On Sun, 30 Jan 2011, Rafael J. Wysocki wrote: > Hi, > > This is something we discussed during the last Linux Plumbers Conference. > > The problem appears to be that the same device may be used in different > systems in different configurations such that actions necessary for the > device's power management can vary from one system to another. In those > cases the drivers' power management callbacks are generally not sufficient, > because they can't take the configuration of the whole system into account. > > I think this issue may be addressed by adding objects that will represent > power domains and will provide power management callbacks to be executed > in addition to the device driver's PM callbacks, which is done by the patch > below. > > Please have a look at it and tell me what you think. One thing about this implementation is slightly questionable. The new power_domain callbacks were added to the __weak platform PM routines, which means they will have to be included in every overriding routine provided by a platform imiplementation. Would it be better to separate these things? Have the power_domain callbacks occur in a static outer function which then calls a public __weak inner function that can be overridden? Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
