Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Compatibility Note: The _PSW method is deprecated in ACPI 3.0. The _DSW method should be
used instead. OSPM will only use the _PSW method if OSPM does not support _DSW or if the
_DSW method is not present.
Arguments: (3)
Arg0 – An Integer that contains the device wake capability control
0 – Disable the device’s wake capabilities
1 – Enable the device’s wake capabilities
Arg1 – An Integer that contains the target system state (0-4)
Arg2 – An Integer that contains the target device state
0 – The device will remain in state D0
1 – The device will be placed in either state D0 or D1
2 – The device will be placed in either state D0, D1, or D2
3 – The device will be placed in either state D0, D1, D2, or D3
Return Value:
None
7.3.2 _PS0 (Power State 0)
This Control Method is used to put the specific device into its D0 state. This Control Method can
only access Operation Regions that are either always available while in a system working state or
that are available when the Power Resources references by the _PR0 object are all ON.
Arguments:
None
Return Value:
None
7.3.3 _PS1 (Power State 1)
This control method is used to put the specific device into its D1 state. This control method can only
access Operation Regions that are either always available while in the system working state (S0) or
that are available when the Power Resources referenced by the _PR0 object are all ON.
Arguments:
None
Return Value:
None
7.3.4 _PS2 (Power State 2)
This control method is used to put the specific device into its D2 state. This control method can only
access Operation Regions that are either always available while in the system working state (S0) or
that are available when the Power Resources referenced by the _PR0 and _PR1 objects are all ON.
396 April, 2015 Version 6.0