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mb/google/volteer: Enable External Bypass, ClkGate & PhyGate

Sets the soc config options for ExternalBypass, ExternalClkGate and
ExternalPhyGate. These are used to enable or disable respective S0ix
substates.

BUG=b:177821896
TEST=Build coreboot for volteer

Signed-off-by: Shreesh Chhabbi <shreesh.chhabbi@intel.corp-partner.google.com>
Change-Id: I9e5218cda79d7453bf830639ccea4e5be019b070
---
M src/mainboard/google/volteer/variants/baseboard/devicetree.cb
1 file changed, 9 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/90/50290/1
diff --git a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
index d74476a..0bbcdba 100644
--- a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
@@ -250,6 +250,15 @@

# Enable DPTF
register "dptf_enable" = "1"
+
+ # Enable External Bypass
+ register "ExternalBypass" = "1"
+
+ # Enable External Clk Gate
+ register "ExternalClkGated" = "1"
+
+ # Enable External Phy Gate
+ register "ExternalPhyGated" = "1"

register "power_limits_config[POWER_LIMITS_U_2_CORE]" = "{
.tdp_pl1_override = 15,

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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: I9e5218cda79d7453bf830639ccea4e5be019b070
Gerrit-Change-Number: 50290
Gerrit-PatchSet: 1
Gerrit-Owner: Shreesh Chhabbi <shreesh.chhabbi@intel.com>
Gerrit-Reviewer: Shreesh Chhabbi <shreesh.chhabbi@intel.corp-partner.google.com>
Gerrit-Attention: Shreesh Chhabbi <shreesh.chhabbi@intel.corp-partner.google.com>
Gerrit-MessageType: newchange