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+
+#ifndef _IOKIT_IOPMPOWERSTATE_H
+#define _IOKIT_IOPMPOWERSTATE_H
+
#include <IOKit/pwr_mgt/IOPM.h>
-struct IOPMPowerState
-{
- unsigned long version; // version number of this struct
-IOPMPowerFlags capabilityFlags; // bits that describe (to interested drivers) the capability of the device in this state
-IOPMPowerFlags outputPowerCharacter; // description (to power domain children) of the power provided in this state
-IOPMPowerFlags inputPowerRequirement; // description (to power domain parent) of input power required in this state
-unsigned long staticPower; // average consumption in milliwatts
-unsigned long unbudgetedPower; // additional consumption from separate power supply (mw)
-unsigned long powerToAttain; // additional power to attain this state from next lower state (in mw)
-unsigned long timeToAttain; // time required to enter this state from next lower state (in microseconds)
-unsigned long settleUpTime; // settle time required after entering this state from next lower state (microseconds)
-unsigned long timeToLower; // time required to enter next lower state from this one (in microseconds)
-unsigned long settleDownTime; // settle time required after entering next lower state from this state (microseconds)
-unsigned long powerDomainBudget; // power in mw a domain in this state can deliver to its children
+/*! @header IOPMpowerState.h
+ * @abstract Defines the struct IOPMPowerState that power managed drivers should use to describe their power states.
+ */
+
+/*! @struct IOPMPowerState
+ * @abstract Describes a device's power state.
+ * @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.
+ * @field version Defines version number of this struct. Just use the value "1" when defining an IOPMPowerState.
+ * @field capabilityFlags Describes the capability of the device in this state.
+ * @field outputPowerCharacter Describes the power provided in this state.
+ * @field inputPowerRequirement Describes the input power required in this state.
+ * @field staticPower Describes average consumption in milliwatts. Unused; drivers may specify 0.
+ * @field stateOrder Valid in version kIOPMPowerStateVersion2 or greater of this structure. Defines ordering of power states independently of the power state ordinal.
+ * @field powerToAttain Describes dditional power to attain this state from next lower state (in milliWatts). Unused; drivers may specify 0.
+ * @field timeToAttain Describes time required to enter this state from next lower state (in microseconds). Unused; drivers may specify 0.
+ * @field settleUpTime Describes settle time required after entering this state from next lower state (microseconds). Unused; drivers may specify 0.
+ * @field timeToLower Describes time required to enter next lower state from this one (microseconds). Unused; drivers may specify 0.
+ * @field settleDownTime Settle time required after entering next lower state from this state (microseconds). Unused; drivers may specify 0.
+ * @field powerDomainBudget Describes power in milliWatts a domain in this state can deliver to its children. Unused; drivers may specify 0.
+ * }
+ */
+
+struct IOPMPowerState {
+ unsigned long version;
+ IOPMPowerFlags capabilityFlags;
+ IOPMPowerFlags outputPowerCharacter;
+ IOPMPowerFlags inputPowerRequirement;
+ unsigned long staticPower;
+ unsigned long stateOrder;
+ unsigned long powerToAttain;
+ unsigned long timeToAttain;
+ unsigned long settleUpTime;
+ unsigned long timeToLower;
+ unsigned long settleDownTime;
+ unsigned long powerDomainBudget;
};
typedef struct IOPMPowerState IOPMPowerState;
enum {
- kIOPMPowerStateVersion1 = 1
+ kIOPMPowerStateVersion1 = 1,
+ kIOPMPowerStateVersion2 = 2
};
+
+#endif /* _IOKIT_IOPMPOWERSTATE_H */
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