On 06/19/2013 06:23 PM, Alan Stern wrote: > On Wed, 19 Jun 2013, Roger Quadros wrote: > >> Hi, >> >> This series attempts to suspend the OMAP EHCI host controller on USB >> Bus suspend. > > Why do you want to suspend the host controller during bus suspend? > They are two different operations and should be carried out at two > different times. The controller should be suspended during controller > suspend, not during bus suspend. > Good point. I didn't think it that way. I think it should work. >> As the omap-ehci controller driver needs to do some additional work to put >> itself into suspend/resume and make sure it is resumed to process an interrupt, >> we need to be able to override irq, bus_suspend, and bus_resume handlers. This >> provision is done in patch 3. > > Do you still need to override these things if you do the controller > suspend at the right time? > At least not for bus_suspend and bus_resume. We will still need to override the irq handler though. But, if we can take care of this generically in the ehci_irq handler (i.e. make sure controller is not suspended while accessing it) then we don't need such override for irq. cheers, -roger -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
