1 files changed, 83 insertions, 93 deletions

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 6471b559230e..967bcf9d415e 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;
@@ -939,8 +964,8 @@ static int genpd_runtime_suspend(struct device *dev)
 		return 0;
 
 	genpd_lock(genpd);
-	gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
 	genpd_power_off(genpd, true, 0);
+	gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
 	genpd_unlock(genpd);
 
 	return 0;
@@ -978,9 +1003,8 @@ static int genpd_runtime_resume(struct device *dev)
 		goto out;
 
 	genpd_lock(genpd);
+	genpd_restore_performance_state(dev, gpd_data->rpm_pstate);
 	ret = genpd_power_on(genpd, 0);
-	if (!ret)
-		genpd_restore_performance_state(dev, gpd_data->rpm_pstate);
 	genpd_unlock(genpd);
 
 	if (ret)
@@ -1018,8 +1042,8 @@ err_stop:
 err_poweroff:
 	if (!pm_runtime_is_irq_safe(dev) || genpd_is_irq_safe(genpd)) {
 		genpd_lock(genpd);
-		gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
 		genpd_power_off(genpd, true, 0);
+		gpd_data->rpm_pstate = genpd_drop_performance_state(dev);
 		genpd_unlock(genpd);
 	}
 
@@ -1189,12 +1213,15 @@ static int genpd_prepare(struct device *dev)
  * genpd_finish_suspend - Completion of suspend or hibernation of device in an
  *   I/O pm domain.
  * @dev: Device to suspend.
- * @poweroff: Specifies if this is a poweroff_noirq or suspend_noirq callback.
+ * @suspend_noirq: Generic suspend_noirq callback.
+ * @resume_noirq: Generic resume_noirq callback.
  *
  * Stop the device and remove power from the domain if all devices in it have
  * been stopped.
  */
-static int genpd_finish_suspend(struct device *dev, bool poweroff)
+static int genpd_finish_suspend(struct device *dev,
+				int (*suspend_noirq)(struct device *dev),
+				int (*resume_noirq)(struct device *dev))
 {
 	struct generic_pm_domain *genpd;
 	int ret = 0;
@@ -1203,10 +1230,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
 	if (IS_ERR(genpd))
 		return -EINVAL;
 
-	if (poweroff)
-		ret = pm_generic_poweroff_noirq(dev);
-	else
-		ret = pm_generic_suspend_noirq(dev);
+	ret = suspend_noirq(dev);
 	if (ret)
 		return ret;
 
@@ -1217,10 +1241,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
 	    !pm_runtime_status_suspended(dev)) {
 		ret = genpd_stop_dev(genpd, dev);
 		if (ret) {
-			if (poweroff)
-				pm_generic_restore_noirq(dev);
-			else
-				pm_generic_resume_noirq(dev);
+			resume_noirq(dev);
 			return ret;
 		}
 	}
@@ -1244,16 +1265,20 @@ static int genpd_suspend_noirq(struct device *dev)
 {
 	dev_dbg(dev, "%s()\n", __func__);
 
-	return genpd_finish_suspend(dev, false);
+	return genpd_finish_suspend(dev,
+				    pm_generic_suspend_noirq,
+				    pm_generic_resume_noirq);
 }
 
 /**
- * genpd_resume_noirq - Start of resume of device in an I/O PM domain.
+ * genpd_finish_resume - Completion of resume of device in an I/O PM domain.
  * @dev: Device to resume.
+ * @resume_noirq: Generic resume_noirq callback.
  *
  * Restore power to the device's PM domain, if necessary, and start the device.
  */
-static int genpd_resume_noirq(struct device *dev)
+static int genpd_finish_resume(struct device *dev,
+			       int (*resume_noirq)(struct device *dev))
 {
 	struct generic_pm_domain *genpd;
 	int ret;
@@ -1265,7 +1290,7 @@ static int genpd_resume_noirq(struct device *dev)
 		return -EINVAL;
 
 	if (device_wakeup_path(dev) && genpd_is_active_wakeup(genpd))
-		return pm_generic_resume_noirq(dev);
+		return resume_noirq(dev);
 
 	genpd_lock(genpd);
 	genpd_sync_power_on(genpd, true, 0);
@@ -1283,6 +1308,19 @@ static int genpd_resume_noirq(struct device *dev)
 }
 
 /**
+ * genpd_resume_noirq - Start of resume of device in an I/O PM domain.
+ * @dev: Device to resume.
+ *
+ * Restore power to the device's PM domain, if necessary, and start the device.
+ */
+static int genpd_resume_noirq(struct device *dev)
+{
+	dev_dbg(dev, "%s()\n", __func__);
+
+	return genpd_finish_resume(dev, pm_generic_resume_noirq);
+}
+
+/**
  * genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
  * @dev: Device to freeze.
  *
@@ -1293,24 +1331,11 @@ static int genpd_resume_noirq(struct device *dev)
  */
 static int genpd_freeze_noirq(struct device *dev)
 {
-	const struct generic_pm_domain *genpd;
-	int ret = 0;
-
 	dev_dbg(dev, "%s()\n", __func__);
 
-	genpd = dev_to_genpd(dev);
-	if (IS_ERR(genpd))
-		return -EINVAL;
-
-	ret = pm_generic_freeze_noirq(dev);
-	if (ret)
-		return ret;
-
-	if (genpd->dev_ops.stop && genpd->dev_ops.start &&
-	    !pm_runtime_status_suspended(dev))
-		ret = genpd_stop_dev(genpd, dev);
-
-	return ret;
+	return genpd_finish_suspend(dev,
+				    pm_generic_freeze_noirq,
+				    pm_generic_thaw_noirq);
 }
 
 /**
@@ -1322,23 +1347,9 @@ static int genpd_freeze_noirq(struct device *dev)
  */
 static int genpd_thaw_noirq(struct device *dev)
 {
-	const struct generic_pm_domain *genpd;
-	int ret = 0;
-
 	dev_dbg(dev, "%s()\n", __func__);
 
-	genpd = dev_to_genpd(dev);
-	if (IS_ERR(genpd))
-		return -EINVAL;
-
-	if (genpd->dev_ops.stop && genpd->dev_ops.start &&
-	    !pm_runtime_status_suspended(dev)) {
-		ret = genpd_start_dev(genpd, dev);
-		if (ret)
-			return ret;
-	}
-
-	return pm_generic_thaw_noirq(dev);
+	return genpd_finish_resume(dev, pm_generic_thaw_noirq);
 }
 
 /**
@@ -1353,7 +1364,9 @@ static int genpd_poweroff_noirq(struct device *dev)
 {
 	dev_dbg(dev, "%s()\n", __func__);
 
-	return genpd_finish_suspend(dev, true);
+	return genpd_finish_suspend(dev,
+				    pm_generic_poweroff_noirq,
+				    pm_generic_restore_noirq);
 }
 
 /**
@@ -1365,40 +1378,9 @@ static int genpd_poweroff_noirq(struct device *dev)
  */
 static int genpd_restore_noirq(struct device *dev)
 {
-	struct generic_pm_domain *genpd;
-	int ret = 0;
-
 	dev_dbg(dev, "%s()\n", __func__);
 
-	genpd = dev_to_genpd(dev);
-	if (IS_ERR(genpd))
-		return -EINVAL;
-
-	/*
-	 * At this point suspended_count == 0 means we are being run for the
-	 * first time for the given domain in the present cycle.
-	 */
-	genpd_lock(genpd);
-	if (genpd->suspended_count++ == 0) {
-		/*
-		 * The boot kernel might put the domain into arbitrary state,
-		 * so make it appear as powered off to genpd_sync_power_on(),
-		 * so that it tries to power it on in case it was really off.
-		 */
-		genpd->status = GENPD_STATE_OFF;
-	}
-
-	genpd_sync_power_on(genpd, true, 0);
-	genpd_unlock(genpd);
-
-	if (genpd->dev_ops.stop && genpd->dev_ops.start &&
-	    !pm_runtime_status_suspended(dev)) {
-		ret = genpd_start_dev(genpd, dev);
-		if (ret)
-			return ret;
-	}
-
-	return pm_generic_restore_noirq(dev);
+	return genpd_finish_resume(dev, pm_generic_restore_noirq);
 }
 
 /**
@@ -1994,6 +1976,7 @@ 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 */
@@ -2749,17 +2732,6 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev,
 	dev->pm_domain->detach = genpd_dev_pm_detach;
 	dev->pm_domain->sync = genpd_dev_pm_sync;
 
-	if (power_on) {
-		genpd_lock(pd);
-		ret = genpd_power_on(pd, 0);
-		genpd_unlock(pd);
-	}
-
-	if (ret) {
-		genpd_remove_device(pd, dev);
-		return -EPROBE_DEFER;
-	}
-
 	/* Set the default performance state */
 	pstate = of_get_required_opp_performance_state(dev->of_node, index);
 	if (pstate < 0 && pstate != -ENODEV && pstate != -EOPNOTSUPP) {
@@ -2771,6 +2743,24 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev,
 			goto err;
 		dev_gpd_data(dev)->default_pstate = pstate;
 	}
+
+	if (power_on) {
+		genpd_lock(pd);
+		ret = genpd_power_on(pd, 0);
+		genpd_unlock(pd);
+	}
+
+	if (ret) {
+		/* Drop the default performance state */
+		if (dev_gpd_data(dev)->default_pstate) {
+			dev_pm_genpd_set_performance_state(dev, 0);
+			dev_gpd_data(dev)->default_pstate = 0;
+		}
+
+		genpd_remove_device(pd, dev);
+		return -EPROBE_DEFER;
+	}
+
 	return 1;
 
 err: