* Matthijs van Duin <matthijsvanduin@xxxxxxxxx> [170306 10:26]: > On 3 March 2017 at 17:19, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > > Sounds like we should do that ASAP. Care to send a patch for that? > > > > Never mind! > > I'm more familiar with (e)MMC than with SD and incorrectly assumed the card > supply voltage is also its I/O voltage, but apparently an SD card is > required to generate its I/O supply voltage internally, and this is > switched to 1.8V by software command. > > Now it all makes much more sense > > main 3.3V ---[REGEN3]---> switched 3.3V to sdcard and LDO9 > sdcard 3.3V ---[LDO9]---> host-side I/O supply > sdcard 3.3V ---[card-internal LDO]---> card-side I/O supply > > Sorry for the false alarm. OK good to hear there's no urgent need for fixes. > There are still things that should be fixed to accurately reflect the > schematics, including the use of REGEN3 to be able to power-cycle the card, > but they are less urgent now and can wait until I've had time to test them. OK Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
