include/linux/pm_runtime.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * pm_runtime.h - Device run-time power management helper functions.
  *
  * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
  */

 #ifndef _LINUX_PM_RUNTIME_H
 #define _LINUX_PM_RUNTIME_H

 #include <linux/device.h>
 #include <linux/notifier.h>
 #include <linux/pm.h>

 #include <linux/jiffies.h>

 /* Runtime PM flag argument bits */
 #define RPM_ASYNC		0x01	/* Request is asynchronous */
 #define RPM_NOWAIT		0x02	/* Don't wait for concurrent
 					    state change */
 #define RPM_GET_PUT		0x04	/* Increment/decrement the
 					    usage_count */
 #define RPM_AUTO		0x08	/* Use autosuspend_delay */

 /*
  * Use this for defining a set of PM operations to be used in all situations
  * (system suspend, hibernation or runtime PM).
  *
  * Note that the behaviour differs from the deprecated UNIVERSAL_DEV_PM_OPS()
  * macro, which uses the provided callbacks for both runtime PM and system
  * sleep, while DEFINE_RUNTIME_DEV_PM_OPS() uses pm_runtime_force_suspend()
  * and pm_runtime_force_resume() for its system sleep callbacks.
  *
  * If the underlying dev_pm_ops struct symbol has to be exported, use
  * EXPORT_RUNTIME_DEV_PM_OPS() or EXPORT_GPL_RUNTIME_DEV_PM_OPS() instead.
  */
 #define DEFINE_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
 	_DEFINE_DEV_PM_OPS(name, pm_runtime_force_suspend, \
 			   pm_runtime_force_resume, suspend_fn, \
 			   resume_fn, idle_fn)

 #define EXPORT_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
 	EXPORT_DEV_PM_OPS(name) = { \
 		RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
 	}
 #define EXPORT_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
 	EXPORT_GPL_DEV_PM_OPS(name) = { \
 		RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
 	}
 #define EXPORT_NS_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
 	EXPORT_NS_DEV_PM_OPS(name, ns) = { \
 		RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
 	}
 #define EXPORT_NS_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
 	EXPORT_NS_GPL_DEV_PM_OPS(name, ns) = { \
 		RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
 	}

 #ifdef CONFIG_PM
 extern struct workqueue_struct *pm_wq;

 static inline bool queue_pm_work(struct work_struct *work)
 {
 	return queue_work(pm_wq, work);
 }

 extern int pm_generic_runtime_suspend(struct device *dev);
 extern int pm_generic_runtime_resume(struct device *dev);
 extern int pm_runtime_force_suspend(struct device *dev);
 extern int pm_runtime_force_resume(struct device *dev);

 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
 extern int pm_runtime_get_if_active(struct device *dev);
 extern int pm_runtime_get_if_in_use(struct device *dev);
 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
 extern int pm_runtime_barrier(struct device *dev);
 extern void pm_runtime_enable(struct device *dev);
 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
 extern void pm_runtime_allow(struct device *dev);
 extern void pm_runtime_forbid(struct device *dev);
 extern void pm_runtime_no_callbacks(struct device *dev);
 extern void pm_runtime_irq_safe(struct device *dev);
 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
 extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
 extern void pm_runtime_get_suppliers(struct device *dev);
 extern void pm_runtime_put_suppliers(struct device *dev);
 extern void pm_runtime_new_link(struct device *dev);
 extern void pm_runtime_drop_link(struct device_link *link);
 extern void pm_runtime_release_supplier(struct device_link *link);

 extern int devm_pm_runtime_enable(struct device *dev);

 /**
  * pm_suspend_ignore_children - Set runtime PM behavior regarding children.
  * @dev: Target device.
  * @enable: Whether or not to ignore possible dependencies on children.
  *
  * The dependencies of @dev on its children will not be taken into account by
  * the runtime PM framework going forward if @enable is %true, or they will
  * be taken into account otherwise.
  */
 static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
 {
 	dev->power.ignore_children = enable;
 }

 /**
  * pm_runtime_get_noresume - Bump up runtime PM usage counter of a device.
  * @dev: Target device.
  */
 static inline void pm_runtime_get_noresume(struct device *dev)
 {
 	atomic_inc(&dev->power.usage_count);
 }

 /**
  * pm_runtime_put_noidle - Drop runtime PM usage counter of a device.
  * @dev: Target device.
  *
  * Decrement the runtime PM usage counter of @dev unless it is 0 already.
  */
 static inline void pm_runtime_put_noidle(struct device *dev)
 {
 	atomic_add_unless(&dev->power.usage_count, -1, 0);
 }

 /**
  * pm_runtime_suspended - Check whether or not a device is runtime-suspended.
  * @dev: Target device.
  *
  * Return %true if runtime PM is enabled for @dev and its runtime PM status is
  * %RPM_SUSPENDED, or %false otherwise.
  *
  * Note that the return value of this function can only be trusted if it is
  * called under the runtime PM lock of @dev or under conditions in which
  * runtime PM cannot be either disabled or enabled for @dev and its runtime PM
  * status cannot change.
  */
 static inline bool pm_runtime_suspended(struct device *dev)
 {
 	return dev->power.runtime_status == RPM_SUSPENDED
 		&& !dev->power.disable_depth;
 }

 /**
  * pm_runtime_active - Check whether or not a device is runtime-active.
  * @dev: Target device.
  *
  * Return %true if runtime PM is disabled for @dev or its runtime PM status is
  * %RPM_ACTIVE, or %false otherwise.
  *
  * Note that the return value of this function can only be trusted if it is
  * called under the runtime PM lock of @dev or under conditions in which
  * runtime PM cannot be either disabled or enabled for @dev and its runtime PM
  * status cannot change.
  */
 static inline bool pm_runtime_active(struct device *dev)
 {
 	return dev->power.runtime_status == RPM_ACTIVE
 		|| dev->power.disable_depth;
 }

 /**
  * pm_runtime_status_suspended - Check if runtime PM status is "suspended".
  * @dev: Target device.
  *
  * Return %true if the runtime PM status of @dev is %RPM_SUSPENDED, or %false
  * otherwise, regardless of whether or not runtime PM has been enabled for @dev.
  *
  * Note that the return value of this function can only be trusted if it is
  * called under the runtime PM lock of @dev or under conditions in which the
  * runtime PM status of @dev cannot change.
  */
 static inline bool pm_runtime_status_suspended(struct device *dev)
 {
 	return dev->power.runtime_status == RPM_SUSPENDED;
 }

 /**
  * pm_runtime_enabled - Check if runtime PM is enabled.
  * @dev: Target device.
  *
  * Return %true if runtime PM is enabled for @dev or %false otherwise.
  *
  * Note that the return value of this function can only be trusted if it is
  * called under the runtime PM lock of @dev or under conditions in which
  * runtime PM cannot be either disabled or enabled for @dev.
  */
 static inline bool pm_runtime_enabled(struct device *dev)
 {
 	return !dev->power.disable_depth;
 }

 /**
  * pm_runtime_has_no_callbacks - Check if runtime PM callbacks may be present.
  * @dev: Target device.
  *
  * Return %true if @dev is a special device without runtime PM callbacks or
  * %false otherwise.
  */
 static inline bool pm_runtime_has_no_callbacks(struct device *dev)
 {
 	return dev->power.no_callbacks;
 }

 /**
  * pm_runtime_mark_last_busy - Update the last access time of a device.
  * @dev: Target device.
  *
  * Update the last access time of @dev used by the runtime PM autosuspend
  * mechanism to the current time as returned by ktime_get_mono_fast_ns().
  */
 static inline void pm_runtime_mark_last_busy(struct device *dev)
 {
 	WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
 }

 /**
  * pm_runtime_is_irq_safe - Check if runtime PM can work in interrupt context.
  * @dev: Target device.
  *
  * Return %true if @dev has been marked as an "IRQ-safe" device (with respect
  * to runtime PM), in which case its runtime PM callabcks can be expected to
  * work correctly when invoked from interrupt handlers.
  */
 static inline bool pm_runtime_is_irq_safe(struct device *dev)
 {
 	return dev->power.irq_safe;
 }

 extern u64 pm_runtime_suspended_time(struct device *dev);

 #else /* !CONFIG_PM */

 static inline bool queue_pm_work(struct work_struct *work) { return false; }

 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
 static inline int pm_runtime_force_resume(struct device *dev) { return 0; }

 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
 {
 	return -ENOSYS;
 }
 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
 {
 	return -ENOSYS;
 }
 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
 {
 	return 1;
 }
 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
 {
 	return -ENOSYS;
 }
 static inline int pm_runtime_get_if_in_use(struct device *dev)
 {
 	return -EINVAL;
 }
 static inline int pm_runtime_get_if_active(struct device *dev)
 {
 	return -EINVAL;
 }
 static inline int __pm_runtime_set_status(struct device *dev,
 					    unsigned int status) { return 0; }
 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
 static inline void pm_runtime_enable(struct device *dev) {}
 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
 static inline void pm_runtime_allow(struct device *dev) {}
 static inline void pm_runtime_forbid(struct device *dev) {}

 static inline int devm_pm_runtime_enable(struct device *dev) { return 0; }

 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
 static inline void pm_runtime_get_noresume(struct device *dev) {}
 static inline void pm_runtime_put_noidle(struct device *dev) {}
 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
 static inline bool pm_runtime_active(struct device *dev) { return true; }
 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
 static inline bool pm_runtime_enabled(struct device *dev) { return false; }

 static inline void pm_runtime_no_callbacks(struct device *dev) {}
 static inline void pm_runtime_irq_safe(struct device *dev) {}
 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }

 static inline bool pm_runtime_has_no_callbacks(struct device *dev) { return false; }
 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
 static inline void __pm_runtime_use_autosuspend(struct device *dev,
 						bool use) {}
 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
 						int delay) {}
 static inline u64 pm_runtime_autosuspend_expiration(
 				struct device *dev) { return 0; }
 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
 						bool enable){}
 static inline void pm_runtime_get_suppliers(struct device *dev) {}
 static inline void pm_runtime_put_suppliers(struct device *dev) {}
 static inline void pm_runtime_new_link(struct device *dev) {}
 static inline void pm_runtime_drop_link(struct device_link *link) {}
 static inline void pm_runtime_release_supplier(struct device_link *link) {}

 #endif /* !CONFIG_PM */

 /**
  * pm_runtime_idle - Conditionally set up autosuspend of a device or suspend it.
  * @dev: Target device.
  *
  * Invoke the "idle check" callback of @dev and, depending on its return value,
  * set up autosuspend of @dev or suspend it (depending on whether or not
  * autosuspend has been enabled for it).
  */
 static inline int pm_runtime_idle(struct device *dev)
 {
 	return __pm_runtime_idle(dev, 0);
 }

 /**
  * pm_runtime_suspend - Suspend a device synchronously.
  * @dev: Target device.
  */
 static inline int pm_runtime_suspend(struct device *dev)
 {
 	return __pm_runtime_suspend(dev, 0);
 }

 /**
  * pm_runtime_autosuspend - Set up autosuspend of a device or suspend it.
  * @dev: Target device.
  *
  * Set up autosuspend of @dev or suspend it (depending on whether or not
  * autosuspend is enabled for it) without engaging its "idle check" callback.
  */
 static inline int pm_runtime_autosuspend(struct device *dev)
 {
 	return __pm_runtime_suspend(dev, RPM_AUTO);
 }

 /**
  * pm_runtime_resume - Resume a device synchronously.
  * @dev: Target device.
  */
 static inline int pm_runtime_resume(struct device *dev)
 {
 	return __pm_runtime_resume(dev, 0);
 }

 /**
  * pm_request_idle - Queue up "idle check" execution for a device.
  * @dev: Target device.
  *
  * Queue up a work item to run an equivalent of pm_runtime_idle() for @dev
  * asynchronously.
  */
 static inline int pm_request_idle(struct device *dev)
 {
 	return __pm_runtime_idle(dev, RPM_ASYNC);
 }

 /**
  * pm_request_resume - Queue up runtime-resume of a device.
  * @dev: Target device.
  */
 static inline int pm_request_resume(struct device *dev)
 {
 	return __pm_runtime_resume(dev, RPM_ASYNC);
 }

 /**
  * pm_request_autosuspend - Queue up autosuspend of a device.
  * @dev: Target device.
  *
  * Queue up a work item to run an equivalent pm_runtime_autosuspend() for @dev
  * asynchronously.
  */
 static inline int pm_request_autosuspend(struct device *dev)
 {
 	return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
 }

 /**
  * pm_runtime_get - Bump up usage counter and queue up resume of a device.
  * @dev: Target device.
  *
  * Bump up the runtime PM usage counter of @dev and queue up a work item to
  * carry out runtime-resume of it.
  */
 static inline int pm_runtime_get(struct device *dev)
 {
 	return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
 }

 /**
  * pm_runtime_get_sync - Bump up usage counter of a device and resume it.
  * @dev: Target device.
  *
  * Bump up the runtime PM usage counter of @dev and carry out runtime-resume of
  * it synchronously.
  *
  * The possible return values of this function are the same as for
  * pm_runtime_resume() and the runtime PM usage counter of @dev remains
  * incremented in all cases, even if it returns an error code.
  * Consider using pm_runtime_resume_and_get() instead of it, especially
  * if its return value is checked by the caller, as this is likely to result
  * in cleaner code.
  */
 static inline int pm_runtime_get_sync(struct device *dev)
 {
 	return __pm_runtime_resume(dev, RPM_GET_PUT);
 }

 /**
  * pm_runtime_resume_and_get - Bump up usage counter of a device and resume it.
  * @dev: Target device.
  *
  * Resume @dev synchronously and if that is successful, increment its runtime
  * PM usage counter. Return 0 if the runtime PM usage counter of @dev has been
  * incremented or a negative error code otherwise.
  */
 static inline int pm_runtime_resume_and_get(struct device *dev)
 {
 	int ret;

 	ret = __pm_runtime_resume(dev, RPM_GET_PUT);
 	if (ret < 0) {
 		pm_runtime_put_noidle(dev);
 		return ret;
 	}

 	return 0;
 }

 /**
  * pm_runtime_put - Drop device usage counter and queue up "idle check" if 0.
  * @dev: Target device.
  *
  * Decrement the runtime PM usage counter of @dev and if it turns out to be
  * equal to 0, queue up a work item for @dev like in pm_request_idle().
  */
 static inline int pm_runtime_put(struct device *dev)
 {
 	return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
 }

 /**
  * __pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0.
  * @dev: Target device.
  *
  * Decrement the runtime PM usage counter of @dev and if it turns out to be
  * equal to 0, queue up a work item for @dev like in pm_request_autosuspend().
  */
 static inline int __pm_runtime_put_autosuspend(struct device *dev)
 {
 	return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
 }

 /**
  * pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0.
  * @dev: Target device.
  *
  * Decrement the runtime PM usage counter of @dev and if it turns out to be
  * equal to 0, queue up a work item for @dev like in pm_request_autosuspend().
  */
 static inline int pm_runtime_put_autosuspend(struct device *dev)
 {
 	return __pm_runtime_suspend(dev,
 	    RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
 }

 /**
  * pm_runtime_put_sync - Drop device usage counter and run "idle check" if 0.
  * @dev: Target device.
  *
  * Decrement the runtime PM usage counter of @dev and if it turns out to be
  * equal to 0, invoke the "idle check" callback of @dev and, depending on its
  * return value, set up autosuspend of @dev or suspend it (depending on whether
  * or not autosuspend has been enabled for it).
  *
  * The possible return values of this function are the same as for
  * pm_runtime_idle() and the runtime PM usage counter of @dev remains
  * decremented in all cases, even if it returns an error code.
  */
 static inline int pm_runtime_put_sync(struct device *dev)
 {
 	return __pm_runtime_idle(dev, RPM_GET_PUT);
 }

 /**
  * pm_runtime_put_sync_suspend - Drop device usage counter and suspend if 0.
  * @dev: Target device.
  *
  * Decrement the runtime PM usage counter of @dev and if it turns out to be
  * equal to 0, carry out runtime-suspend of @dev synchronously.
  *
  * The possible return values of this function are the same as for
  * pm_runtime_suspend() and the runtime PM usage counter of @dev remains
  * decremented in all cases, even if it returns an error code.
  */
 static inline int pm_runtime_put_sync_suspend(struct device *dev)
 {
 	return __pm_runtime_suspend(dev, RPM_GET_PUT);
 }

 /**
  * pm_runtime_put_sync_autosuspend - Drop device usage counter and autosuspend if 0.
  * @dev: Target device.
  *
  * Decrement the runtime PM usage counter of @dev and if it turns out to be
  * equal to 0, set up autosuspend of @dev or suspend it synchronously (depending
  * on whether or not autosuspend has been enabled for it).
  *
  * The possible return values of this function are the same as for
  * pm_runtime_autosuspend() and the runtime PM usage counter of @dev remains
  * decremented in all cases, even if it returns an error code.
  */
 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
 {
 	return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
 }

 /**
  * pm_runtime_set_active - Set runtime PM status to "active".
  * @dev: Target device.
  *
  * Set the runtime PM status of @dev to %RPM_ACTIVE and ensure that dependencies
  * of it will be taken into account.
  *
  * It is not valid to call this function for devices with runtime PM enabled.
  */
 static inline int pm_runtime_set_active(struct device *dev)
 {
 	return __pm_runtime_set_status(dev, RPM_ACTIVE);
 }

 /**
  * pm_runtime_set_suspended - Set runtime PM status to "suspended".
  * @dev: Target device.
  *
  * Set the runtime PM status of @dev to %RPM_SUSPENDED and ensure that
  * dependencies of it will be taken into account.
  *
  * It is not valid to call this function for devices with runtime PM enabled.
  */
 static inline int pm_runtime_set_suspended(struct device *dev)
 {
 	return __pm_runtime_set_status(dev, RPM_SUSPENDED);
 }

 /**
  * pm_runtime_disable - Disable runtime PM for a device.
  * @dev: Target device.
  *
  * Prevent the runtime PM framework from working with @dev (by incrementing its
  * "blocking" counter).
  *
  * For each invocation of this function for @dev there must be a matching
  * pm_runtime_enable() call in order for runtime PM to be enabled for it.
  */
 static inline void pm_runtime_disable(struct device *dev)
 {
 	__pm_runtime_disable(dev, true);
 }

 /**
  * pm_runtime_use_autosuspend - Allow autosuspend to be used for a device.
  * @dev: Target device.
  *
  * Allow the runtime PM autosuspend mechanism to be used for @dev whenever
  * requested (or "autosuspend" will be handled as direct runtime-suspend for
  * it).
  *
  * NOTE: It's important to undo this with pm_runtime_dont_use_autosuspend()
  * at driver exit time unless your driver initially enabled pm_runtime
  * with devm_pm_runtime_enable() (which handles it for you).
  */
 static inline void pm_runtime_use_autosuspend(struct device *dev)
 {
 	__pm_runtime_use_autosuspend(dev, true);
 }

 /**
  * pm_runtime_dont_use_autosuspend - Prevent autosuspend from being used.
  * @dev: Target device.
  *
  * Prevent the runtime PM autosuspend mechanism from being used for @dev which
  * means that "autosuspend" will be handled as direct runtime-suspend for it
  * going forward.
  */
 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
 {
 	__pm_runtime_use_autosuspend(dev, false);
 }

 #endif
	/* SPDX-License-Identifier: GPL-2.0-only */
	/*
	* pm_runtime.h - Device run-time power management helper functions.
	*
	* Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
	*/

	#ifndef _LINUX_PM_RUNTIME_H
	#define _LINUX_PM_RUNTIME_H

	#include <linux/device.h>
	#include <linux/notifier.h>
	#include <linux/pm.h>

	#include <linux/jiffies.h>

	/* Runtime PM flag argument bits */
	#define RPM_ASYNC 0x01 /* Request is asynchronous */
	#define RPM_NOWAIT 0x02 /* Don't wait for concurrent
	state change */
	#define RPM_GET_PUT 0x04 /* Increment/decrement the
	usage_count */
	#define RPM_AUTO 0x08 /* Use autosuspend_delay */

	/*
	* Use this for defining a set of PM operations to be used in all situations
	* (system suspend, hibernation or runtime PM).
	*
	* Note that the behaviour differs from the deprecated UNIVERSAL_DEV_PM_OPS()
	* macro, which uses the provided callbacks for both runtime PM and system
	* sleep, while DEFINE_RUNTIME_DEV_PM_OPS() uses pm_runtime_force_suspend()
	* and pm_runtime_force_resume() for its system sleep callbacks.
	*
	* If the underlying dev_pm_ops struct symbol has to be exported, use
	* EXPORT_RUNTIME_DEV_PM_OPS() or EXPORT_GPL_RUNTIME_DEV_PM_OPS() instead.
	*/
	#define DEFINE_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
	_DEFINE_DEV_PM_OPS(name, pm_runtime_force_suspend, \
	pm_runtime_force_resume, suspend_fn, \
	resume_fn, idle_fn)

	#define EXPORT_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
	EXPORT_DEV_PM_OPS(name) = { \
	RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
	}
	#define EXPORT_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
	EXPORT_GPL_DEV_PM_OPS(name) = { \
	RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
	}
	#define EXPORT_NS_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
	EXPORT_NS_DEV_PM_OPS(name, ns) = { \
	RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
	}
	#define EXPORT_NS_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
	EXPORT_NS_GPL_DEV_PM_OPS(name, ns) = { \
	RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
	}

	#ifdef CONFIG_PM
	extern struct workqueue_struct *pm_wq;

	static inline bool queue_pm_work(struct work_struct *work)
	{
	return queue_work(pm_wq, work);
	}

	extern int pm_generic_runtime_suspend(struct device *dev);
	extern int pm_generic_runtime_resume(struct device *dev);
	extern int pm_runtime_force_suspend(struct device *dev);
	extern int pm_runtime_force_resume(struct device *dev);

	extern int __pm_runtime_idle(struct device *dev, int rpmflags);
	extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
	extern int __pm_runtime_resume(struct device *dev, int rpmflags);
	extern int pm_runtime_get_if_active(struct device *dev);
	extern int pm_runtime_get_if_in_use(struct device *dev);
	extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
	extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
	extern int pm_runtime_barrier(struct device *dev);
	extern void pm_runtime_enable(struct device *dev);
	extern void __pm_runtime_disable(struct device *dev, bool check_resume);
	extern void pm_runtime_allow(struct device *dev);
	extern void pm_runtime_forbid(struct device *dev);
	extern void pm_runtime_no_callbacks(struct device *dev);
	extern void pm_runtime_irq_safe(struct device *dev);
	extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
	extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
	extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
	extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
	extern void pm_runtime_get_suppliers(struct device *dev);
	extern void pm_runtime_put_suppliers(struct device *dev);
	extern void pm_runtime_new_link(struct device *dev);
	extern void pm_runtime_drop_link(struct device_link *link);
	extern void pm_runtime_release_supplier(struct device_link *link);

	extern int devm_pm_runtime_enable(struct device *dev);

	/**
	* pm_suspend_ignore_children - Set runtime PM behavior regarding children.
	* @dev: Target device.
	* @enable: Whether or not to ignore possible dependencies on children.
	*
	* The dependencies of @dev on its children will not be taken into account by
	* the runtime PM framework going forward if @enable is %true, or they will
	* be taken into account otherwise.
	*/
	static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
	{
	dev->power.ignore_children = enable;
	}

	/**
	* pm_runtime_get_noresume - Bump up runtime PM usage counter of a device.
	* @dev: Target device.
	*/
	static inline void pm_runtime_get_noresume(struct device *dev)
	{
	atomic_inc(&dev->power.usage_count);
	}

	/**
	* pm_runtime_put_noidle - Drop runtime PM usage counter of a device.
	* @dev: Target device.
	*
	* Decrement the runtime PM usage counter of @dev unless it is 0 already.
	*/
	static inline void pm_runtime_put_noidle(struct device *dev)
	{
	atomic_add_unless(&dev->power.usage_count, -1, 0);
	}

	/**
	* pm_runtime_suspended - Check whether or not a device is runtime-suspended.
	* @dev: Target device.
	*
	* Return %true if runtime PM is enabled for @dev and its runtime PM status is
	* %RPM_SUSPENDED, or %false otherwise.
	*
	* Note that the return value of this function can only be trusted if it is
	* called under the runtime PM lock of @dev or under conditions in which
	* runtime PM cannot be either disabled or enabled for @dev and its runtime PM
	* status cannot change.
	*/
	static inline bool pm_runtime_suspended(struct device *dev)
	{
	return dev->power.runtime_status == RPM_SUSPENDED
	&& !dev->power.disable_depth;
	}

	/**
	* pm_runtime_active - Check whether or not a device is runtime-active.
	* @dev: Target device.
	*
	* Return %true if runtime PM is disabled for @dev or its runtime PM status is
	* %RPM_ACTIVE, or %false otherwise.
	*
	* Note that the return value of this function can only be trusted if it is
	* called under the runtime PM lock of @dev or under conditions in which
	* runtime PM cannot be either disabled or enabled for @dev and its runtime PM
	* status cannot change.
	*/
	static inline bool pm_runtime_active(struct device *dev)
	{
	return dev->power.runtime_status == RPM_ACTIVE
	\|\| dev->power.disable_depth;
	}

	/**
	* pm_runtime_status_suspended - Check if runtime PM status is "suspended".
	* @dev: Target device.
	*
	* Return %true if the runtime PM status of @dev is %RPM_SUSPENDED, or %false
	* otherwise, regardless of whether or not runtime PM has been enabled for @dev.
	*
	* Note that the return value of this function can only be trusted if it is
	* called under the runtime PM lock of @dev or under conditions in which the
	* runtime PM status of @dev cannot change.
	*/
	static inline bool pm_runtime_status_suspended(struct device *dev)
	{
	return dev->power.runtime_status == RPM_SUSPENDED;
	}

	/**
	* pm_runtime_enabled - Check if runtime PM is enabled.
	* @dev: Target device.
	*
	* Return %true if runtime PM is enabled for @dev or %false otherwise.
	*
	* Note that the return value of this function can only be trusted if it is
	* called under the runtime PM lock of @dev or under conditions in which
	* runtime PM cannot be either disabled or enabled for @dev.
	*/
	static inline bool pm_runtime_enabled(struct device *dev)
	{
	return !dev->power.disable_depth;
	}

	/**
	* pm_runtime_has_no_callbacks - Check if runtime PM callbacks may be present.
	* @dev: Target device.
	*
	* Return %true if @dev is a special device without runtime PM callbacks or
	* %false otherwise.
	*/
	static inline bool pm_runtime_has_no_callbacks(struct device *dev)
	{
	return dev->power.no_callbacks;
	}

	/**
	* pm_runtime_mark_last_busy - Update the last access time of a device.
	* @dev: Target device.
	*
	* Update the last access time of @dev used by the runtime PM autosuspend
	* mechanism to the current time as returned by ktime_get_mono_fast_ns().
	*/
	static inline void pm_runtime_mark_last_busy(struct device *dev)
	{
	WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
	}

	/**
	* pm_runtime_is_irq_safe - Check if runtime PM can work in interrupt context.
	* @dev: Target device.
	*
	* Return %true if @dev has been marked as an "IRQ-safe" device (with respect
	* to runtime PM), in which case its runtime PM callabcks can be expected to
	* work correctly when invoked from interrupt handlers.
	*/
	static inline bool pm_runtime_is_irq_safe(struct device *dev)
	{
	return dev->power.irq_safe;
	}

	extern u64 pm_runtime_suspended_time(struct device *dev);

	#else /* !CONFIG_PM */

	static inline bool queue_pm_work(struct work_struct *work) { return false; }

	static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
	static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
	static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
	static inline int pm_runtime_force_resume(struct device *dev) { return 0; }

	static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
	{
	return -ENOSYS;
	}
	static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
	{
	return -ENOSYS;
	}
	static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
	{
	return 1;
	}
	static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
	{
	return -ENOSYS;
	}
	static inline int pm_runtime_get_if_in_use(struct device *dev)
	{
	return -EINVAL;
	}
	static inline int pm_runtime_get_if_active(struct device *dev)
	{
	return -EINVAL;
	}
	static inline int __pm_runtime_set_status(struct device *dev,
	unsigned int status) { return 0; }
	static inline int pm_runtime_barrier(struct device *dev) { return 0; }
	static inline void pm_runtime_enable(struct device *dev) {}
	static inline void __pm_runtime_disable(struct device *dev, bool c) {}
	static inline void pm_runtime_allow(struct device *dev) {}
	static inline void pm_runtime_forbid(struct device *dev) {}

	static inline int devm_pm_runtime_enable(struct device *dev) { return 0; }

	static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
	static inline void pm_runtime_get_noresume(struct device *dev) {}
	static inline void pm_runtime_put_noidle(struct device *dev) {}
	static inline bool pm_runtime_suspended(struct device *dev) { return false; }
	static inline bool pm_runtime_active(struct device *dev) { return true; }
	static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
	static inline bool pm_runtime_enabled(struct device *dev) { return false; }

	static inline void pm_runtime_no_callbacks(struct device *dev) {}
	static inline void pm_runtime_irq_safe(struct device *dev) {}
	static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }

	static inline bool pm_runtime_has_no_callbacks(struct device *dev) { return false; }
	static inline void pm_runtime_mark_last_busy(struct device *dev) {}
	static inline void __pm_runtime_use_autosuspend(struct device *dev,
	bool use) {}
	static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
	int delay) {}
	static inline u64 pm_runtime_autosuspend_expiration(
	struct device *dev) { return 0; }
	static inline void pm_runtime_set_memalloc_noio(struct device *dev,
	bool enable){}
	static inline void pm_runtime_get_suppliers(struct device *dev) {}
	static inline void pm_runtime_put_suppliers(struct device *dev) {}
	static inline void pm_runtime_new_link(struct device *dev) {}
	static inline void pm_runtime_drop_link(struct device_link *link) {}
	static inline void pm_runtime_release_supplier(struct device_link *link) {}

	#endif /* !CONFIG_PM */

	/**
	* pm_runtime_idle - Conditionally set up autosuspend of a device or suspend it.
	* @dev: Target device.
	*
	* Invoke the "idle check" callback of @dev and, depending on its return value,
	* set up autosuspend of @dev or suspend it (depending on whether or not
	* autosuspend has been enabled for it).
	*/
	static inline int pm_runtime_idle(struct device *dev)
	{
	return __pm_runtime_idle(dev, 0);
	}

	/**
	* pm_runtime_suspend - Suspend a device synchronously.
	* @dev: Target device.
	*/
	static inline int pm_runtime_suspend(struct device *dev)
	{
	return __pm_runtime_suspend(dev, 0);
	}

	/**
	* pm_runtime_autosuspend - Set up autosuspend of a device or suspend it.
	* @dev: Target device.
	*
	* Set up autosuspend of @dev or suspend it (depending on whether or not
	* autosuspend is enabled for it) without engaging its "idle check" callback.
	*/
	static inline int pm_runtime_autosuspend(struct device *dev)
	{
	return __pm_runtime_suspend(dev, RPM_AUTO);
	}

	/**
	* pm_runtime_resume - Resume a device synchronously.
	* @dev: Target device.
	*/
	static inline int pm_runtime_resume(struct device *dev)
	{
	return __pm_runtime_resume(dev, 0);
	}

	/**
	* pm_request_idle - Queue up "idle check" execution for a device.
	* @dev: Target device.
	*
	* Queue up a work item to run an equivalent of pm_runtime_idle() for @dev
	* asynchronously.
	*/
	static inline int pm_request_idle(struct device *dev)
	{
	return __pm_runtime_idle(dev, RPM_ASYNC);
	}

	/**
	* pm_request_resume - Queue up runtime-resume of a device.
	* @dev: Target device.
	*/
	static inline int pm_request_resume(struct device *dev)
	{
	return __pm_runtime_resume(dev, RPM_ASYNC);
	}

	/**
	* pm_request_autosuspend - Queue up autosuspend of a device.
	* @dev: Target device.
	*
	* Queue up a work item to run an equivalent pm_runtime_autosuspend() for @dev
	* asynchronously.
	*/
	static inline int pm_request_autosuspend(struct device *dev)
	{
	return __pm_runtime_suspend(dev, RPM_ASYNC \| RPM_AUTO);
	}

	/**
	* pm_runtime_get - Bump up usage counter and queue up resume of a device.
	* @dev: Target device.
	*
	* Bump up the runtime PM usage counter of @dev and queue up a work item to
	* carry out runtime-resume of it.
	*/
	static inline int pm_runtime_get(struct device *dev)
	{
	return __pm_runtime_resume(dev, RPM_GET_PUT \| RPM_ASYNC);
	}

	/**
	* pm_runtime_get_sync - Bump up usage counter of a device and resume it.
	* @dev: Target device.
	*
	* Bump up the runtime PM usage counter of @dev and carry out runtime-resume of
	* it synchronously.
	*
	* The possible return values of this function are the same as for
	* pm_runtime_resume() and the runtime PM usage counter of @dev remains
	* incremented in all cases, even if it returns an error code.
	* Consider using pm_runtime_resume_and_get() instead of it, especially
	* if its return value is checked by the caller, as this is likely to result
	* in cleaner code.
	*/
	static inline int pm_runtime_get_sync(struct device *dev)
	{
	return __pm_runtime_resume(dev, RPM_GET_PUT);
	}

	/**
	* pm_runtime_resume_and_get - Bump up usage counter of a device and resume it.
	* @dev: Target device.
	*
	* Resume @dev synchronously and if that is successful, increment its runtime
	* PM usage counter. Return 0 if the runtime PM usage counter of @dev has been
	* incremented or a negative error code otherwise.
	*/
	static inline int pm_runtime_resume_and_get(struct device *dev)
	{
	int ret;

	ret = __pm_runtime_resume(dev, RPM_GET_PUT);
	if (ret < 0) {
	pm_runtime_put_noidle(dev);
	return ret;
	}

	return 0;
	}

	/**
	* pm_runtime_put - Drop device usage counter and queue up "idle check" if 0.
	* @dev: Target device.
	*
	* Decrement the runtime PM usage counter of @dev and if it turns out to be
	* equal to 0, queue up a work item for @dev like in pm_request_idle().
	*/
	static inline int pm_runtime_put(struct device *dev)
	{
	return __pm_runtime_idle(dev, RPM_GET_PUT \| RPM_ASYNC);
	}

	/**
	* __pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0.
	* @dev: Target device.
	*
	* Decrement the runtime PM usage counter of @dev and if it turns out to be
	* equal to 0, queue up a work item for @dev like in pm_request_autosuspend().
	*/
	static inline int __pm_runtime_put_autosuspend(struct device *dev)
	{
	return __pm_runtime_suspend(dev, RPM_GET_PUT \| RPM_ASYNC \| RPM_AUTO);
	}

	/**
	* pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0.
	* @dev: Target device.
	*
	* Decrement the runtime PM usage counter of @dev and if it turns out to be
	* equal to 0, queue up a work item for @dev like in pm_request_autosuspend().
	*/
	static inline int pm_runtime_put_autosuspend(struct device *dev)
	{
	return __pm_runtime_suspend(dev,
	RPM_GET_PUT \| RPM_ASYNC \| RPM_AUTO);
	}

	/**
	* pm_runtime_put_sync - Drop device usage counter and run "idle check" if 0.
	* @dev: Target device.
	*
	* Decrement the runtime PM usage counter of @dev and if it turns out to be
	* equal to 0, invoke the "idle check" callback of @dev and, depending on its
	* return value, set up autosuspend of @dev or suspend it (depending on whether
	* or not autosuspend has been enabled for it).
	*
	* The possible return values of this function are the same as for
	* pm_runtime_idle() and the runtime PM usage counter of @dev remains
	* decremented in all cases, even if it returns an error code.
	*/
	static inline int pm_runtime_put_sync(struct device *dev)
	{
	return __pm_runtime_idle(dev, RPM_GET_PUT);
	}

	/**
	* pm_runtime_put_sync_suspend - Drop device usage counter and suspend if 0.
	* @dev: Target device.
	*
	* Decrement the runtime PM usage counter of @dev and if it turns out to be
	* equal to 0, carry out runtime-suspend of @dev synchronously.
	*
	* The possible return values of this function are the same as for
	* pm_runtime_suspend() and the runtime PM usage counter of @dev remains
	* decremented in all cases, even if it returns an error code.
	*/
	static inline int pm_runtime_put_sync_suspend(struct device *dev)
	{
	return __pm_runtime_suspend(dev, RPM_GET_PUT);
	}

	/**
	* pm_runtime_put_sync_autosuspend - Drop device usage counter and autosuspend if 0.
	* @dev: Target device.
	*
	* Decrement the runtime PM usage counter of @dev and if it turns out to be
	* equal to 0, set up autosuspend of @dev or suspend it synchronously (depending
	* on whether or not autosuspend has been enabled for it).
	*
	* The possible return values of this function are the same as for
	* pm_runtime_autosuspend() and the runtime PM usage counter of @dev remains
	* decremented in all cases, even if it returns an error code.
	*/
	static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
	{
	return __pm_runtime_suspend(dev, RPM_GET_PUT \| RPM_AUTO);
	}

	/**
	* pm_runtime_set_active - Set runtime PM status to "active".
	* @dev: Target device.
	*
	* Set the runtime PM status of @dev to %RPM_ACTIVE and ensure that dependencies
	* of it will be taken into account.
	*
	* It is not valid to call this function for devices with runtime PM enabled.
	*/
	static inline int pm_runtime_set_active(struct device *dev)
	{
	return __pm_runtime_set_status(dev, RPM_ACTIVE);
	}

	/**
	* pm_runtime_set_suspended - Set runtime PM status to "suspended".
	* @dev: Target device.
	*
	* Set the runtime PM status of @dev to %RPM_SUSPENDED and ensure that
	* dependencies of it will be taken into account.
	*
	* It is not valid to call this function for devices with runtime PM enabled.
	*/
	static inline int pm_runtime_set_suspended(struct device *dev)
	{
	return __pm_runtime_set_status(dev, RPM_SUSPENDED);
	}

	/**
	* pm_runtime_disable - Disable runtime PM for a device.
	* @dev: Target device.
	*
	* Prevent the runtime PM framework from working with @dev (by incrementing its
	* "blocking" counter).
	*
	* For each invocation of this function for @dev there must be a matching
	* pm_runtime_enable() call in order for runtime PM to be enabled for it.
	*/
	static inline void pm_runtime_disable(struct device *dev)
	{
	__pm_runtime_disable(dev, true);
	}

	/**
	* pm_runtime_use_autosuspend - Allow autosuspend to be used for a device.
	* @dev: Target device.
	*
	* Allow the runtime PM autosuspend mechanism to be used for @dev whenever
	* requested (or "autosuspend" will be handled as direct runtime-suspend for
	* it).
	*
	* NOTE: It's important to undo this with pm_runtime_dont_use_autosuspend()
	* at driver exit time unless your driver initially enabled pm_runtime
	* with devm_pm_runtime_enable() (which handles it for you).
	*/
	static inline void pm_runtime_use_autosuspend(struct device *dev)
	{
	__pm_runtime_use_autosuspend(dev, true);
	}

	/**
	* pm_runtime_dont_use_autosuspend - Prevent autosuspend from being used.
	* @dev: Target device.
	*
	* Prevent the runtime PM autosuspend mechanism from being used for @dev which
	* means that "autosuspend" will be handled as direct runtime-suspend for it
	* going forward.
	*/
	static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
	{
	__pm_runtime_use_autosuspend(dev, false);
	}

	#endif