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Diffstat (limited to 'src/mainboard/google/butterfly/acpi/thermal.asl')
-rw-r--r-- | src/mainboard/google/butterfly/acpi/thermal.asl | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/mainboard/google/butterfly/acpi/thermal.asl b/src/mainboard/google/butterfly/acpi/thermal.asl new file mode 100644 index 0000000000..5e0dd43e04 --- /dev/null +++ b/src/mainboard/google/butterfly/acpi/thermal.asl @@ -0,0 +1,81 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +// Thermal Zone + +Scope (\_TZ) +{ + 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 (_TMP, 0, Serialized) + { + // Get CPU Temperature from EC + Store (\_SB.PCI0.LPCB.EC0.CTMP, Local0) + + // Convert to 1/10 Kelvin + Multiply (Local0, 10, Local0) + + // Adjust by offset to get Kelvin + Add (Local0, 2732, Local0) + + Return (Local0) + } + +// The EC does all fan control. The is no Active Cooling Fan control (_ACx). + } +} + |