Change in coreboot[master]: ec/lenovo/h8/acpi/thermal: Don't hardcode limits

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/21159

Change subject: ec/lenovo/h8/acpi/thermal: Don't hardcode limits
......................................................................

ec/lenovo/h8/acpi/thermal: Don't hardcode limits

Add support for board specific critical and passive
limits using GNVS table. Use default values if no
board specific limit exists.

* Add ACPI methods _TZP, _TSP and _PSV.
* Update ACPI method _CRT to use board specific if available.

Tested on Lenovo T500.

Change-Id: If438a909f4415f50cd7a764fb5fba7ec29599606
Signed-off-by: Patrick Rudolph 
---
M src/ec/lenovo/h8/acpi/thermal.asl
1 file changed, 25 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/59/21159/1

diff --git a/src/ec/lenovo/h8/acpi/thermal.asl b/src/ec/lenovo/h8/acpi/thermal.asl
index 2e95b69..84e23f9 100644
--- a/src/ec/lenovo/h8/acpi/thermal.asl
+++ b/src/ec/lenovo/h8/acpi/thermal.asl
@@ -34,9 +34,28 @@

ThermalZone(THM0)
    {
+		/* Thermal zone polling frequency: 10 seconds */
+		Name (_TZP, 100)
+
+		/* Thermal sampling period for passive cooling: 10 seconds */
+		Name (_TSP, 100)
+
    	Method(_CRT, 0, NotSerialized) {
+			Store (\TCRT, Local0)
+			if (LGreater(Local0, Zero)) {
+				Return (C2K(Local0))
+			}
    		Return (C2K(127))
    	}
+
+		Method(_PSV, 0, NotSerialized) {
+			Store (\TPSV, Local0)
+			if (LGreater(Local0, Zero)) {
+				Return (C2K(Local0))
+			}
+			Return (C2K(95))
+		}
+
    	Method(_TMP) {
 #if defined (EC_LENOVO_H8_ME_WORKAROUND)
    		/* Avoid tripping alarm if ME isn't booted at all yet */
@@ -51,6 +70,12 @@

ThermalZone(THM1)
    {
+		/* Thermal zone polling frequency: 10 seconds */
+		Name (_TZP, 100)
+
+		/* Thermal sampling period for passive cooling: 10 seconds */
+		Name (_TSP, 100)
+
    	Method(_CRT, 0, NotSerialized) {
    		Return (C2K(99))
    	}