On Monday, August 22, 2011, Kevin Hilman wrote: > jean.pihet@xxxxxxxxxxxxxx writes: > > > From: Jean Pihet <j-pihet@xxxxxx> > > > > High level implementation: > > > > 1. Preparation of the PM QoS for the addition of a device PM QoS constraints > > framework: > > . rename and move of the PM QoS implementation files to kernel/power/qos.c > > and include/linux/pm_qos.h > > . rename of API parameters and internal fields names > > . Move around the PM QoS misc devices management code for better readability > > . re-organize the internal data structs > > . generalize and export the constraints management core code > > > > 2. Implementation of the per-device PM QoS constraints: > > . create drivers/base/power/qos.c for the implementation > > . create a device PM QoS API, which calls the PM QoS constraints management > > core code > > . the per-device latency constraints data strctures are stored in the device > > dev_pm_info struct > > . the device PM code calls the init and destroy of the per-device constraints > > data struct in order to support the dynamic insertion and removal of the > > devices in the system. > > . to minimize the data usage by the per-device constraints, the data struct > > is only allocated at the first call to dev_pm_qos_add_request. The data > > is later free'd when the device is removed from the system > > . per-device notification callbacks can be registered and called upon a > > change to the aggregated constraint value > > . a global mutex protects the constraints users from the data being > > allocated and free'd. > > > > 3. add a global notification mechanism for the device constraints > > . add a global notification chain that gets called upon changes to the > > aggregated constraint value for any device. > > . the notification callbacks are passing the full constraint request data > > in order for the callees to have access to it. The current use is for the > > platform low-level code to access the target device of the constraint > > Reviewed-by: Kevin Hilman <khilman@xxxxxx> I guess that applies to the entire patchset? Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
