diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 38 | ||||
| -rw-r--r-- | drivers/base/power/opp.c | 28 |
2 files changed, 53 insertions, 13 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 416720159e96..16550c63d611 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -213,6 +213,18 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool timed) } /** + * genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff(). + * @genpd: PM domait to power off. + * + * Queue up the execution of pm_genpd_poweroff() unless it's already been done + * before. + */ +static void genpd_queue_power_off_work(struct generic_pm_domain *genpd) +{ + queue_work(pm_wq, &genpd->power_off_work); +} + +/** * __pm_genpd_poweron - Restore power to a given PM domain and its masters. * @genpd: PM domain to power up. * @@ -259,8 +271,12 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd) return 0; err: - list_for_each_entry_continue_reverse(link, &genpd->slave_links, slave_node) + list_for_each_entry_continue_reverse(link, + &genpd->slave_links, + slave_node) { genpd_sd_counter_dec(link->master); + genpd_queue_power_off_work(link->master); + } return ret; } @@ -349,18 +365,6 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb, } /** - * genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff(). - * @genpd: PM domait to power off. - * - * Queue up the execution of pm_genpd_poweroff() unless it's already been done - * before. - */ -static void genpd_queue_power_off_work(struct generic_pm_domain *genpd) -{ - queue_work(pm_wq, &genpd->power_off_work); -} - -/** * pm_genpd_poweroff - Remove power from a given PM domain. * @genpd: PM domain to power down. * @@ -1469,6 +1473,13 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, mutex_lock(&genpd->lock); + if (!list_empty(&subdomain->slave_links) || subdomain->device_count) { + pr_warn("%s: unable to remove subdomain %s\n", genpd->name, + subdomain->name); + ret = -EBUSY; + goto out; + } + list_for_each_entry(link, &genpd->master_links, master_node) { if (link->slave != subdomain) continue; @@ -1487,6 +1498,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, break; } +out: mutex_unlock(&genpd->lock); return ret; diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index eb254497a494..28cd75c535b0 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -341,6 +341,34 @@ unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency); /** + * dev_pm_opp_get_suspend_opp() - Get suspend opp + * @dev: device for which we do this operation + * + * Return: This function returns pointer to the suspend opp if it is + * defined and available, otherwise it returns NULL. + * + * Locking: This function must be called under rcu_read_lock(). opp is a rcu + * protected pointer. The reason for the same is that the opp pointer which is + * returned will remain valid for use with opp_get_{voltage, freq} only while + * under the locked area. The pointer returned must be used prior to unlocking + * with rcu_read_unlock() to maintain the integrity of the pointer. + */ +struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev) +{ + struct device_opp *dev_opp; + + opp_rcu_lockdep_assert(); + + dev_opp = _find_device_opp(dev); + if (IS_ERR(dev_opp) || !dev_opp->suspend_opp || + !dev_opp->suspend_opp->available) + return NULL; + + return dev_opp->suspend_opp; +} +EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp); + +/** * dev_pm_opp_get_opp_count() - Get number of opps available in the opp list * @dev: device for which we do this operation * |