMC capability, and not for MMC over SPI.

> questions:
>         Do I need the pxa2XX_spi driver to make this work?

The only pins that the pxa2xx_spi driver will operate with, are the SSP
ports.  These are GPIO 23-27 (SSP) and GPIO 81-84 (NSSP).

See Section 4.1.2 of the PXA255 developers manual for the various GPIO
pin functions.

-- 
Ned Forrester                                       nforrester-/d+BM93fTQY@public.gmane.org
Oceanographic Systems Lab                                  508-289-2226
Applied Ocean Physics and Engineering Dept.
Woods Hole Oceanographic Institution          Woods Hole, MA 02543, USA
http://www.whoi.edu/sbl/liteSite.do?litesiteid=7212
http://www.whoi.edu/hpb/Site.do?id=1532
http://www.whoi.edu/page.do?pid=10079


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