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/* SPDX-License-Identifier: GPL-2.0-only */
// Thermal Zone
External (\PPKG, MethodObj)
#define HAVE_THERMALZONE
Scope (\_TZ)
{
// Handler for throttle requests on this platform
// 0 = Stop throttling
// 1 = Start throttling
Method (THRT, 1, Serialized)
{
If (Arg0 == 0) {
/* Disable Power Limit */
\_SB.PCI0.MCHC.CTLD ()
} Else {
/* Enable Power Limit */
\_SB.PCI0.MCHC.CTLE (\F0PW)
}
}
ThermalZone (THRM)
{
Name (_TC1, 0x02)
Name (_TC2, 0x05)
// Thermal zone polling frequency: 10 seconds
Name (_TZP, 100)
// Thermal sampling period for passive cooling: 2 seconds
Name (_TSP, 20)
// Convert from Degrees C to 1/10 Kelvin for ACPI
Method (CTOK, 1) {
// 10th of Degrees C
Local0 = Arg0 * 10
// Convert to Kelvin
Local0 += 2732
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 (TCHK, 0, Serialized)
{
// Get Temperature from TIN# set in NVS
Local0 = \_SB.PCI0.LPCB.EC0.TINS (TMPS)
// Check for sensor not calibrated
If (Local0 == \_SB.PCI0.LPCB.EC0.TNCA) {
Return (CTOK(0))
}
// Check for sensor not present
If (Local0 == \_SB.PCI0.LPCB.EC0.TNPR) {
Return (CTOK(0))
}
// Check for sensor not powered
If (Local0 == \_SB.PCI0.LPCB.EC0.TNOP) {
Return (CTOK(0))
}
// Check for sensor bad reading
If (Local0 == \_SB.PCI0.LPCB.EC0.TBAD) {
Return (CTOK(0))
}
// Adjust by offset to get Kelvin
Local0 += \_SB.PCI0.LPCB.EC0.TOFS
// Convert to 1/10 Kelvin
Local0 *= 10
Return (Local0)
}
Method (_TMP, 0, Serialized)
{
// Get temperature from EC in deci-kelvin
Local0 = TCHK ()
// Critical temperature in deci-kelvin
Local1 = CTOK (\TCRT)
If (Local0 >= Local1) {
Printf ("CRITICAL TEMPERATURE: %o", Local0)
// Wait 1 second for EC to re-poll
Sleep (1000)
// Re-read temperature from EC
Local0 = TCHK ()
Printf ("RE-READ TEMPERATURE: %o", Local0)
}
Return (Local0)
}
}
}
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