From ec76ae082a985981cc9472c86e87ca5a3d623b84 Mon Sep 17 00:00:00 2001 From: Stanley Wu Date: Tue, 6 Apr 2021 18:27:31 +0800 Subject: [PATCH] mb/google/dedede/var/boten: Configure Acoustic noise mitigation UPDs Enable Acoustic noise mitigation for boten and set slew rate to 1/8 which is calibrated value for the board. BUG=b:180668001 BRANCH=dedede TEST=build firmware to UPD and Acoustic noise test Change-Id: I75851bd7c279feeab4ab94f4c82d55bf0e5ce316 Signed-off-by: Stanley Wu Reviewed-on: https://review.coreboot.org/c/coreboot/+/52135 Tested-by: build bot (Jenkins) Reviewed-by: Karthik Ramasubramanian --- src/mainboard/google/dedede/variants/boten/overridetree.cb | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/mainboard/google/dedede/variants/boten/overridetree.cb b/src/mainboard/google/dedede/variants/boten/overridetree.cb index 34044ff569..f914b82b79 100644 --- a/src/mainboard/google/dedede/variants/boten/overridetree.cb +++ b/src/mainboard/google/dedede/variants/boten/overridetree.cb @@ -74,6 +74,12 @@ chip soc/intel/jasperlake [PchSerialIoIndexI2C5] = PchSerialIoPci, }" + # Enable Acoustic noise mitigation and set slew rate to 1/8 + # Rest of the parameters are 0 by default. + register "AcousticNoiseMitigation" = "1" + register "SlowSlewRate" = "SlewRateFastBy8" + register "FastPkgCRampDisable" = "1" + device domain 0 on device pci 04.0 on chip drivers/intel/dptf