On Tue, 12 Oct 2010, Dmitry Shmidt wrote: > MMC_PM_KEEP_POWER is mostly related to mmc host controller - keeping > or not keeping power on suspend/resume.
It is not "mostly related", it is _totally_ related and actually its purpose for existing. > MMC_PM_WAKE_SDIO_IRQ is not related to anything right now. Also in > most of the cases sdio irq can not be a wake source of the application > processor. Why not? I know about at least 2 host controllers which can be configured so a transition on DAT3 would wake up the host. > Imagine your device is keeping connection during suspend. You got packet - > wlan will wake application processor > through external irq line and linux starts resume. You can not find wlan > card again - it is too slow. What? I'm not following you anymore. The Libertas firmware can be configured to filter incoming packets and only assert the IRQ signal only when a specific packet comes in, just like wake-on-LAN for Ethernet devices. > Again, for mmc card it totally makes sense - mmc card is NOT an active > device. But MMC cards still have operating states. You cannot simply write to them after a power disconnect, and leaving them powered on suspend is not very efficient either. PS: common netiquette is not to top-post. Nicolas -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
