[coreboot-gerrit] Change in coreboot[master]: mb/google/poppy: Set UPD CmdTriStateDis for rammus

[Marx Wang (Code Review)]

Marx Wang has uploaded this change for review. ( https://review.coreboot.org/28568

Change subject: mb/google/poppy: Set UPD CmdTriStateDis for rammus
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mb/google/poppy: Set UPD CmdTriStateDis for rammus

This patch sets the MRC UPD CmdTriStateDis for the
rammus boards. Rammus is LPDDR3 design without RTT
for CMD/CTRL

BUG=none
TEST=Run memtester app and also webgl fishtank on
     the LPDDR3 kabylake boards and also check the
     margin data is proper in FSP.

Change-Id: Iee115f49ba5b36dc5b0425e9da02b58cd19b2236
Signed-off-by: marxwang 
---
M src/mainboard/google/poppy/variants/rammus/devicetree.cb
1 file changed, 3 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/68/28568/1

diff --git a/src/mainboard/google/poppy/variants/rammus/devicetree.cb b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
index 7c1b02f..f94b30d 100644
--- a/src/mainboard/google/poppy/variants/rammus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/rammus/devicetree.cb
@@ -27,6 +27,9 @@
    # Enable S0ix
    register "s0ix_enable" = "1"

+	# Disable Command TriState
+	register "CmdTriStateDis" = "1"
+
    # FSP Configuration
    register "ProbelessTrace" = "0"
    register "EnableLan" = "0"