Change in coreboot[master]: ec/mec1308: Fix fan control ACPI

[Matt DeVillier (Code Review)]

Matt DeVillier has uploaded this change for review. ( https://review.coreboot.org/20482

Change subject: ec/mec1308: Fix fan control ACPI
......................................................................

ec/mec1308: Fix fan control ACPI

Returing FSL# for _STA causes Windows to BSOD. Re-work _STA to instead
return 0/1 based on FLVL, using google/beltino as a model.

Also correct serialization type for  _CRS.

Change-Id: Ibf3af15bab3590f7c1c4401e1978dbcf2a495216
Signed-off-by: Matt DeVillier 
---
M src/ec/smsc/mec1308/acpi/ec.asl
1 file changed, 36 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/82/20482/1

diff --git a/src/ec/smsc/mec1308/acpi/ec.asl b/src/ec/smsc/mec1308/acpi/ec.asl
index a8de9fa..697e4b1 100644
--- a/src/ec/smsc/mec1308/acpi/ec.asl
+++ b/src/ec/smsc/mec1308/acpi/ec.asl
@@ -58,7 +58,7 @@
    	FCOS, 1,		// Fan Speed OS Control
    }

-	Method (_CRS, 0, NotSerialized)
+	Method (_CRS, 0, Serialized)
    {
    	Name (ECMD, ResourceTemplate()
    	{
@@ -87,7 +87,13 @@

PowerResource (FNP0, 0, 0)
    {
-		Method (_STA) { Return (FSL0) }
+		Method (_STA) {
+			If (LLessEqual (\FLVL, 0)) {
+				Return (One)
+			} Else {
+				Return (Zero)
+			}
+		}
    	Method (_ON)  {
    		If (FCOS) {
    			Store (One, FSL0)
@@ -106,7 +112,13 @@

PowerResource (FNP1, 0, 0)
    {
-		Method (_STA) { Return (FSL1) }
+		Method (_STA) {
+			If (LLessEqual (\FLVL, 0)) {
+				Return (One)
+			} Else {
+				Return (Zero)
+			}
+		}
    	Method (_ON)  {
    		If (FCOS) {
    			Store (One, FSL1)
@@ -125,7 +137,13 @@

PowerResource (FNP2, 0, 0)
    {
-		Method (_STA) { Return (FSL2) }
+		Method (_STA) {
+			If (LLessEqual (\FLVL, 0)) {
+				Return (One)
+			} Else {
+				Return (Zero)
+			}
+		}
    	Method (_ON)  {
    		If (FCOS) {
    			Store (One, FSL2)
@@ -144,7 +162,13 @@

PowerResource (FNP3, 0, 0)
    {
-		Method (_STA) { Return (FSL3) }
+		Method (_STA) {
+			If (LLessEqual (\FLVL, 0)) {
+				Return (One)
+			} Else {
+				Return (Zero)
+			}
+		}
    	Method (_ON)  {
    		If (FCOS) {
    			Store (One, FSL3)
@@ -163,7 +187,13 @@

PowerResource (FNP4, 0, 0)
    {
-		Method (_STA) { Return (FSL4) }
+		Method (_STA) {
+			If (LLessEqual (\FLVL, 0)) {
+				Return (One)
+			} Else {
+				Return (Zero)
+			}
+                }
    	Method (_ON)  {
    		If (FCOS) {
    			Store (One, FSL4)