Hi On Mon, 10 Sep 2012, Jon Hunter wrote: > When CPU-idle is enabled, the MPU sub-system will transition to low power > states during idle periods. If the PMU is active and the MPU sub-system > transitions to a low power state, such as retention, then the PMU context > will be lost and PMU events will stop. To prevent this from happening add a > QoS constraint whenever PMU is active to prevent the MPU sub-system from > transitioning to a low power state. > > By default the PMU QoS constraint is set to -1 so it will not prevent any low > power states and when the PMU is enabled, it is set to 0, so that only C-state > C0 is allowed. I plan to re-visit this and relax the constraint to allow some > low power states, but for now I just wish to ensure PMU is working. > > Cc: Ming Lei <ming.lei@xxxxxxxxxxxxx> > Cc: Will Deacon <will.deacon@xxxxxxx> > Cc: Benoit Cousson <b-cousson@xxxxxx> > Cc: Paul Walmsley <paul@xxxxxxxxx> > Cc: Kevin Hilman <khilman@xxxxxx> > > Signed-off-by: Jon Hunter <jon-hunter@xxxxxx> This one looks like 3.7-rc material, due to the dependency on Will's PMU runtime PM adaptation series, which is unfortunately not yet in the stable merge base that I need to use to send these upstream. Jon, care to update and re-send this one after Linus merges the other PMU patches? - Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
