1/*
2 * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
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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 unsigned long version;
58 IOPMPowerFlags capabilityFlags;
59 IOPMPowerFlags outputPowerCharacter;
60 IOPMPowerFlags inputPowerRequirement;
61 unsigned long staticPower;
62 unsigned long stateOrder;
63 unsigned long powerToAttain;
64 unsigned long timeToAttain;
65 unsigned long settleUpTime;
66 unsigned long timeToLower;
67 unsigned long settleDownTime;
68 unsigned long powerDomainBudget;
69};
70
71typedef struct IOPMPowerState IOPMPowerState;
72
73enum {
74 kIOPMPowerStateVersion1 = 1,
75 kIOPMPowerStateVersion2 = 2
76};
77
78#endif /* _IOKIT_IOPMPOWERSTATE_H */
79