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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
// Thermal Zone
External (\PPKG, MethodObj)
#define HAVE_THERMALZONE
Scope (\_TZ)
{
ThermalZone (THRM)
{
Name (_TC1, 0x02)
Name (_TC2, 0x03)
// Thermal zone polling frequency: 10 seconds
Name (_TZP, 100)
// Thermal sampling period for passive cooling: 10 seconds
Name (_TSP, 100)
// Convert from Degrees C to 1/10 Kelvin for ACPI
Method (CTOK, 1)
{
// 10th of Degrees C
Multiply (Arg0, 10, Local0)
// Convert to Kelvin
Add (Local0, 2732, Local0)
Return (Local0)
}
// Threshold for OS to shutdown
Method (_CRT, 0, Serialized)
{
Return (CTOK (\TCRT))
}
// Threshold for passive cooling
Method (_PSV, 0, Serialized)
{
Return (CTOK (\TPSV))
}
// Processors used for passive cooling
Method (_PSL, 0, Serialized)
{
Return (\PPKG ())
}
Method (_TMP, 0, Serialized)
{
// Returns Higher of the two readings for CPU & VGA Temperature
If (LGreater (\_SB.PCI0.LPCB.EC0.TMP2, \_SB.PCI0.LPCB.EC0.TMP1))
{
// CPU high temperature
Store (\_SB.PCI0.LPCB.EC0.TMP2, Local0)
}
Else
{
// VGA high temperature
Store (\_SB.PCI0.LPCB.EC0.TMP1, Local0)
}
// If temp less 35 or great then 115, set default 35
If (Or (LLess (Local0, 35), LGreater (Local0, 115)))
{
Store (35, Local0)
}
Return (CTOK (Local0))
}
}
}
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