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mb/google/hatch: Add settings for noise mitgation 

Enable acoustic noise mitgation for hatch platform, the slow slew rates
are fast time dived by 8 and disable Fast PKG C State Ramp(IA, GT, SA).

BUG=b:131779678
TEST=waveform test and reduce the noise level.

Signed-off-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Change-Id: I49e834825b3f1e5bf02f9523d7caa93b544c9d17
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35005
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Dtrain Hsu 2019-08-20 13:27:50 +08:00 committed by Patrick Georgi
parent 0a8da746c2
commit b685e921bb
1 changed files with 9 additions and 0 deletions
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9
src/mainboard/google/hatch/variants/hatch/overridetree.cb
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@ -15,6 +15,15 @@ chip soc/intel/cannonlake
[PchSerialIoIndexUART2] = PchSerialIoDisabled,
}"
# VR Slew rate setting
register "AcousticNoiseMitigation" = "1"
register "SlowSlewRateForIa" = "2"
register "SlowSlewRateForGt" = "2"
register "SlowSlewRateForSa" = "2"
register "FastPkgCRampDisableIa" = "1"
register "FastPkgCRampDisableGt" = "1"
register "FastPkgCRampDisableSa" = "1"
# Intel Common SoC Config
#+-------------------+---------------------------+
#| Field | Value |