Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
may not be possible. Instead the firmware can choose to expose a virtual power supply that
represents one or more of the physical power supplies.
Table 10-278 Power Source Objects
Object
_PSR
_PCL
_PIF
_PRL
Description
Returns whether this power source device is currently online.
List of pointers to devices this power source is powering.
Returns static information about a power source.
List of pointers to all the other power source devices that belong in the same redundancy group
of which the power supply device is a member.
10.3.1 _PSR (Power Source)
Returns whether the power source device is currently in use. This can be used to determine if system
is running off this power supply or adapter. On mobile systes this will report that the system is not
running on the AC adapter if any of the batteries in the system is being forced to discharge. In
systems that contains multiple power sources, this object reports the power source’s online or offline
status.
Arguments:
None
Return Value:
An Integer containing the power source status
0 – Off-line (not on AC power)
1 – On-line
10.3.2 _PCL (Power Consumer List)
This object evaluates to a list of pointers, each pointing to a device or a bus powered by the power
source device. Pointing to a bus indicates that all devices under the bus are powered by the power
source device.
Arguments:
None
Return Value:
A variable-length Package containing a list of References to devices or buses
10.3.3 _PIF (Power Source Information)
This object returns information about the Power Source, which remains constant until the Power
Source is changed. When the power source changes, the platform issues a Notify(0x0) (Bus Check)
to the Power Source device to indicate that OSPM must re-evaluate the _PIF object.
Arguments:
None
584 April, 2015 Version 6.0