Hi, I'm working on getting runtime pm working on the XO-1.5 laptop (sdhci-pci) in case it is related to some other power-related issues we have been having. Right now, when runtime is enabled, the card cannot be brought back online again after it has been powered off. I've dug down and I think that runtime PM is doing basically nothing. i.e. when the system decides to runtime-suspend my SD card, nothing actually happens to the SD card. It remains fully powered and untouched. I'm basing this assumption on mmc_power_save_host() which relies entirely on host->bus_ops->power_save() doing the actual power-down work. On sdhci this method does not exist. I figure that if I write sdhci power_save and power_restore functions, the problem might be solved. I looked at the other host controllers hoping to get a feel for the kind of thing that should be done in such a handler but didn't find any host controller that implements this. Is there a host controller patch somewhere that implements power_save/power_restore? Maybe even for sdhci? cheers, Daniel -- 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
