[coreboot-gerrit] Change in coreboot[master]: ec/purism/librem: Add ACPI temp reporting

[Matt DeVillier (Code Review)]

Matt DeVillier has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38835 )

Change subject: ec/purism/librem: Add ACPI temp reporting
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ec/purism/librem: Add ACPI temp reporting

Add EC ACPI reporting of current temp and platform critical temp.
Adapted from ACPI dump of ODM AMI firmware.

TEST: check reporting of current/critical temps via lm-sensors
from ACPI on Librem 13v1 and 13v4 boards.

Change-Id: I92641fbbdda46e0c388607a37f7a7cc2dcd6c26d
Signed-off-by: Matt DeVillier 
---
M src/ec/purism/librem/acpi/ec.asl
M src/mainboard/purism/librem_bdw/acpi/ec.asl
M src/mainboard/purism/librem_skl/acpi/ec.asl
3 files changed, 25 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/38835/1

diff --git a/src/ec/purism/librem/acpi/ec.asl b/src/ec/purism/librem/acpi/ec.asl
index ff325aa..6f6ced1 100644
--- a/src/ec/purism/librem/acpi/ec.asl
+++ b/src/ec/purism/librem/acpi/ec.asl
@@ -52,7 +52,9 @@
    OperationRegion (ERAM, EmbeddedControl, Zero, 0xFF)
    Field (ERAM, ByteAcc, Lock, Preserve)
    {
-		Offset (0x15),
+		Offset (0x13),
+		RTMP, 8,
+		, 8,
    	BSTS, 2,	/* Battery Status */
    	, 3,
    	BTEX, 1,	/* Battery Present */
@@ -231,3 +233,23 @@
    #include "ac.asl"
    #include "battery.asl"
 }
+
+Scope (_TZ)
+{
+	ThermalZone (TZ0)
+	{
+		/* _TMP: Temperature */
+		Method (_TMP, 0, Serialized)
+		{
+			Local0 = (0x0AAC + (_SB.PCI0.LPCB.EC.RTMP * 0x0A))
+			Return (Local0)
+		}
+
+		/* _CRT: Critical Temperature */
+		Method (_CRT, 0, Serialized)
+		{
+			/* defined in board ec.asl */
+			Return (CRIT_TEMP)
+		}
+	}
+}
diff --git a/src/mainboard/purism/librem_bdw/acpi/ec.asl b/src/mainboard/purism/librem_bdw/acpi/ec.asl
index b2fa5b9..a660a52 100644
--- a/src/mainboard/purism/librem_bdw/acpi/ec.asl
+++ b/src/mainboard/purism/librem_bdw/acpi/ec.asl
@@ -16,5 +16,6 @@
 #define EC_SCI_GPI 10
 #define PPCM_TURBO Zero
 #define PPCM_NOTURBO One
+#define CRIT_TEMP 105

#include <ec/purism/librem/acpi/ec.asl>
diff --git a/src/mainboard/purism/librem_skl/acpi/ec.asl b/src/mainboard/purism/librem_skl/acpi/ec.asl
index c667b6c..c440ff8 100644
--- a/src/mainboard/purism/librem_skl/acpi/ec.asl
+++ b/src/mainboard/purism/librem_skl/acpi/ec.asl
@@ -16,5 +16,6 @@
 #define EC_SCI_GPI 0x50
 #define PPCM_TURBO One
 #define PPCM_NOTURBO 0x02
+#define CRIT_TEMP 100

#include <ec/purism/librem/acpi/ec.asl>