[Arm-netbook] SD card issue

Ben Dooks ben at fluff.org
Mon Mar 29 20:42:30 BST 2010

On Mon, Mar 29, 2010 at 01:06:53PM +0000, Luke Kenneth Casson Leighton wrote:
> On Mon, Mar 29, 2010 at 10:27 AM, Ben Dooks <ben at fluff.org> wrote:
> > On Mon, Mar 29, 2010 at 02:19:35AM +0100, Frans Pop wrote:
> >> There's something really weird with the recognition of the NAND and
> >> external SD card in the kernel.
> >>
> >> If no external SD card is inserted, then the NAND is not recognized...
> >
> > IIRC, it isn't really a NAND chip, it is a board-mounted SD style device,
>  yes.  Sandisk.
> > and it may be that the system is sharing the card-detect lines.
>  ohh... wait.... there may be differences in the setup of the hsmmc
> devices, between mer-smartq, 2.6.24-samsung and 2.6.24-chitech.
> certainly the mer-smartq guys had to mess about somewhat with the
> hsmmc setup (pulling some gpios not others) and whoever did the kernel
> for the ctpc89e also i believe did likewise [mess about].
>  so it could be something as simple as the card-detect lines are
> swapped, or were _disabled_ for the NAND but not SD card.  or
> something ugly.

There is one GPIO capable of card-detect, which has both HSMMC0
and HSMMC1's card detects on it. You get to choose one.

If no-one's implemented card-permanently-inserted for the s3c-sdhci
driver, then this is the time to do it.


Q:      What's a light-year?
A:      One-third less calories than a regular year.

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