| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| // 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 (LEqual (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 |
| 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 (TCHK, 0, Serialized) |
| { |
| // Get Temperature from TIN# set in NVS |
| Store (\_SB.PCI0.LPCB.EC0.TINS (TMPS), Local0) |
| |
| // Check for sensor not calibrated |
| If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TNCA)) { |
| Return (CTOK(0)) |
| } |
| |
| // Check for sensor not present |
| If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TNPR)) { |
| Return (CTOK(0)) |
| } |
| |
| // Check for sensor not powered |
| If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TNOP)) { |
| Return (CTOK(0)) |
| } |
| |
| // Check for sensor bad reading |
| If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TBAD)) { |
| Return (CTOK(0)) |
| } |
| |
| // Adjust by offset to get Kelvin |
| Add (\_SB.PCI0.LPCB.EC0.TOFS, Local0, Local0) |
| |
| // Convert to 1/10 Kelvin |
| Multiply (Local0, 10, Local0) |
| Return (Local0) |
| } |
| |
| Method (_TMP, 0, Serialized) |
| { |
| // Get temperature from EC in deci-kelvin |
| Store (TCHK (), Local0) |
| |
| // Critical temperature in deci-kelvin |
| Store (CTOK (\TCRT), Local1) |
| |
| If (LGreaterEqual (Local0, Local1)) { |
| Store ("CRITICAL TEMPERATURE", Debug) |
| Store (Local0, Debug) |
| |
| // Wait 1 second for EC to re-poll |
| Sleep (1000) |
| |
| // Re-read temperature from EC |
| Store (TCHK (), Local0) |
| |
| Store ("RE-READ TEMPERATURE", Debug) |
| Store (Local0, Debug) |
| } |
| |
| Return (Local0) |
| } |
| } |
| } |