This patchset introduces runtime PM support to SDIO cards. What have been achieved: 1. Power to SDIO cards is kept low until one of its functions is bound (i.e. a matching driver is successfully probed) 2. If the matching driver supports runtime PM, power to the card is dropped soon after probe() returns. It is then up to the driver to request power to its function, using runtime PM API (the get/put variants). Last patch in this series demonstrates this with the wl1271 driver which couples the card power with the state of the wlan interface (interface up -> power is up, interface down -> power is down) 4. If a matching driver does not support Runtime PM, power to the card is kept high during the whole lifetime of the driver 5. When the driver is removed, power to the card is immediately dropped 6. If there are multiple drivers for the same card (several SDIO functions), power will be pulled high before the first driver probes, and dropped down after the last driver is removed. In between, power will be maintained accrording to the accumulated usage count of the complete drivers group Patches were tested on ZOOM3, 2.6.36-rc3. Dependencies (in case you want to test this): - The SDIO/MMC part depends on http://www.spinics.net/lists/linux-pm/msg21663.html (patch was already accepted by PM maintainer) - The WLAN part depends on http://www.mail-archive.com/linux-omap@xxxxxxxxxxxxxxx/msg34148.html Maturity level is much better than the previous RFC patches, and also testing that have been conducted are more intense. We still plan to stress this even further, but it's certainly ready for wide review. Next thing I plan on doing is testing this with SDIO suspend/resume (with and without MMC_PM_KEEP_POWER). I'll update as soon as I have results (setup issues and a business trip will keep me away for several days). Thanks, Ohad Ben-Cohen (8): mmc: sdio: fully reconfigure oldcard on resume mmc: let power save/restore ops return a value sdio: add power_restore support mmc: add general Runtime PM support sdio: add general runtime PM support sdio: enable Runtime PM for SDIO cards sdio: enable Runtime PM for SDIO functions wireless: wl1271_sdio: enable Runtime PM drivers/mmc/core/bus.c | 37 +++++++++++++++++++++ drivers/mmc/core/core.c | 20 ++++++++--- drivers/mmc/core/core.h | 4 +- drivers/mmc/core/mmc.c | 8 +++- drivers/mmc/core/sd.c | 8 +++- drivers/mmc/core/sdio.c | 42 +++++++++++++++++++----- drivers/mmc/core/sdio_bus.c | 50 +++++++++++++++++++++++++++- drivers/net/wireless/wl12xx/wl1271_sdio.c | 14 +++++++- include/linux/mmc/host.h | 4 +- 9 files changed, 161 insertions(+), 26 deletions(-) -- 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
