Change in coreboot[master]: mb/google/dedede/var/blipper: Configure Acoustic noise mitigation UPDs

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/55610 )

Change subject: mb/google/dedede/var/blipper: Configure Acoustic noise mitigation UPDs
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mb/google/dedede/var/blipper: Configure Acoustic noise mitigation UPDs

Enable Acoustic noise mitigation for blipper and set slew rate to 1/8
which is calibrated value for the board.

BUG=b:187760191
BRANCH=dedede
TEST=build firmware to UPD and Acoustic noise test

Change-Id: I187702c23712416eaaaaf1e210dcfc6b2c560041
Signed-off-by: Zanxi Chen 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55610
Tested-by: build bot (Jenkins) 
Reviewed-by: Karthik Ramasubramanian 
---
M src/mainboard/google/dedede/variants/blipper/overridetree.cb
1 file changed, 6 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Karthik Ramasubramanian: Looks good to me, approved

diff --git a/src/mainboard/google/dedede/variants/blipper/overridetree.cb b/src/mainboard/google/dedede/variants/blipper/overridetree.cb
index 4f83dc0..280ed5d 100644
--- a/src/mainboard/google/dedede/variants/blipper/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/blipper/overridetree.cb
@@ -52,6 +52,12 @@

register "tcc_offset" = "10"    # TCC of 95C

+	# 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