[deliverable/linux.git] / include / linux / pm_runtime.h

/*
 * pm_runtime.h - Device run-time power management helper functions.
 *
 * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
 *
 * This file is released under the GPLv2.
 */

#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 */

#ifdef CONFIG_PM_RUNTIME

extern struct workqueue_struct *pm_wq;

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_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 int pm_generic_runtime_idle(struct device *dev);
extern int pm_generic_runtime_suspend(struct device *dev);
extern int pm_generic_runtime_resume(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 unsigned long pm_runtime_autosuspend_expiration(struct device *dev);

static inline bool pm_children_suspended(struct device *dev)
{
	return dev->power.ignore_children
		|| !atomic_read(&dev->power.child_count);
}

static inline void pm_runtime_get_noresume(struct device *dev)
{
	atomic_inc(&dev->power.usage_count);
}

static inline void pm_runtime_put_noidle(struct device *dev)
{
	atomic_add_unless(&dev->power.usage_count, -1, 0);
}

static inline bool device_run_wake(struct device *dev)
{
	return dev->power.run_wake;
}

static inline void device_set_run_wake(struct device *dev, bool enable)
{
	dev->power.run_wake = enable;
}

static inline bool pm_runtime_suspended(struct device *dev)
{
	return dev->power.runtime_status == RPM_SUSPENDED
		&& !dev->power.disable_depth;
}

static inline bool pm_runtime_status_suspended(struct device *dev)
{
	return dev->power.runtime_status == RPM_SUSPENDED;
}

static inline bool pm_runtime_enabled(struct device *dev)
{
	return !dev->power.disable_depth;
}

static inline bool pm_runtime_callbacks_present(struct device *dev)
{
	return !dev->power.no_callbacks;
}

static inline void pm_runtime_mark_last_busy(struct device *dev)
{
	ACCESS_ONCE(dev->power.last_busy) = jiffies;
}

#else /* !CONFIG_PM_RUNTIME */

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_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 bool pm_children_suspended(struct device *dev) { return false; }
static inline void pm_runtime_get_noresume(struct device *dev) {}
static inline void pm_runtime_put_noidle(struct device *dev) {}
static inline bool device_run_wake(struct device *dev) { return false; }
static inline void device_set_run_wake(struct device *dev, bool enable) {}
static inline bool pm_runtime_suspended(struct device *dev) { return false; }
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 int pm_generic_runtime_idle(struct device *dev) { return 0; }
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 void pm_runtime_no_callbacks(struct device *dev) {}
static inline void pm_runtime_irq_safe(struct device *dev) {}

static inline bool pm_runtime_callbacks_present(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 unsigned long pm_runtime_autosuspend_expiration(
				struct device *dev) { return 0; }

#endif /* !CONFIG_PM_RUNTIME */

static inline int pm_runtime_idle(struct device *dev)
{
	return __pm_runtime_idle(dev, 0);
}

static inline int pm_runtime_suspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, 0);
}

static inline int pm_runtime_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_AUTO);
}

static inline int pm_runtime_resume(struct device *dev)
{
	return __pm_runtime_resume(dev, 0);
}

static inline int pm_request_idle(struct device *dev)
{
	return __pm_runtime_idle(dev, RPM_ASYNC);
}

static inline int pm_request_resume(struct device *dev)
{
	return __pm_runtime_resume(dev, RPM_ASYNC);
}

static inline int pm_request_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
}

static inline int pm_runtime_get(struct device *dev)
{
	return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
}

static inline int pm_runtime_get_sync(struct device *dev)
{
	return __pm_runtime_resume(dev, RPM_GET_PUT);
}

static inline int pm_runtime_put(struct device *dev)
{
	return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
}

static inline int pm_runtime_put_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev,
	    RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
}

static inline int pm_runtime_put_sync(struct device *dev)
{
	return __pm_runtime_idle(dev, RPM_GET_PUT);
}

static inline int pm_runtime_put_sync_suspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_GET_PUT);
}

static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
{
	return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
}

static inline int pm_runtime_set_active(struct device *dev)
{
	return __pm_runtime_set_status(dev, RPM_ACTIVE);
}

static inline void pm_runtime_set_suspended(struct device *dev)
{
	__pm_runtime_set_status(dev, RPM_SUSPENDED);
}

static inline void pm_runtime_disable(struct device *dev)
{
	__pm_runtime_disable(dev, true);
}

static inline void pm_runtime_use_autosuspend(struct device *dev)
{
	__pm_runtime_use_autosuspend(dev, true);
}

static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
{
	__pm_runtime_use_autosuspend(dev, false);
}

#endif
Commit	Line	Data
5e928f77 RW	1	/*
	2	* pm_runtime.h - Device run-time power management helper functions.
	3	*
	4	* Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
	5	*
	6	* This file is released under the GPLv2.
	7	*/
	8
	9	#ifndef _LINUX_PM_RUNTIME_H
	10	#define _LINUX_PM_RUNTIME_H
	11
	12	#include <linux/device.h>
246359d3	13	#include <linux/notifier.h>
5e928f77 RW	14	#include <linux/pm.h>
5e928f77 RW	15
15bcb91d AS	16	#include <linux/jiffies.h>
15bcb91d AS	17
3f9af051 AS	18	/* Runtime PM flag argument bits */
	19	#define RPM_ASYNC 0x01 /* Request is asynchronous */
	20	#define RPM_NOWAIT 0x02 /* Don't wait for concurrent
	21	state change */
140a6c94 AS	22	#define RPM_GET_PUT 0x04 /* Increment/decrement the
140a6c94 AS	23	usage_count */
15bcb91d	24	#define RPM_AUTO 0x08 /* Use autosuspend_delay */
3f9af051	25
5e928f77 RW	26	#ifdef CONFIG_PM_RUNTIME
	27
	28	extern struct workqueue_struct *pm_wq;
	29
140a6c94 AS	30	extern int __pm_runtime_idle(struct device *dev, int rpmflags);
	31	extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
	32	extern int __pm_runtime_resume(struct device *dev, int rpmflags);
5e928f77	33	extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
5e928f77 RW	34	extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
	35	extern int pm_runtime_barrier(struct device *dev);
	36	extern void pm_runtime_enable(struct device *dev);
	37	extern void __pm_runtime_disable(struct device *dev, bool check_resume);
53823639 RW	38	extern void pm_runtime_allow(struct device *dev);
53823639 RW	39	extern void pm_runtime_forbid(struct device *dev);
2f60ba70 RW	40	extern int pm_generic_runtime_idle(struct device *dev);
	41	extern int pm_generic_runtime_suspend(struct device *dev);
	42	extern int pm_generic_runtime_resume(struct device *dev);
7490e442	43	extern void pm_runtime_no_callbacks(struct device *dev);
c7b61de5	44	extern void pm_runtime_irq_safe(struct device *dev);
15bcb91d AS	45	extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
	46	extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
	47	extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
5e928f77 RW	48
	49	static inline bool pm_children_suspended(struct device *dev)
	50	{
	51	return dev->power.ignore_children
	52	\|\| !atomic_read(&dev->power.child_count);
	53	}
	54
5e928f77 RW	55	static inline void pm_runtime_get_noresume(struct device *dev)
	56	{
	57	atomic_inc(&dev->power.usage_count);
	58	}
	59
	60	static inline void pm_runtime_put_noidle(struct device *dev)
	61	{
	62	atomic_add_unless(&dev->power.usage_count, -1, 0);
	63	}
	64
7a1a8eb5 RW	65	static inline bool device_run_wake(struct device *dev)
	66	{
	67	return dev->power.run_wake;
	68	}
	69
	70	static inline void device_set_run_wake(struct device *dev, bool enable)
	71	{
	72	dev->power.run_wake = enable;
	73	}
	74
d690b2cd RW	75	static inline bool pm_runtime_suspended(struct device *dev)
d690b2cd RW	76	{
f08f5a0a RW	77	return dev->power.runtime_status == RPM_SUSPENDED
f08f5a0a RW	78	&& !dev->power.disable_depth;
d690b2cd RW	79	}
d690b2cd RW	80
f3393b62 KH	81	static inline bool pm_runtime_status_suspended(struct device *dev)
	82	{
	83	return dev->power.runtime_status == RPM_SUSPENDED;
	84	}
	85
4b31db8a RW	86	static inline bool pm_runtime_enabled(struct device *dev)
	87	{
	88	return !dev->power.disable_depth;
	89	}
	90
cb8f51bd RW	91	static inline bool pm_runtime_callbacks_present(struct device *dev)
	92	{
	93	return !dev->power.no_callbacks;
	94	}
	95
15bcb91d AS	96	static inline void pm_runtime_mark_last_busy(struct device *dev)
	97	{
	98	ACCESS_ONCE(dev->power.last_busy) = jiffies;
	99	}
	100
5e928f77 RW	101	#else /* !CONFIG_PM_RUNTIME */
5e928f77 RW	102
140a6c94 AS	103	static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
	104	{
	105	return -ENOSYS;
	106	}
	107	static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
	108	{
	109	return -ENOSYS;
	110	}
	111	static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
	112	{
	113	return 1;
	114	}
5e928f77 RW	115	static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
	116	{
	117	return -ENOSYS;
	118	}
5e928f77 RW	119	static inline int __pm_runtime_set_status(struct device *dev,
	120	unsigned int status) { return 0; }
	121	static inline int pm_runtime_barrier(struct device *dev) { return 0; }
	122	static inline void pm_runtime_enable(struct device *dev) {}
	123	static inline void __pm_runtime_disable(struct device *dev, bool c) {}
53823639 RW	124	static inline void pm_runtime_allow(struct device *dev) {}
53823639 RW	125	static inline void pm_runtime_forbid(struct device *dev) {}
5e928f77 RW	126
5e928f77 RW	127	static inline bool pm_children_suspended(struct device *dev) { return false; }
5e928f77 RW	128	static inline void pm_runtime_get_noresume(struct device *dev) {}
5e928f77 RW	129	static inline void pm_runtime_put_noidle(struct device *dev) {}
7a1a8eb5 RW	130	static inline bool device_run_wake(struct device *dev) { return false; }
7a1a8eb5 RW	131	static inline void device_set_run_wake(struct device *dev, bool enable) {}
d690b2cd	132	static inline bool pm_runtime_suspended(struct device *dev) { return false; }
f3393b62	133	static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
4b31db8a	134	static inline bool pm_runtime_enabled(struct device *dev) { return false; }
5e928f77	135
2f60ba70 RW	136	static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
	137	static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
	138	static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
7490e442	139	static inline void pm_runtime_no_callbacks(struct device *dev) {}
c7b61de5	140	static inline void pm_runtime_irq_safe(struct device *dev) {}
2f60ba70	141
cb8f51bd	142	static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
15bcb91d AS	143	static inline void pm_runtime_mark_last_busy(struct device *dev) {}
	144	static inline void __pm_runtime_use_autosuspend(struct device *dev,
	145	bool use) {}
	146	static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
	147	int delay) {}
	148	static inline unsigned long pm_runtime_autosuspend_expiration(
	149	struct device *dev) { return 0; }
	150
5e928f77 RW	151	#endif /* !CONFIG_PM_RUNTIME */
5e928f77 RW	152
140a6c94 AS	153	static inline int pm_runtime_idle(struct device *dev)
	154	{
	155	return __pm_runtime_idle(dev, 0);
	156	}
	157
	158	static inline int pm_runtime_suspend(struct device *dev)
	159	{
	160	return __pm_runtime_suspend(dev, 0);
	161	}
	162
15bcb91d AS	163	static inline int pm_runtime_autosuspend(struct device *dev)
	164	{
	165	return __pm_runtime_suspend(dev, RPM_AUTO);
	166	}
	167
140a6c94 AS	168	static inline int pm_runtime_resume(struct device *dev)
	169	{
	170	return __pm_runtime_resume(dev, 0);
	171	}
	172
	173	static inline int pm_request_idle(struct device *dev)
	174	{
	175	return __pm_runtime_idle(dev, RPM_ASYNC);
	176	}
	177
	178	static inline int pm_request_resume(struct device *dev)
	179	{
	180	return __pm_runtime_resume(dev, RPM_ASYNC);
	181	}
	182
5fc62aad ML	183	static inline int pm_request_autosuspend(struct device *dev)
	184	{
	185	return __pm_runtime_suspend(dev, RPM_ASYNC \| RPM_AUTO);
	186	}
	187
5e928f77 RW	188	static inline int pm_runtime_get(struct device *dev)
5e928f77 RW	189	{
140a6c94	190	return __pm_runtime_resume(dev, RPM_GET_PUT \| RPM_ASYNC);
5e928f77 RW	191	}
	192
	193	static inline int pm_runtime_get_sync(struct device *dev)
	194	{
140a6c94	195	return __pm_runtime_resume(dev, RPM_GET_PUT);
5e928f77 RW	196	}
	197
	198	static inline int pm_runtime_put(struct device *dev)
	199	{
140a6c94	200	return __pm_runtime_idle(dev, RPM_GET_PUT \| RPM_ASYNC);
5e928f77 RW	201	}
5e928f77 RW	202
15bcb91d AS	203	static inline int pm_runtime_put_autosuspend(struct device *dev)
	204	{
	205	return __pm_runtime_suspend(dev,
	206	RPM_GET_PUT \| RPM_ASYNC \| RPM_AUTO);
	207	}
	208
5e928f77 RW	209	static inline int pm_runtime_put_sync(struct device *dev)
5e928f77 RW	210	{
140a6c94	211	return __pm_runtime_idle(dev, RPM_GET_PUT);
5e928f77 RW	212	}
5e928f77 RW	213
c7b61de5 AS	214	static inline int pm_runtime_put_sync_suspend(struct device *dev)
	215	{
	216	return __pm_runtime_suspend(dev, RPM_GET_PUT);
	217	}
	218
15bcb91d AS	219	static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
	220	{
	221	return __pm_runtime_suspend(dev, RPM_GET_PUT \| RPM_AUTO);
	222	}
	223
5e928f77 RW	224	static inline int pm_runtime_set_active(struct device *dev)
	225	{
	226	return __pm_runtime_set_status(dev, RPM_ACTIVE);
	227	}
	228
	229	static inline void pm_runtime_set_suspended(struct device *dev)
	230	{
	231	__pm_runtime_set_status(dev, RPM_SUSPENDED);
	232	}
	233
	234	static inline void pm_runtime_disable(struct device *dev)
	235	{
	236	__pm_runtime_disable(dev, true);
	237	}
	238
15bcb91d AS	239	static inline void pm_runtime_use_autosuspend(struct device *dev)
	240	{
	241	__pm_runtime_use_autosuspend(dev, true);
	242	}
	243
	244	static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
	245	{
	246	__pm_runtime_use_autosuspend(dev, false);
	247	}
	248
5e928f77	249	#endif