Re: [PATCH v5 0/4] mmc: core: Signal voltage switch procedure for UHS mode

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On Tue, 8 Jan 2013, Johan Rudholm wrote:

> This patch series attempts to make the 1.8V signal voltage switch
> required for UHS mode work according to the SD specification.
> 
> These patches have been tested with a couple of UHS SD cards, one of
> which sometimes requires up to five power cycles before it accepts the
> signal voltage switch.

Any idea why this is the case?


Nicolas
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