Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Example:
// Fan Control is defined as follows:
// Speed 1 (Fan is Off): Acoustic Limit 1, Power Limit 1, = 95C
// _SCP Notifies the platform the current cooling mode.
// Arg0 = Mode
// 0 - Active cooling
// 1 - Passive cooling
// Arg1 = Acoustic Limit
// 1 = No acoustic tolerance
// ...
// 5 = maximum acoustic tolerance
// Arg2 = Power Limit
// 1 = No power may be used to cool
// ...
// 5 = maximum power may be used to cool
Method(_SCP,3,Serialized)
{
// Store the Cooling Mode in NVS and use as needed in
// the rest of the ASL Code.
Store(Arg0, CTYP)
// Set PSVT to account for a Legacy OS that does not pass
// in either the acoustic limit or Power Limit.
If(Arg0)
{
Store(60,PSVT)
}
Else
{
Store(97,PSVT)
}
If (CondRefOf (_OSI,Local0))
{
If (\_OSI ("3.0 _SCP Extensions"))
{
// Determine Power Limit.
//
// NOTE1: PSVT = Passive Cooling Trip Point stored
// in NVS in Celsius.
//
// NOTE2: 4 Active Cooling Trips Points correspond to 5
// unique Power Limit regions and 5 unique acoustic limit
// regions.
616 April, 2015 Version 6.0