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-rw-r--r--src/mainboard/siemens/mc_ehl/variants/mc_ehl4/devicetree.cb4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl4/devicetree.cb b/src/mainboard/siemens/mc_ehl/variants/mc_ehl4/devicetree.cb
index 1bf99fd8377e..52da98e2e276 100644
--- a/src/mainboard/siemens/mc_ehl/variants/mc_ehl4/devicetree.cb
+++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl4/devicetree.cb
@@ -74,6 +74,10 @@ chip soc/intel/elkhartlake
register "PcieRpLtrDisable[3]" = "true"
register "PcieRpLtrDisable[4]" = "true"
+ # Determines PCIe root port speed
+ register "PcieRpPcieSpeed[3]" = "1"
+ register "PcieRpPcieSpeed[4]" = "1"
+
# Storage (SATA/SDCARD/EMMC) related UPDs
register "SataSalpSupport" = "0"
register "SataPortsEnable[0]" = "1"