mb/google/volteer/variant/lindar: Disable acoustic mitigation
Roll back CPU slow slew rate setting to Intel default "SLEW_FAST_2"
Because baseboard modify slow slew rate setting to "SLEW_FASE_8"
for all project, but Lindar and Lillipup is using "SLEW_FAST_2",
so this setting need to roll back.
BUG=b:186140230
TEST=Build FW and boot to OS checking with CPU log.
Signed-off-by: Kevin Chang <kevin.chang@lcfc.corp-partner.google.com>
Change-Id: I7de252b26c75f8dad218f3eb79a0988e60964f4c
Signed-off-by: Kevin Chang <kevin.chang@lcfc.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52620
Reviewed-by: Zhuohao Lee <zhuohao@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/volteer/variants/lindar/overridetree.cb b/src/mainboard/google/volteer/variants/lindar/overridetree.cb
index 945d2e9..a1010d2 100644
--- a/src/mainboard/google/volteer/variants/lindar/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/lindar/overridetree.cb
@@ -57,6 +57,12 @@
[PchSerialIoIndexI2C4] = PchSerialIoDisabled,
[PchSerialIoIndexI2C5] = PchSerialIoPci,
}"
+
+ # Acoustic settings
+ register "AcousticNoiseMitigation" = "0"
+ register "SlowSlewRate" = "SLEW_FAST_2"
+ register "FastPkgCRampDisable" = "0"
+
device domain 0 on
device ref dptf on
chip drivers/intel/dptf