On Wed, 6 Oct 2010, Dmitry Torokhov wrote: > > I think this can be solved with pm_runtime, isn't it? Though I am not expert > > at pm_runtime, but this framework can be explored to enable these features. > > I think last time Rafael mentioned that runtime PM did not allow for > forcing power state from userspace but I wonder if it would be possible > for userspace to signal and "accelerate" the idle state for a device and > then standard runtime PM framework would kick in... Yes; drivers can implement their runtime power policy any way they want. For example, a driver could create a sysfs attribute file which userspace could use to ask for changes in the power state. The real question is whether the driver is platform-specific. If it is then fine, it can do whatever it wants. If it isn't then it should try to avoid doing things that are tied to a specific platform. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
