[coreboot-gerrit] New patch to review for coreboot: skylake: Add target offset for throttling action

[Sumeet R Pawnikar]

Sumeet R Pawnikar ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17889

-gerrit

commit bcd3adf980285f9e3a3ff0af73d631691cf8f7bc
Author: Sumeet Pawnikar 
Date:   Thu Dec 15 19:29:51 2016 +0530

skylake: Add target offset for throttling action

This patch adds the target offset to 10 degree C
    to adjust the thermal throttling action at prochot
    activation temperature from the default temperature
    target.

BUG=chrome-os-partner:59397
    BRANCH=None.
    TEST=Built for skylake platform and verified the target
    offset value before and after S3.

Change-Id: Iacf64cbc40871bbec3bede65f196bf292e0149a6
    Signed-off-by: Sumeet Pawnikar 
---
 src/soc/intel/skylake/cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/soc/intel/skylake/cpu.c b/src/soc/intel/skylake/cpu.c
index 3ec8d2c..0458a93 100644
--- a/src/soc/intel/skylake/cpu.c
+++ b/src/soc/intel/skylake/cpu.c
@@ -206,6 +206,8 @@ static void configure_thermal_target(void)
    	wrmsr(MSR_TEMPERATURE_TARGET, msr);
    }
    msr = rdmsr(MSR_TEMPERATURE_TARGET);
+	msr.lo &= ~(0xf << 24); /* Bits 27:24 */
+	msr.lo |= 0xa << 24; /* set target offset as 10 degree C */
    msr.lo &= ~0x7f; /* Bits 6:0 */
    msr.lo |= 0xe6; /* setting 100ms thermal time window */
    wrmsr(MSR_TEMPERATURE_TARGET, msr);