Hi David, > Why? Is this for a specific card that doesn't support > asynchronous card interrupts while in 4-bit mode? If so, I'd > suggest a card quirk for this and only switch modes for these > cards. (As a check that we're on the same page -- sdio_disable_wide() is only called if MMC_PM_KEEP_POWER is true, which means the system is going to be suspended but the card will remain externally powered without its clock.) Under the circumstances above, it's a requirement of the SDIO spec that moving to 1-bit mode must happen before stopping the clock if the interrupt mechanism is to be used to wake the host, and the chipset we've been using (Via VX855) fails to generate a wakeup if the switch isn't made. Do you have experience of another chipset that doesn't need the switch to 1-bit mode for a clockless wakeup? Thanks, - Chris. -- Chris Ball <cjb@xxxxxxxxxx> One Laptop Per Child -- 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
