At Wed, 8 Dec 2010 21:18:38 -0500, zhangfei gao wrote: > > On Wed, Dec 8, 2010 at 4:04 AM, Takashi Iwai <tiwai@xxxxxxx> wrote: > > JMicron 388 SD/MMC combo controller supports the 1.8V low-voltage for > > SD, but MMC doesn't work with the low-voltage, resulting in an error > > at probing. > > > > This patch adds the support for multiple voltage mask per device type, > > so that SD works with 1.8V while MMC forces 3.3V. ÂHere new ocr_avail_* > > fields for each device are introduced, so that the actual OCR mask is > > switched dynamically. > > It is great that you also have 1.8v requirement, could you help share some info? > What's the card you are using, mmc or sd, if sd, does cmd11 is required? > Which component will provide voltage in your platform, external pmic > or controller? > What's the init voltage, 3.3v? and then switch to 1.8v, does some time > required to wait voltage to be stable? I guess Aries can answer to these at best :) 1.8V case was tested mainly by him. thanks, Takashi -- 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
