Hi Paul,

On 09/20/2012 12:14 PM, Paul Walmsley wrote:

Hi

On Mon, 10 Sep 2012, Jon Hunter wrote:

quoted

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 <redacted>
Cc: Will Deacon <redacted>
Cc: Benoit Cousson <redacted>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <redacted>

Signed-off-by: Jon Hunter <redacted>

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?

Yes no problem. Will send out during the 3.7-rc.

Cheers
Jon