On Wed, 16 Aug 2017 08:32:09 +0800 Shawn Lin wrote: > Hi > > On 2017/8/16 6:40, Zhoujie Wu wrote: > > Hi Shawn, > > >> ---------------------------------------------------------------------- > >> Hi > >> > >> On 2017/8/15 6:19, Zhoujie Wu wrote: > >>> On some platforms, like armada3700, SD card need to > >>> do hard reset by gpio toggling to make it work properly > >>> after warm reset the board. > >> > >> I don't get this that SD card need to do hard reset... > >> > >> I assume what you talk about is either for eMMC or a power-cycle > >> for SD card. > > > > The subject of the patch confused you. What I want is a power-cycle for > > the SD card. The gpio is used to enable/disable the vdd power supply > > for sd card. > > Actually on a3700, when warm reset the board, their is no power-cycle > > for SD card, which will lead sd card can't response correct ocr and > > never set S18A unless a power-cycle. > > This is the purpose I submit this patch. > > > > Well, if that is the case, I suggest you to use regulator-gpio. Oh yes! If the gpio is for power, why not make use of regulator? then except the dts, we don't need do anything. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
