PM / Domains: Add default power off governor function (v4)
Add a function deciding whether or not a given PM domain should
be powered off on the basis of the PM QoS constraints of devices
belonging to it and their PM QoS timing data.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 3af9f5a..9189619 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -398,6 +398,17 @@
}
genpd->status = GPD_STATE_POWER_OFF;
+ genpd->power_off_time = ktime_get();
+
+ /* Update PM QoS information for devices in the domain. */
+ list_for_each_entry_reverse(pdd, &genpd->dev_list, list_node) {
+ struct gpd_timing_data *td = &to_gpd_data(pdd)->td;
+
+ pm_runtime_update_max_time_suspended(pdd->dev,
+ td->start_latency_ns +
+ td->restore_state_latency_ns +
+ genpd->power_on_latency_ns);
+ }
list_for_each_entry(link, &genpd->slave_links, slave_node) {
genpd_sd_counter_dec(link->master);
@@ -1487,6 +1498,7 @@
genpd->resume_count = 0;
genpd->device_count = 0;
genpd->suspended_count = 0;
+ genpd->max_off_time_ns = -1;
genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend;
genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume;
genpd->domain.ops.runtime_idle = pm_generic_runtime_idle;