diff options
| -rw-r--r-- | drivers/base/power/domain.c | 26 | ||||
| -rw-r--r-- | drivers/base/power/domain_governor.c | 3 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 7 |
3 files changed, 36 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index ead135c7044c..c2dec386c72e 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -494,6 +494,31 @@ void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next) } EXPORT_SYMBOL_GPL(dev_pm_genpd_set_next_wakeup); +/** + * dev_pm_genpd_get_next_hrtimer - Return the next_hrtimer for the genpd + * @dev: A device that is attached to the genpd. + * + * This routine should typically be called for a device, at the point of when a + * GENPD_NOTIFY_PRE_OFF notification has been sent for it. + * + * Returns the aggregated value of the genpd's next hrtimer or KTIME_MAX if no + * valid value have been set. + */ +ktime_t dev_pm_genpd_get_next_hrtimer(struct device *dev) +{ + struct generic_pm_domain *genpd; + + genpd = dev_to_genpd_safe(dev); + if (!genpd) + return KTIME_MAX; + + if (genpd->gd) + return genpd->gd->next_hrtimer; + + return KTIME_MAX; +} +EXPORT_SYMBOL_GPL(dev_pm_genpd_get_next_hrtimer); + static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed) { unsigned int state_idx = genpd->state_idx; @@ -1994,6 +2019,7 @@ static int genpd_alloc_data(struct generic_pm_domain *genpd) gd->max_off_time_ns = -1; gd->max_off_time_changed = true; gd->next_wakeup = KTIME_MAX; + gd->next_hrtimer = KTIME_MAX; } /* Use only one "off" state if there were no states declared */ diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c index 282a3a135827..cc2c3a5a6d35 100644 --- a/drivers/base/power/domain_governor.c +++ b/drivers/base/power/domain_governor.c @@ -375,6 +375,9 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd) if (idle_duration_ns <= 0) return false; + /* Store the next domain_wakeup to allow consumers to use it. */ + genpd->gd->next_hrtimer = domain_wakeup; + /* * Find the deepest idle state that has its residency value satisfied * and by also taking into account the power off latency for the state. diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index ebc351698090..1cd41bdf73cf 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -17,6 +17,7 @@ #include <linux/notifier.h> #include <linux/spinlock.h> #include <linux/cpumask.h> +#include <linux/time64.h> /* * Flags to control the behaviour of a genpd. @@ -95,6 +96,7 @@ struct genpd_governor_data { s64 max_off_time_ns; bool max_off_time_changed; ktime_t next_wakeup; + ktime_t next_hrtimer; bool cached_power_down_ok; bool cached_power_down_state_idx; }; @@ -232,6 +234,7 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state); int dev_pm_genpd_add_notifier(struct device *dev, struct notifier_block *nb); int dev_pm_genpd_remove_notifier(struct device *dev); void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next); +ktime_t dev_pm_genpd_get_next_hrtimer(struct device *dev); extern struct dev_power_governor simple_qos_governor; extern struct dev_power_governor pm_domain_always_on_gov; @@ -293,6 +296,10 @@ static inline int dev_pm_genpd_remove_notifier(struct device *dev) static inline void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next) { } +static inline ktime_t dev_pm_genpd_get_next_hrtimer(struct device *dev) +{ + return KTIME_MAX; +} #define simple_qos_governor (*(struct dev_power_governor *)(NULL)) #define pm_domain_always_on_gov (*(struct dev_power_governor *)(NULL)) #endif |