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-rw-r--r--src/mainboard/google/panther/devicetree.cb3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mainboard/google/panther/devicetree.cb b/src/mainboard/google/panther/devicetree.cb
index 9fbe8e62b3..7cc3672f84 100644
--- a/src/mainboard/google/panther/devicetree.cb
+++ b/src/mainboard/google/panther/devicetree.cb
@@ -61,6 +61,9 @@ chip northbridge/intel/haswell
register "sio_i2c0_voltage" = "0" # 3.3V
register "sio_i2c1_voltage" = "0" # 3.3V
+ # Force enable ASPM for PCIe Port 4
+ register "pcie_port_force_aspm" = "0x10"
+
# Enable port coalescing
register "pcie_port_coalesce" = "1"