Re: [PATCH 3/4] mmc: add MMC_QUIRK_DISABLE_CD

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On 04/01/2011 22:27, Ohad Ben-Cohen wrote:
> On Wed, Jan 5, 2011 at 12:13 AM, Ohad Ben-Cohen <ohad@xxxxxxxxxx> wrote:
>>> Whether this pull up should be
>>> enabled or disabled is determined by the board (not the card).  The
>>> pull-up should be disabled if the board has a pull-up external to the
>>> card, otherwise it must remain enabled.
>>
>> Agree.
> 
> It might make more sense to use a host CAP though for this (i.e.
> MMC_CAP_DISABLE_CD).

Could we unconditionally disable the card's internal pull-up?  A board
that's using DAT3 for card detection should have a switchable pull-down
/and/ a switchable pull-up.

This would cause regressions on boards that aren't properly designed and
have omitted the pull-up.  Are there boards like this?

David
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