On Fri, 22 Jun 2007, Rafael J. Wysocki wrote: > On Friday, 22 June 2007 21:49, David Brownell wrote: > > On Thursday 21 June 2007, Alan Stern wrote: > > > > > > I'd be perfectly happy to have the list of supported system power > > > states be exported by the platform code instead of predetermined by the > > > PM core. It would still be necessary to add a method whereby the PM > > > core could inform the platform about the new target state at the > > > beginning of a state change. And of course there would have to be a > > > way for drivers or subsystems to query the platform, to see what > > > resources would be available. > > > > Rafael will propose the new method, I guess; > > Yes, I will. > > Still, for now, I'm going to make it take an integer argument equal to either > PM_SUSPEND_STANDBY or PM_SUSPEND_MEM, since these are the only two sleep states > known to the core right now. > > I think, however, that in the long run the better solution would be to make > the platform tell the PM core, during the initialization, what system sleep > states are available. Then, before the transition, the PM core will tell the > platform which state is the target one. IMO for this purpose the sleep will > need to be identified in a universal way and perhaps it's a good idea to > discuss that for a while. ;-) A good way to identify a sleep state would be a pointer to a string containing the state's name. The PM core could use these pointers to export the states in sysfs. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
