[coreboot-gerrit] [S] Change in coreboot[master]: mb/google/rex/var/ovis: Enable SaGv

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/76138?usp=email )

Change subject: mb/google/rex/var/ovis: Enable SaGv
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mb/google/rex/var/ovis: Enable SaGv

This patch enables SaGv with fixed frequency and gears for Ovis.

Restrict memory speed to 6400 MTS as per board design.

BUG=b:282164577
TEST=Verified the settings on google/ovis using debug FSP logs

Change-Id: Ia9703344a8ae9d2ba44a16c62afab820fd8e2177
Signed-off-by: Subrata Banik 
---
M src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb
1 file changed, 14 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/76138/1

diff --git a/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb b/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb
index bfe991b..0d639e3 100644
--- a/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb
+++ b/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb
@@ -39,6 +39,20 @@
    # Enable CNVi BT
    register "cnvi_bt_core" = "true"

+	register "sagv" = "SAGV_ENABLED"
+
+	register "sagv_freq_mhz[0]" = "3200"
+	register "sagv_gear[0]" = "4"
+
+	register "sagv_freq_mhz[1]" = "6000"
+	register "sagv_gear[1]" = "4"
+
+	register "sagv_freq_mhz[2]" = "6400"
+	register "sagv_gear[2]" = "4"
+
+	register "sagv_freq_mhz[3]" = "5600"
+	register "sagv_gear[3]" = "2"
+
    # Set on-board graphics as primary display
    register "skip_ext_gfx_scan" = "1"