From f991bf071a52ecdc38f5c8e647683a33db0e26db Mon Sep 17 00:00:00 2001 From: haridhar <haridhar.kalvala@intel.com> Date: Fri, 4 Dec 2015 10:41:23 +0530 Subject: intel/skylake: Enable SaGv feature This change enables SaGv feature for skylake platform.As a result of this patch the skylake platform will train memory at both low & high frequency points.This will be used to dynamically scale the work point (voltage/frequencies). The value "3" here means enable. Following is the table for same. 0=Disabled(SaGv disabled) 1=FixedLow(Fixed to low frequency) 2=FixedHigh(Fixed to High frequency) 3=Enabled(SaGv Enabled.Dynamically changes) BRANCH=None BUG=chrome-os-partner:48534 TEST=Built for kunimitsu. Tested on D1 silicon. Change-Id: I2892d631d64495e6aed453af4fd526f4bf5bed68 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 8e09d1a22927f5fcddd6c0be3f9edf3dcb8729be Original-Change-Id: I32a7a53805068a52b381affaf061d69062cd8651 Original-Signed-off-by: haridhar <haridhar.kalvala@intel.com> Original-Signed-off-by: Somayaji, Vishwanath <vishwanath.somayaji@intel.com> Original-Reviewed-on: https://chromium-review.googlesource.com/315806 Original-Commit-Ready: Haridhar Kalvala <haridhar.kalvala@intel.com> Original-Tested-by: Haridhar Kalvala <haridhar.kalvala@intel.com> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Original-Reviewed-by: Haridhar Kalvala <haridhar.kalvala@intel.com> Reviewed-on: https://review.coreboot.org/12997 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com> --- src/mainboard/intel/kunimitsu/devicetree.cb | 1 + 1 file changed, 1 insertion(+) (limited to 'src') diff --git a/src/mainboard/intel/kunimitsu/devicetree.cb b/src/mainboard/intel/kunimitsu/devicetree.cb index c5dc0283a6..e75959e075 100644 --- a/src/mainboard/intel/kunimitsu/devicetree.cb +++ b/src/mainboard/intel/kunimitsu/devicetree.cb @@ -30,6 +30,7 @@ chip soc/intel/skylake register "SkipExtGfxScan" = "1" register "Device4Enable" = "1" register "HeciEnabled" = "0" + register "SaGv" = "3" # Enabling SLP_S3#, SLP_S4#, SLP_SUS and SLP_A Stretch # SLP_S3 Minimum Assertion Width. Values 0: 60us, 1: 1ms, 2: 50ms, 3: 2s -- cgit v1.2.3