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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>
This commit is contained in:
haridhar 2015-12-04 10:41:23 +05:30 committed by Patrick Georgi
parent 425a466948
commit f991bf071a
1 changed files with 1 additions and 0 deletions
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src/mainboard/intel/kunimitsu/devicetree.cb
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@ -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