diff --git a/src/mainboard/google/beltino/devicetree.cb b/src/mainboard/google/beltino/devicetree.cb
index 89758dd1f5..f4c9e850ab 100644
--- a/src/mainboard/google/beltino/devicetree.cb
+++ b/src/mainboard/google/beltino/devicetree.cb
@@ -55,10 +55,6 @@ chip northbridge/intel/haswell
 			register "sata_port_map" = "0x1"
 			register "sata_devslp_disable" = "0x1"
 
-			register "sio_acpi_mode" = "0"
-			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"
 
diff --git a/src/mainboard/google/jecht/devicetree.cb b/src/mainboard/google/jecht/devicetree.cb
index d34bf7a5d5..19d0c48e07 100644
--- a/src/mainboard/google/jecht/devicetree.cb
+++ b/src/mainboard/google/jecht/devicetree.cb
@@ -30,10 +30,6 @@ chip soc/intel/broadwell
 	register "sata_port_map" = "0x1"
 	register "sata_devslp_disable" = "0x1"
 
-	register "sio_acpi_mode" = "0"
-	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"