#include <linux/sched.h>
#include <linux/suspend.h>
+static LIST_HEAD(gpd_list);
+static DEFINE_MUTEX(gpd_list_lock);
+
#ifdef CONFIG_PM
static struct generic_pm_domain *dev_to_genpd(struct device *dev)
* 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)
+void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
{
if (!work_pending(&genpd->power_off_work))
queue_work(pm_wq, &genpd->power_off_work);
genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq;
genpd->domain.ops.restore = pm_genpd_restore;
genpd->domain.ops.complete = pm_genpd_complete;
+ mutex_lock(&gpd_list_lock);
+ list_add(&genpd->gpd_list_node, &gpd_list);
+ mutex_unlock(&gpd_list_lock);
+}
+
+/**
+ * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use.
+ */
+void pm_genpd_poweroff_unused(void)
+{
+ struct generic_pm_domain *genpd;
+
+ mutex_lock(&gpd_list_lock);
+
+ list_for_each_entry(genpd, &gpd_list, gpd_list_node)
+ genpd_queue_power_off_work(genpd);
+
+ mutex_unlock(&gpd_list_lock);
}