[U-Boot] [PATCH] mmc: Implement card detection.

[Andy Fleming]

On Tue, Nov 29, 2011 at 1:02 AM, Thierry Reding
<thierry.reding at avionic-design.de> wrote:
> * Andy Fleming wrote:
> [...]
>> Well, while this isn't the case in any systems I know of now, it is
>> quite possible for there to be more than one *type* of SD/MMC
>> controller on an SoC, and there's always the possibility that an SoC
>> provides a non-controller-specific card-detect mechanism. The idea is
>> that, lacking a board-specific card-detect mechanism, the SoC might be
>> able to direct the query to the right place.
>>
>> But I'm talking very theoretically, here. I wouldn't object to a
>> mechanism that was just:
>>
>> cd = board_mmc_getcd(mmc);
>>
>> if (cd < 0 && mmc->getcd)
>>    cd = mmc->getcd(mmc);
>>
>> If we ever ran into a case where an SoC had better knowledge than the
>> driver, then it's easy to fix the code.
>
> That makes sense. The code can always be extended when new hardware requires
> it. No need to over-engineer at this point.
>
> Do you want me to prepare a patch or should we rather wait for some more
> input from others?

I'll happily take a patch. I may wait to apply it, but probably, as
the merge window is *long* closed, so it won't get pulled into
mainline until mid-December (I'll apply it to my -next branch).

Andy