On Mon, 5 Jul 2010, Raj Kumar wrote: > > Hi Alan, > > > > I have few more questions about run time power management: > > > > 1) Please correct me if i am wrong. If there is a bus driver that is managing various power domains, > > and suppose this domain has some child devices. > > > > Then child has to inform run time Power management core i am idle and i want to go to get suspended, Strictly speaking, the child device doesn't do this -- its driver does. > then run time pm core will notify the bus driver of child and then bus driver calls the corresponding child's > > > > suspend. right? Right. In fact, that's true even when the bus driver manages only a single power domain. > 2) run time power management can be done at device "type" and "class". But what does mean of this device > > type. what use cases are defined for run time power management for device "type"? Here are a couple of examples. In the USB subsystem there are two "types": devices and interfaces. In the SCSI subsystem there are three "types": hosts, targets, and LUNs. Each type generally needs to do runtime power management differently. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
