Re: [PATCH v2] mmc: core: Try other signal levels during power up

2014-04-25 Thread Ulf Hansson
On 24 April 2014 23:44, Tim Kryger wrote: > The eMMC signalling voltage is determined by VCCQ which is provided to > the card by the host. Signalling is not required to begin at 3.3v and, > if the host and card both support a particular VCC/VCCQ combination, it > can be used immediately. > > In c

[PATCH v2] mmc: core: Try other signal levels during power up

2014-04-24 Thread Tim Kryger
The eMMC signalling voltage is determined by VCCQ which is provided to the card by the host. Signalling is not required to begin at 3.3v and, if the host and card both support a particular VCC/VCCQ combination, it can be used immediately. In contrast, SD Cards must begin with 3.3v signalling and