On Mon, Oct 24, 2011 at 11:54:00AM +0200, Linus Walleij wrote: > On Mon, Oct 24, 2011 at 11:36 AM, Russell King - ARM Linux > <linux@xxxxxxxxxxxxxxxx> wrote: > > On Sun, Oct 23, 2011 at 02:31:39AM +0200, Sebastian Rasmussen wrote: > >> I guess the patch would appeal more to Russell if mmci_runtime_suspend() > >> only cleared MCIMask0/SDI_MASK0 and MCIClock/SDI_CLKCR and left > >> MCIPower/SDI_PWR unchanged. It may be the case that the signal direction > >> bits need to be cleared for the ST-Ericsson PL180, but I haven't yet verified > >> this on my Snowball dev board yet. > > > > There's also the issue that the specs call for the clock to run after > > a command has completed for a certain number of cycles, and that the > > clock must continue to run until the card reports not-busy after a > > programming or erase cycle has completed - that can be long after the > > previous command has 'completed'. > > It's 8 cycles on MCLK required. _Plus_ keeping the clock running while the card is signalling busy. If you don't clock the card while its signalling busy, it will never go non-busy (the data line becomes frozen.) -- 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
