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mb/purism/librem_mini: Enable acoustic noise mitigation 

Enable FastPkgCRampDisable for all domains, set SlowSlewRate to fast/16
for all domains. This aligns the settings with the Librem 14.

Test: boot Librem Mini v2, observe high frequency acoustic noise reduced.

Change-Id: I10bc2a3e6b631b8c0b430e204f376aa9a81ac683
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55658
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Matt DeVillier 2021-06-15 10:50:17 -05:00 committed by Patrick Georgi
parent 4ccbd49617
commit 46b642f86c
1 changed files with 10 additions and 0 deletions
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10
src/mainboard/purism/librem_cnl/variants/librem_mini/devicetree.cb
View File

@ -22,6 +22,16 @@ chip soc/intel/cannonlake
# Misc
register "AcousticNoiseMitigation" = "1"
register "FastPkgCRampDisableIa" = "1"
register "FastPkgCRampDisableGt" = "1"
register "FastPkgCRampDisableSa" = "1"
register "FastPkgCRampDisableFivr" = "1"
register "SlowSlewRateForIa" = "3" # fast/16
register "SlowSlewRateForGt" = "3" # fast/16
register "SlowSlewRateForSa" = "3" # fast/16
register "SlowSlewRateForFivr" = "3" # fast/16
# Power
register "PchPmSlpS3MinAssert" = "3" # 50ms
register "PchPmSlpS4MinAssert" = "1" # 1s