1/*
2 * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
3 *
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27 */
28
29#ifndef _IOKIT_IOPMPOWERSTATE_H
30#define _IOKIT_IOPMPOWERSTATE_H
31
32#include <IOKit/pwr_mgt/IOPM.h>
33
34/*! @header IOPMpowerState.h
35 @abstract Defines the struct IOPMPowerState that power managed drivers should use to describe their power states.
36*/
37
38/*! @struct IOPMPowerState
39 @abstract Describes a device's power state.
40 @discussion To take part in system power management, drivers should define an array of 2 or more power states and pass it to kernel power management through IOService::registerPowerDriver.
41 @field version Defines version number of this struct. Just use the value "1" when defining an IOPMPowerState.
42 @field capabilityFlags Describes the capability of the device in this state.
43 @field outputPowerCharacter Describes the power provided in this state.
44 @field inputPowerRequirement Describes the input power required in this state.
45 @field staticPower Describes average consumption in milliwatts. Unused; drivers may specify 0.
46 @field stateOrder Valid in version kIOPMPowerStateVersion2 or greater of this structure. Defines ordering of power states independently of the power state ordinal.
47 @field powerToAttain Describes dditional power to attain this state from next lower state (in milliWatts). Unused; drivers may specify 0.
48 @field timeToAttain Describes time required to enter this state from next lower state (in microseconds). Unused; drivers may specify 0.
49 @field settleUpTime Describes settle time required after entering this state from next lower state (microseconds). Unused; drivers may specify 0.
50 @field timeToLower Describes time required to enter next lower state from this one (microseconds). Unused; drivers may specify 0.
51 @field settleDownTime Settle time required after entering next lower state from this state (microseconds). Unused; drivers may specify 0.
52 @field powerDomainBudget Describes power in milliWatts a domain in this state can deliver to its children. Unused; drivers may specify 0.
53}
54*/
55
56struct IOPMPowerState
57{
58 unsigned long version;
59 IOPMPowerFlags capabilityFlags;
60 IOPMPowerFlags outputPowerCharacter;
61 IOPMPowerFlags inputPowerRequirement;
62 unsigned long staticPower;
63 unsigned long stateOrder;
64 unsigned long powerToAttain;
65 unsigned long timeToAttain;
66 unsigned long settleUpTime;
67 unsigned long timeToLower;
68 unsigned long settleDownTime;
69 unsigned long powerDomainBudget;
70};
71
72typedef struct IOPMPowerState IOPMPowerState;
73
74enum {
75 kIOPMPowerStateVersion1 = 1,
76 kIOPMPowerStateVersion2 = 2
77};
78
79#endif /* _IOKIT_IOPMPOWERSTATE_H */
80