Hello. The following patches, currently built against an ST Kernel "2.6.32", show how to improve the wakeup support in the SDHCI device driver. Note: I'm going to rework them, for example, against the mmc-next after performing the review process and, obviously, if you think that they can be actually useful. Indeed, on a STB, it can be nice to have the capability to wake-up the system when a card is inserted ;-). This work allows the SDHCI to wake up the system on the following events: 1) Card Interrupts. 2) Card Insertion. 3) Card Removal. To do that the sdhci has to perform some operations described in the patch named: "mmc_sdhci: improve the wake-up support" A new parameter has been also added to select which wakeup event has to be used. At any rate, a device based on the sdchi, e.g. sdhci-pci, can use a default mode (that can be modified at run-time as well). In case of the sdhci-pci the "Card Interrupt event" has not been modified according to the logic behind the recent commit: 5f619704d18b93869d045abc49e09cdba109b04b The define MMC_PM_KEEP_POWER has been used to notify that a device driver (e.g. sdhci-pltfm) want to wakeup the system. In any case, the logic for programming the HC register is embedded in the suspend and it's self contained. To modify at run time the wakeup event we can do: $ echo X > /sys/module/sdhci/parameters/wakeup where X can be: 0: no wakeup 1: Card Interrupts 2: Card Insertion 3: Card Removal Hmm, maybe it's worth having more parameters instead of the wakeup. I mean, something like this (welcome feedback): wake_on_card_int wake_on_card_ins wake_on_card_rem Welcome advice and feedback as usual. Regards Giuseppe -- 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
