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Merge back 'pm-domains' material for 3.19-rc1.

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This commit is contained in:
Rafael J. Wysocki 2014-11-18 01:21:39 +01:00
commit 2e015da0d5
3 changed files with 68 additions and 48 deletions
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105
drivers/base/power/domain.c
View File

@ -151,6 +151,59 @@ static void genpd_recalc_cpu_exit_latency(struct generic_pm_domain *genpd)
genpd->cpuidle_data->idle_state->exit_latency = usecs64;
}
static int genpd_power_on(struct generic_pm_domain *genpd)
{
ktime_t time_start;
s64 elapsed_ns;
int ret;
if (!genpd->power_on)
return 0;
time_start = ktime_get();
ret = genpd->power_on(genpd);
if (ret)
return ret;
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
if (elapsed_ns <= genpd->power_on_latency_ns)
return ret;
genpd->power_on_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
genpd_recalc_cpu_exit_latency(genpd);
pr_warn("%s: Power-%s latency exceeded, new value %lld ns\n",
genpd->name, "on", elapsed_ns);
return ret;
}
static int genpd_power_off(struct generic_pm_domain *genpd)
{
ktime_t time_start;
s64 elapsed_ns;
int ret;
if (!genpd->power_off)
return 0;
time_start = ktime_get();
ret = genpd->power_off(genpd);
if (ret == -EBUSY)
return ret;
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
if (elapsed_ns <= genpd->power_off_latency_ns)
return ret;
genpd->power_off_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
pr_warn("%s: Power-%s latency exceeded, new value %lld ns\n",
genpd->name, "off", elapsed_ns);
return ret;
}
/**
* __pm_genpd_poweron - Restore power to a given PM domain and its masters.
* @genpd: PM domain to power up.
@ -222,25 +275,9 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
}
}
if (genpd->power_on) {
ktime_t time_start = ktime_get();
s64 elapsed_ns;
ret = genpd->power_on(genpd);
if (ret)
goto err;
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
if (elapsed_ns > genpd->power_on_latency_ns) {
genpd->power_on_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
genpd_recalc_cpu_exit_latency(genpd);
if (genpd->name)
pr_warning("%s: Power-on latency exceeded, "
"new value %lld ns\n", genpd->name,
elapsed_ns);
}
}
ret = genpd_power_on(genpd);
if (ret)
goto err;
out:
genpd_set_active(genpd);
@ -544,16 +581,11 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
}
if (genpd->power_off) {
ktime_t time_start;
s64 elapsed_ns;
if (atomic_read(&genpd->sd_count) > 0) {
ret = -EBUSY;
goto out;
}
time_start = ktime_get();
/*
* If sd_count > 0 at this point, one of the subdomains hasn't
* managed to call pm_genpd_poweron() for the master yet after
@ -562,21 +594,11 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
* the pm_genpd_poweron() restore power for us (this shouldn't
* happen very often).
*/
ret = genpd->power_off(genpd);
ret = genpd_power_off(genpd);
if (ret == -EBUSY) {
genpd_set_active(genpd);
goto out;
}
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
if (elapsed_ns > genpd->power_off_latency_ns) {
genpd->power_off_latency_ns = elapsed_ns;
genpd->max_off_time_changed = true;
if (genpd->name)
pr_warning("%s: Power-off latency exceeded, "
"new value %lld ns\n", genpd->name,
elapsed_ns);
}
}
genpd->status = GPD_STATE_POWER_OFF;
@ -779,9 +801,9 @@ static inline void genpd_power_off_work_fn(struct work_struct *work) {}
* pm_genpd_present - Check if the given PM domain has been initialized.
* @genpd: PM domain to check.
*/
static bool pm_genpd_present(struct generic_pm_domain *genpd)
static bool pm_genpd_present(const struct generic_pm_domain *genpd)
{
struct generic_pm_domain *gpd;
const struct generic_pm_domain *gpd;
if (IS_ERR_OR_NULL(genpd))
return false;
@ -822,8 +844,7 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd)
|| atomic_read(&genpd->sd_count) > 0)
return;
if (genpd->power_off)
genpd->power_off(genpd);
genpd_power_off(genpd);
genpd->status = GPD_STATE_POWER_OFF;
@ -854,8 +875,7 @@ static void pm_genpd_sync_poweron(struct generic_pm_domain *genpd)
genpd_sd_counter_inc(link->master);
}
if (genpd->power_on)
genpd->power_on(genpd);
genpd_power_on(genpd);
genpd->status = GPD_STATE_ACTIVE;
}
@ -1277,8 +1297,7 @@ static int pm_genpd_restore_noirq(struct device *dev)
* If the domain was off before the hibernation, make
* sure it will be off going forward.
*/
if (genpd->power_off)
genpd->power_off(genpd);
genpd_power_off(genpd);
return 0;
}

6
include/linux/pm.h
View File

@ -538,11 +538,7 @@ enum rpm_request {
};
struct wakeup_source;
struct pm_domain_data {
struct list_head list_node;
struct device *dev;
};
struct pm_domain_data;
struct pm_subsys_data {
spinlock_t lock;

5
include/linux/pm_domain.h
View File

@ -100,6 +100,11 @@ struct gpd_timing_data {
bool cached_stop_ok;
};
struct pm_domain_data {
struct list_head list_node;
struct device *dev;
};
struct generic_pm_domain_data {
struct pm_domain_data base;
struct gpd_timing_data td;