diff --git a/src/mainboard/system76/kbl-u/acpi/superio.asl b/src/mainboard/system76/kbl-u/acpi/superio.asl
new file mode 100644
index 0000000000..9e01ed8b92
--- /dev/null
+++ b/src/mainboard/system76/kbl-u/acpi/superio.asl
@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <drivers/pc80/pc/ps2_controller.asl>
diff --git a/src/mainboard/system76/kbl-u/devicetree.cb b/src/mainboard/system76/kbl-u/devicetree.cb
index 2138fa537d..e25d16a8bf 100644
--- a/src/mainboard/system76/kbl-u/devicetree.cb
+++ b/src/mainboard/system76/kbl-u/devicetree.cb
@@ -122,8 +122,11 @@ chip soc/intel/skylake
 	register "usb3_ports[2]" = "USB3_PORT_DEFAULT(OC_SKIP)"     # Type C port right
 	register "usb3_ports[3]" = "USB3_PORT_DEFAULT(OC_SKIP)"     # Type-A port left
 
-	# PL2 override 44W
-	register "tdp_pl2_override" = "40"
+	# Power limit
+	register "power_limits_config" = "{
+		.tdp_pl1_override = 20,
+		.tdp_pl2_override = 30,
+	}"
 
 	# Send an extra VR mailbox command for the PS4 exit issue
 	register "SendVrMbxCmd" = "2"
diff --git a/src/mainboard/system76/kbl-u/ramstage.c b/src/mainboard/system76/kbl-u/ramstage.c
index 4149f6059c..25587f1470 100644
--- a/src/mainboard/system76/kbl-u/ramstage.c
+++ b/src/mainboard/system76/kbl-u/ramstage.c
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <arch/io.h>
 #include <console/console.h>
 #include <device/device.h>
 #include <option.h>