Merge branches 'pm-core', 'pm-opp', 'pm-domains', 'pm-cpu' and 'pm-avs'

* pm-core:
  PM / wakeup: Set power.can_wakeup if wakeup_sysfs_add() fails

* pm-opp:
  PM / OPP: Fix get sharing CPUs when hotplug is used
  PM / OPP: OF: Use pr_debug() instead of pr_err() while adding OPP table

* pm-domains:
  PM / Domains: Convert to using %pOF instead of full_name
  PM / Domains: Extend generic power domain debugfs
  PM / Domains: Add time accounting to various genpd states

* pm-cpu:
  PM / CPU: replace raw_notifier with atomic_notifier

* pm-avs:
  PM / AVS: rockchip-io: add io selectors and supplies for RV1108

Documentation/devicetree/bindings/power/rockchip-io-domain.txt

@@ -39,6 +39,8 @@ Required properties:
   - "rockchip,rk3368-pmu-io-voltage-domain" for rk3368 pmu-domains
   - "rockchip,rk3399-io-voltage-domain" for rk3399
   - "rockchip,rk3399-pmu-io-voltage-domain" for rk3399 pmu-domains
+  - "rockchip,rv1108-io-voltage-domain" for rv1108
+  - "rockchip,rv1108-pmu-io-voltage-domain" for rv1108 pmu-domains
 
 Deprecated properties:
 - rockchip,grf: phandle to the syscon managing the "general register files"

drivers/base/power/domain.c

@@ -209,6 +209,34 @@ static void genpd_sd_counter_inc(struct generic_pm_domain *genpd)
 	smp_mb__after_atomic();
 }
 
+#ifdef CONFIG_DEBUG_FS
+static void genpd_update_accounting(struct generic_pm_domain *genpd)
+{
+	ktime_t delta, now;
+
+	now = ktime_get();
+	delta = ktime_sub(now, genpd->accounting_time);
+
+	/*
+	 * If genpd->status is active, it means we are just
+	 * out of off and so update the idle time and vice
+	 * versa.
+	 */
+	if (genpd->status == GPD_STATE_ACTIVE) {
+		int state_idx = genpd->state_idx;
+
+		genpd->states[state_idx].idle_time =
+			ktime_add(genpd->states[state_idx].idle_time, delta);
+	} else {
+		genpd->on_time = ktime_add(genpd->on_time, delta);
+	}
+
+	genpd->accounting_time = now;
+}
+#else
+static inline void genpd_update_accounting(struct generic_pm_domain *genpd) {}
+#endif
+
 static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
 {
 	unsigned int state_idx = genpd->state_idx;
@@ -361,6 +389,7 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
 	}
 
 	genpd->status = GPD_STATE_POWER_OFF;
+	genpd_update_accounting(genpd);
 
 	list_for_each_entry(link, &genpd->slave_links, slave_node) {
 		genpd_sd_counter_dec(link->master);
@@ -413,6 +442,8 @@ static int genpd_power_on(struct generic_pm_domain *genpd, unsigned int depth)
 		goto err;
 
 	genpd->status = GPD_STATE_ACTIVE;
+	genpd_update_accounting(genpd);
+
 	return 0;
 
  err:
@@ -1540,6 +1571,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 	genpd->max_off_time_changed = true;
 	genpd->provider = NULL;
 	genpd->has_provider = false;
+	genpd->accounting_time = ktime_get();
 	genpd->domain.ops.runtime_suspend = genpd_runtime_suspend;
 	genpd->domain.ops.runtime_resume = genpd_runtime_resume;
 	genpd->domain.ops.prepare = pm_genpd_prepare;
@@ -1743,7 +1775,7 @@ static int genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
 	mutex_lock(&of_genpd_mutex);
 	list_add(&cp->link, &of_genpd_providers);
 	mutex_unlock(&of_genpd_mutex);
-	pr_debug("Added domain provider from %s\n", np->full_name);
+	pr_debug("Added domain provider from %pOF\n", np);
 
 	return 0;
 }
@@ -2149,16 +2181,16 @@ static int genpd_parse_state(struct genpd_power_state *genpd_state,
 	err = of_property_read_u32(state_node, "entry-latency-us",
 						&entry_latency);
 	if (err) {
-		pr_debug(" * %s missing entry-latency-us property\n",
-						state_node->full_name);
+		pr_debug(" * %pOF missing entry-latency-us property\n",
+						state_node);
 		return -EINVAL;
 	}
 
 	err = of_property_read_u32(state_node, "exit-latency-us",
 						&exit_latency);
 	if (err) {
-		pr_debug(" * %s missing exit-latency-us property\n",
-						state_node->full_name);
+		pr_debug(" * %pOF missing exit-latency-us property\n",
+						state_node);
 		return -EINVAL;
 	}
 
@@ -2212,8 +2244,8 @@ int of_genpd_parse_idle_states(struct device_node *dn,
 		ret = genpd_parse_state(&st[i++], np);
 		if (ret) {
 			pr_err
-			("Parsing idle state node %s failed with err %d\n",
-							np->full_name, ret);
+			("Parsing idle state node %pOF failed with err %d\n",
+							np, ret);
 			of_node_put(np);
 			kfree(st);
 			return ret;
@@ -2327,7 +2359,7 @@ exit:
 	return 0;
 }
 
-static int pm_genpd_summary_show(struct seq_file *s, void *data)
+static int genpd_summary_show(struct seq_file *s, void *data)
 {
 	struct generic_pm_domain *genpd;
 	int ret = 0;
@@ -2350,21 +2382,187 @@ static int pm_genpd_summary_show(struct seq_file *s, void *data)
 	return ret;
 }
 
-static int pm_genpd_summary_open(struct inode *inode, struct file *file)
+static int genpd_status_show(struct seq_file *s, void *data)
 {
-	return single_open(file, pm_genpd_summary_show, NULL);
+	static const char * const status_lookup[] = {
+		[GPD_STATE_ACTIVE] = "on",
+		[GPD_STATE_POWER_OFF] = "off"
+	};
+
+	struct generic_pm_domain *genpd = s->private;
+	int ret = 0;
+
+	ret = genpd_lock_interruptible(genpd);
+	if (ret)
+		return -ERESTARTSYS;
+
+	if (WARN_ON_ONCE(genpd->status >= ARRAY_SIZE(status_lookup)))
+		goto exit;
+
+	if (genpd->status == GPD_STATE_POWER_OFF)
+		seq_printf(s, "%s-%u\n", status_lookup[genpd->status],
+			genpd->state_idx);
+	else
+		seq_printf(s, "%s\n", status_lookup[genpd->status]);
+exit:
+	genpd_unlock(genpd);
+	return ret;
 }
 
-static const struct file_operations pm_genpd_summary_fops = {
-	.open = pm_genpd_summary_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
+static int genpd_sub_domains_show(struct seq_file *s, void *data)
+{
+	struct generic_pm_domain *genpd = s->private;
+	struct gpd_link *link;
+	int ret = 0;
+
+	ret = genpd_lock_interruptible(genpd);
+	if (ret)
+		return -ERESTARTSYS;
+
+	list_for_each_entry(link, &genpd->master_links, master_node)
+		seq_printf(s, "%s\n", link->slave->name);
+
+	genpd_unlock(genpd);
+	return ret;
+}
+
+static int genpd_idle_states_show(struct seq_file *s, void *data)
+{
+	struct generic_pm_domain *genpd = s->private;
+	unsigned int i;
+	int ret = 0;
+
+	ret = genpd_lock_interruptible(genpd);
+	if (ret)
+		return -ERESTARTSYS;
+
+	seq_puts(s, "State          Time Spent(ms)\n");
+
+	for (i = 0; i < genpd->state_count; i++) {
+		ktime_t delta = 0;
+		s64 msecs;
+
+		if ((genpd->status == GPD_STATE_POWER_OFF) &&
+				(genpd->state_idx == i))
+			delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+		msecs = ktime_to_ms(
+			ktime_add(genpd->states[i].idle_time, delta));
+		seq_printf(s, "S%-13i %lld\n", i, msecs);
+	}
+
+	genpd_unlock(genpd);
+	return ret;
+}
+
+static int genpd_active_time_show(struct seq_file *s, void *data)
+{
+	struct generic_pm_domain *genpd = s->private;
+	ktime_t delta = 0;
+	int ret = 0;
+
+	ret = genpd_lock_interruptible(genpd);
+	if (ret)
+		return -ERESTARTSYS;
+
+	if (genpd->status == GPD_STATE_ACTIVE)
+		delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+	seq_printf(s, "%lld ms\n", ktime_to_ms(
+				ktime_add(genpd->on_time, delta)));
+
+	genpd_unlock(genpd);
+	return ret;
+}
+
+static int genpd_total_idle_time_show(struct seq_file *s, void *data)
+{
+	struct generic_pm_domain *genpd = s->private;
+	ktime_t delta = 0, total = 0;
+	unsigned int i;
+	int ret = 0;
+
+	ret = genpd_lock_interruptible(genpd);
+	if (ret)
+		return -ERESTARTSYS;
+
+	for (i = 0; i < genpd->state_count; i++) {
+
+		if ((genpd->status == GPD_STATE_POWER_OFF) &&
+				(genpd->state_idx == i))
+			delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+		total = ktime_add(total, genpd->states[i].idle_time);
+	}
+	total = ktime_add(total, delta);
+
+	seq_printf(s, "%lld ms\n", ktime_to_ms(total));
+
+	genpd_unlock(genpd);
+	return ret;
+}
+
+
+static int genpd_devices_show(struct seq_file *s, void *data)
+{
+	struct generic_pm_domain *genpd = s->private;
+	struct pm_domain_data *pm_data;
+	const char *kobj_path;
+	int ret = 0;
+
+	ret = genpd_lock_interruptible(genpd);
+	if (ret)
+		return -ERESTARTSYS;
+
+	list_for_each_entry(pm_data, &genpd->dev_list, list_node) {
+		kobj_path = kobject_get_path(&pm_data->dev->kobj,
+				genpd_is_irq_safe(genpd) ?
+				GFP_ATOMIC : GFP_KERNEL);
+		if (kobj_path == NULL)
+			continue;
+
+		seq_printf(s, "%s\n", kobj_path);
+		kfree(kobj_path);
+	}
+
+	genpd_unlock(genpd);
+	return ret;
+}
+
+#define define_genpd_open_function(name) \
+static int genpd_##name##_open(struct inode *inode, struct file *file) \
+{ \
+	return single_open(file, genpd_##name##_show, inode->i_private); \
+}
+
+define_genpd_open_function(summary);
+define_genpd_open_function(status);
+define_genpd_open_function(sub_domains);
+define_genpd_open_function(idle_states);
+define_genpd_open_function(active_time);
+define_genpd_open_function(total_idle_time);
+define_genpd_open_function(devices);
+
+#define define_genpd_debugfs_fops(name) \
+static const struct file_operations genpd_##name##_fops = { \
+	.open = genpd_##name##_open, \
+	.read = seq_read, \
+	.llseek = seq_lseek, \
+	.release = single_release, \
+}
+
+define_genpd_debugfs_fops(summary);
+define_genpd_debugfs_fops(status);
+define_genpd_debugfs_fops(sub_domains);
+define_genpd_debugfs_fops(idle_states);
+define_genpd_debugfs_fops(active_time);
+define_genpd_debugfs_fops(total_idle_time);
+define_genpd_debugfs_fops(devices);
 
 static int __init pm_genpd_debug_init(void)
 {
 	struct dentry *d;
+	struct generic_pm_domain *genpd;
 
 	pm_genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
 
@@ -2372,10 +2570,29 @@ static int __init pm_genpd_debug_init(void)
 		return -ENOMEM;
 
 	d = debugfs_create_file("pm_genpd_summary", S_IRUGO,
-			pm_genpd_debugfs_dir, NULL, &pm_genpd_summary_fops);
+			pm_genpd_debugfs_dir, NULL, &genpd_summary_fops);
 	if (!d)
 		return -ENOMEM;
 
+	list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
+		d = debugfs_create_dir(genpd->name, pm_genpd_debugfs_dir);
+		if (!d)
+			return -ENOMEM;
+
+		debugfs_create_file("current_state", 0444,
+				d, genpd, &genpd_status_fops);
+		debugfs_create_file("sub_domains", 0444,
+				d, genpd, &genpd_sub_domains_fops);
+		debugfs_create_file("idle_states", 0444,
+				d, genpd, &genpd_idle_states_fops);
+		debugfs_create_file("active_time", 0444,
+				d, genpd, &genpd_active_time_fops);
+		debugfs_create_file("total_idle_time", 0444,
+				d, genpd, &genpd_total_idle_time_fops);
+		debugfs_create_file("devices", 0444,
+				d, genpd, &genpd_devices_fops);
+	}
+
 	return 0;
 }
 late_initcall(pm_genpd_debug_init);

drivers/base/power/opp/of.c

@@ -248,15 +248,22 @@ void dev_pm_opp_of_remove_table(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
 
-/* Returns opp descriptor node for a device, caller must do of_node_put() */
-struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
+/* Returns opp descriptor node for a device node, caller must
+ * do of_node_put() */
+static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np)
 {
 	/*
 	 * There should be only ONE phandle present in "operating-points-v2"
 	 * property.
 	 */
 
-	return of_parse_phandle(dev->of_node, "operating-points-v2", 0);
+	return of_parse_phandle(np, "operating-points-v2", 0);
+}
+
+/* Returns opp descriptor node for a device, caller must do of_node_put() */
+struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
+{
+	return _opp_of_get_opp_desc_node(dev->of_node);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
 
@@ -539,8 +546,12 @@ int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
 
 		ret = dev_pm_opp_of_add_table(cpu_dev);
 		if (ret) {
-			pr_err("%s: couldn't find opp table for cpu:%d, %d\n",
-			       __func__, cpu, ret);
+			/*
+			 * OPP may get registered dynamically, don't print error
+			 * message here.
+			 */
+			pr_debug("%s: couldn't find opp table for cpu:%d, %d\n",
+				 __func__, cpu, ret);
 
 			/* Free all other OPPs */
 			dev_pm_opp_of_cpumask_remove_table(cpumask);
@@ -572,8 +583,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_add_table);
 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
 				   struct cpumask *cpumask)
 {
-	struct device_node *np, *tmp_np;
-	struct device *tcpu_dev;
+	struct device_node *np, *tmp_np, *cpu_np;
 	int cpu, ret = 0;
 
 	/* Get OPP descriptor node */
@@ -593,19 +603,18 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
 		if (cpu == cpu_dev->id)
 			continue;
 
-		tcpu_dev = get_cpu_device(cpu);
-		if (!tcpu_dev) {
-			dev_err(cpu_dev, "%s: failed to get cpu%d device\n",
+		cpu_np = of_get_cpu_node(cpu, NULL);
+		if (!cpu_np) {
+			dev_err(cpu_dev, "%s: failed to get cpu%d node\n",
 				__func__, cpu);
-			ret = -ENODEV;
+			ret = -ENOENT;
 			goto put_cpu_node;
 		}
 
 		/* Get OPP descriptor node */
-		tmp_np = dev_pm_opp_of_get_opp_desc_node(tcpu_dev);
+		tmp_np = _opp_of_get_opp_desc_node(cpu_np);
 		if (!tmp_np) {
-			dev_err(tcpu_dev, "%s: Couldn't find opp node.\n",
-				__func__);
+			pr_err("%pOF: Couldn't find opp node\n", cpu_np);
 			ret = -ENOENT;
 			goto put_cpu_node;
 		}

drivers/base/power/wakeup.c

@@ -412,15 +412,17 @@ void device_set_wakeup_capable(struct device *dev, bool capable)
 	if (!!dev->power.can_wakeup == !!capable)
 		return;
 
+	dev->power.can_wakeup = capable;
 	if (device_is_registered(dev) && !list_empty(&dev->power.entry)) {
 		if (capable) {
-			if (wakeup_sysfs_add(dev))
-				return;
+			int ret = wakeup_sysfs_add(dev);
+
+			if (ret)
+				dev_info(dev, "Wakeup sysfs attributes not added\n");
 		} else {
 			wakeup_sysfs_remove(dev);
 		}
 	}
-	dev->power.can_wakeup = capable;
 }
 EXPORT_SYMBOL_GPL(device_set_wakeup_capable);
 

drivers/power/avs/rockchip-io-domain.c

@@ -349,6 +349,36 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3399_pmu = {
 	.init = rk3399_pmu_iodomain_init,
 };
 
+static const struct rockchip_iodomain_soc_data soc_data_rv1108 = {
+	.grf_offset = 0x404,
+	.supply_names = {
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		"vccio1",
+		"vccio2",
+		"vccio3",
+		"vccio5",
+		"vccio6",
+	},
+
+};
+
+static const struct rockchip_iodomain_soc_data soc_data_rv1108_pmu = {
+	.grf_offset = 0x104,
+	.supply_names = {
+		"pmu",
+	},
+};
+
 static const struct of_device_id rockchip_iodomain_match[] = {
 	{
 		.compatible = "rockchip,rk3188-io-voltage-domain",
@@ -382,6 +412,14 @@ static const struct of_device_id rockchip_iodomain_match[] = {
 		.compatible = "rockchip,rk3399-pmu-io-voltage-domain",
 		.data = (void *)&soc_data_rk3399_pmu
 	},
+	{
+		.compatible = "rockchip,rv1108-io-voltage-domain",
+		.data = (void *)&soc_data_rv1108
+	},
+	{
+		.compatible = "rockchip,rv1108-pmu-io-voltage-domain",
+		.data = (void *)&soc_data_rv1108_pmu
+	},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, rockchip_iodomain_match);

include/linux/pm_domain.h

@@ -43,6 +43,7 @@ struct genpd_power_state {
 	s64 power_on_latency_ns;
 	s64 residency_ns;
 	struct fwnode_handle *fwnode;
+	ktime_t idle_time;
 };
 
 struct genpd_lock_ops;
@@ -78,6 +79,8 @@ struct generic_pm_domain {
 	unsigned int state_count; /* number of states */
 	unsigned int state_idx; /* state that genpd will go to when off */
 	void *free; /* Free the state that was allocated for default */
+	ktime_t on_time;
+	ktime_t accounting_time;
 	const struct genpd_lock_ops *lock_ops;
 	union {
 		struct mutex mlock;

kernel/cpu_pm.c

@@ -22,15 +22,21 @@
 #include <linux/spinlock.h>
 #include <linux/syscore_ops.h>
 
-static DEFINE_RWLOCK(cpu_pm_notifier_lock);
-static RAW_NOTIFIER_HEAD(cpu_pm_notifier_chain);
+static ATOMIC_NOTIFIER_HEAD(cpu_pm_notifier_chain);
 
 static int cpu_pm_notify(enum cpu_pm_event event, int nr_to_call, int *nr_calls)
 {
 	int ret;
 
-	ret = __raw_notifier_call_chain(&cpu_pm_notifier_chain, event, NULL,
+	/*
+	 * __atomic_notifier_call_chain has a RCU read critical section, which
+	 * could be disfunctional in cpu idle. Copy RCU_NONIDLE code to let
+	 * RCU know this.
+	 */
+	rcu_irq_enter_irqson();
+	ret = __atomic_notifier_call_chain(&cpu_pm_notifier_chain, event, NULL,
 		nr_to_call, nr_calls);
+	rcu_irq_exit_irqson();
 
 	return notifier_to_errno(ret);
 }
@@ -47,14 +53,7 @@ static int cpu_pm_notify(enum cpu_pm_event event, int nr_to_call, int *nr_calls)
  */
 int cpu_pm_register_notifier(struct notifier_block *nb)
 {
-	unsigned long flags;
-	int ret;
-
-	write_lock_irqsave(&cpu_pm_notifier_lock, flags);
-	ret = raw_notifier_chain_register(&cpu_pm_notifier_chain, nb);
-	write_unlock_irqrestore(&cpu_pm_notifier_lock, flags);
-
-	return ret;
+	return atomic_notifier_chain_register(&cpu_pm_notifier_chain, nb);
 }
 EXPORT_SYMBOL_GPL(cpu_pm_register_notifier);
 
@@ -69,14 +68,7 @@ EXPORT_SYMBOL_GPL(cpu_pm_register_notifier);
  */
 int cpu_pm_unregister_notifier(struct notifier_block *nb)
 {
-	unsigned long flags;
-	int ret;
-
-	write_lock_irqsave(&cpu_pm_notifier_lock, flags);
-	ret = raw_notifier_chain_unregister(&cpu_pm_notifier_chain, nb);
-	write_unlock_irqrestore(&cpu_pm_notifier_lock, flags);
-
-	return ret;
+	return atomic_notifier_chain_unregister(&cpu_pm_notifier_chain, nb);
 }
 EXPORT_SYMBOL_GPL(cpu_pm_unregister_notifier);
 
@@ -100,7 +92,6 @@ int cpu_pm_enter(void)
 	int nr_calls;
 	int ret = 0;
 
-	read_lock(&cpu_pm_notifier_lock);
 	ret = cpu_pm_notify(CPU_PM_ENTER, -1, &nr_calls);
 	if (ret)
 		/*
@@ -108,7 +99,6 @@ int cpu_pm_enter(void)
 		 * PM entry who are notified earlier to prepare for it.
 		 */
 		cpu_pm_notify(CPU_PM_ENTER_FAILED, nr_calls - 1, NULL);
-	read_unlock(&cpu_pm_notifier_lock);
 
 	return ret;
 }
@@ -128,13 +118,7 @@ EXPORT_SYMBOL_GPL(cpu_pm_enter);
  */
 int cpu_pm_exit(void)
 {
-	int ret;
-
-	read_lock(&cpu_pm_notifier_lock);
-	ret = cpu_pm_notify(CPU_PM_EXIT, -1, NULL);
-	read_unlock(&cpu_pm_notifier_lock);
-
-	return ret;
+	return cpu_pm_notify(CPU_PM_EXIT, -1, NULL);
 }
 EXPORT_SYMBOL_GPL(cpu_pm_exit);
 
@@ -159,7 +143,6 @@ int cpu_cluster_pm_enter(void)
 	int nr_calls;
 	int ret = 0;
 
-	read_lock(&cpu_pm_notifier_lock);
 	ret = cpu_pm_notify(CPU_CLUSTER_PM_ENTER, -1, &nr_calls);
 	if (ret)
 		/*
@@ -167,7 +150,6 @@ int cpu_cluster_pm_enter(void)
 		 * PM entry who are notified earlier to prepare for it.
 		 */
 		cpu_pm_notify(CPU_CLUSTER_PM_ENTER_FAILED, nr_calls - 1, NULL);
-	read_unlock(&cpu_pm_notifier_lock);
 
 	return ret;
 }
@@ -190,13 +172,7 @@ EXPORT_SYMBOL_GPL(cpu_cluster_pm_enter);
  */
 int cpu_cluster_pm_exit(void)
 {
-	int ret;
-
-	read_lock(&cpu_pm_notifier_lock);
-	ret = cpu_pm_notify(CPU_CLUSTER_PM_EXIT, -1, NULL);
-	read_unlock(&cpu_pm_notifier_lock);
-
-	return ret;
+	return cpu_pm_notify(CPU_CLUSTER_PM_EXIT, -1, NULL);
 }
 EXPORT_SYMBOL_GPL(cpu_cluster_pm_exit);