[S] Change in coreboot[master]: mb/google/nissa/uldren: Configure the external V1p05/Vnn/VnnSx

[Dtrain Hsu (Code Review)]

Dtrain Hsu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/74335 )

Change subject: mb/google/nissa/uldren: Configure the external V1p05/Vnn/VnnSx
......................................................................

mb/google/nissa/uldren: Configure the external V1p05/Vnn/VnnSx

This patch configures external V1p05/Vnn/VnnSx rails for Uldren
to achieve the better power savings.
* Enable the external V1p05, Vnn, VnnSx rails in S0i1, S0i2, S0i3, S3,
  S4, S5 , S0 states.
* Set the supported voltage states.
* Set the voltage for v1p05 and vnn.
* Set the ICC max for v1p05 and vnn.

BUG=b:272829190
TEST=emerge-nissa coreboot

Change-Id: I3ff8e7db33bfbe4048327825406462262e8d2919
Signed-off-by: Dtrain Hsu 
---
M src/mainboard/google/brya/variants/uldren/overridetree.cb
1 file changed, 36 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/74335/1

diff --git a/src/mainboard/google/brya/variants/uldren/overridetree.cb b/src/mainboard/google/brya/variants/uldren/overridetree.cb
index dbe46ed..e88389f 100644
--- a/src/mainboard/google/brya/variants/uldren/overridetree.cb
+++ b/src/mainboard/google/brya/variants/uldren/overridetree.cb
@@ -25,6 +25,21 @@
    	[PchSerialIoIndexI2C5] = PchSerialIoPci,
    }"

+	# Configure external V1P05/Vnn/VnnSx Rails
+	register "ext_fivr_settings" = "{
+		.configure_ext_fivr = 1,
+		.v1p05_enable_bitmap = FIVR_ENABLE_ALL_SX & ~FIVR_ENABLE_S0,
+		.vnn_enable_bitmap = FIVR_ENABLE_ALL_SX,
+		.vnn_sx_enable_bitmap = FIVR_ENABLE_ALL_SX,
+		.v1p05_supported_voltage_bitmap = FIVR_VOLTAGE_NORMAL,
+		.vnn_supported_voltage_bitmap = FIVR_VOLTAGE_MIN_ACTIVE,
+		.v1p05_voltage_mv = 1050,
+		.vnn_voltage_mv = 780,
+		.vnn_sx_voltage_mv = 1050,
+		.v1p05_icc_max_ma = 500,
+		.vnn_icc_max_ma = 500,
+	}"
+	
    # Intel Common SoC Config
    #+-------------------+---------------------------+
    #| Field             |  Value                    |