On Thu, Oct 28, 2010 at 6:40 PM, Kishore Kadiyala <kishorek.kadiyala@xxxxxxxxx> wrote: > On Thu, Oct 28, 2010 at 9:43 PM, Nicolas Pitre <nico@xxxxxxxxxxx> wrote: >> This is not clear that this is something that the core can effectively >> help with. Opportunistic power saving at the host controller level is >> pretty much hardware dependent and may wildly vary in capabilities... >> and bugs. So in this later case I think the driver for the host >> controller is the best place to just set up a timer and gate the clock >> after a certain period of inactivity for example. makes sense, thanks. > Agree, > So briefly, calling pm_runtime_put_sync using a activity based timer > in the host Controller > driver will gate the clock to the controller . Just make sure you call pm_suspend_ignore_children(), because you want to be able to gate that clock even when the card is still active > On idle notification to PM runtime core, which will trigger a call to > the runtime_suspend hook in bus.c > [https://patchwork.kernel.org/patch/226671/ ] which will perform > powering off the Card Kishore, I'm not sure what you meant in the last sentence ? -- 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
