On 27 October 2011 01:23, Chris Ball <c...@laptop.org> wrote:
> Hi Girish,
>
> On Wed, Oct 26 2011, Girish K S wrote:
>> This patch adds the support of the HS200 bus speed for eMMC 4.5 devices.
>> The eMMC 4.5 devices have support for 200MHz bus speed.The mmc core and
>> host modules have been touched to add support for this module.
>>
>> It is necessary to know the card type in the sdhci.c file to add support
>> for eMMC tuning function. So card.h file is included to import the card
>> data structure.
>>
>> cc: Chris Ball <c...@laptop.org>
>> Signed-off-by: Girish K S <girish.shivananja...@linaro.org>
>
> The long case statements and conditionals in this patch make it pretty
> dense/ugly -- can you think of a way to avoid doing this to the code?
Definitely will workout.
> Also, it would be good to hear if anyone else has tested/is using this
> patch.
>
> Is having a new mmc_card_hs200() test desirable, compared to just
> reusing mmc_card_highspeed() and checking the ext_csd.card_type?
The specification classifies from 26 to 52MHz as high speed. And
anything above it upto 200 as hs200. I added the macro for
clarity and to be inclined to the specification.
> Thanks,
>
> - Chris.
> --
> Chris Ball <c...@laptop.org> <http://printf.net/>
> One Laptop Per Child
>
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