Hi Zhangfei, On Fri, Jun 10, 2011 at 5:02 AM, zhangfei gao <zhangfei.gao@xxxxxxxxx> wrote: > Here is answer got from the sd8686 maintainer. > > For 8686, the SDIO state machine can only handle init sequence (CMD5, > 5, 3, 7) from host once. If host sends another init sequence, it will > not be able to handle CMD5 and causes the SDIO block to hang. Chips > that are newer than 8686 will be able to handle multiple init sequence > from host. Thanks for the reply ! > So yes, for 8686, an IO reset is needed before host can send a new set > of init sequence. But if we're powering down and up the device first, then the init sequence is considered the first one, and then we don't need an IO reset, right ? That was what we wondered about. Thanks, Ohad. -- 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
