[coreboot-gerrit] Change in ...coreboot[master]: soc/intel/common/dptf: Add method for temp conversion

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change and it was merged. ( https://review.coreboot.org/c/coreboot/+/29758 )

Change subject: soc/intel/common/dptf: Add method for temp conversion
......................................................................

soc/intel/common/dptf: Add method for temp conversion

Add a method to convert from 1/10 Kelvin to Celsius.  This
is useful for EC devices where the sensor temperature are
stored in Celsius instead of Kelvin.

Change-Id: I6b1154f5ba13416131a029966d6d5c1598904881
Signed-off-by: Duncan Laurie 
Reviewed-on: https://review.coreboot.org/c/29758
Reviewed-by: Furquan Shaikh 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/common/acpi/dptf/dptf.asl
1 file changed, 15 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Furquan Shaikh: Looks good to me, approved

diff --git a/src/soc/intel/common/acpi/dptf/dptf.asl b/src/soc/intel/common/acpi/dptf/dptf.asl
index beb41e2..1dd57c0 100644
--- a/src/soc/intel/common/acpi/dptf/dptf.asl
+++ b/src/soc/intel/common/acpi/dptf/dptf.asl
@@ -95,6 +95,21 @@
    	Return (Local0)
    }

+	/* Convert from 1/10 Kelvin to Degrees C for ACPI */
+	Method (KTOC, 1) {
+		If (LLessEqual (Arg0, 2732)) {
+			Return (0)
+		}
+
+		/* Convert to Celsius */
+		Subtract (Arg0, 2732, Local0)
+
+		/* Convert from 10th of degrees */
+		Divide (Local0, 10,, Local0)
+
+		Return (Local0)
+	}
+
    /* Include Thermal Participants */
    #include "thermal.asl"