316466b765
Change-Id: Ie802b540cea13000227c969bbc262f034d1b6b84 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/46177 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
84 lines
1.5 KiB
Plaintext
84 lines
1.5 KiB
Plaintext
/* SPDX-License-Identifier: GPL-2.0-only */
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// Thermal Zone
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External (\PPKG, MethodObj)
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#define HAVE_THERMALZONE
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Scope (\_TZ)
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{
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ThermalZone (THRM)
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{
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Name (_TC1, 0x02)
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Name (_TC2, 0x05)
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// Ignore critical temps for the first few reads
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// at boot to prevent unexpected shutdown
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Name (IRDC, 4)
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Name (CRDC, 0)
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// Thermal zone polling frequency: 10 seconds
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Name (_TZP, 100)
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// Thermal sampling period for passive cooling: 2 seconds
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Name (_TSP, 20)
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// Convert from Degrees C to 1/10 Kelvin for ACPI
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Method (CTOK, 1) {
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// 10th of Degrees C
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Local0 = Arg0 * 10
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// Convert to Kelvin
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Local0 += 2732
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Return (Local0)
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}
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// Threshold for OS to shutdown
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Method (_CRT, 0, Serialized)
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{
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Return (CTOK (\TCRT))
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}
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// Threshold for passive cooling
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Method (_PSV, 0, Serialized)
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{
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Return (CTOK (\TPSV))
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}
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// Processors used for passive cooling
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Method (_PSL, 0, Serialized)
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{
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Return (\PPKG ())
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}
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Method (_TMP, 0, Serialized)
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{
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// Get CPU Temperature from the Embedded Controller
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Local0 = \_SB.PCI0.LPCB.EC0.CTMP
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// Re-read from EC if the temperature is very high to
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// avoid OS shutdown if we got a bad reading.
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If (Local0 >= \TCRT) {
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Local0 = \_SB.PCI0.LPCB.EC0.CTMP
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If (Local0 >= \TCRT) {
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// Check if this is an early read
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If (CRDC < IRDC) {
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Local0 = 0
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}
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}
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}
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// Keep track of first few reads by the OS
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If (CRDC < IRDC) {
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CRDC++
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}
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Return (CTOK (Local0))
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}
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// The EC does all fan control. The is no Active Cooling Fan control (_ACx).
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}
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}
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