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diff --git a/src/superio/aspeed/ast2400/ast2400.h b/src/superio/aspeed/ast2400/ast2400.h
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+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
+ * Copyright (C) 2018 Eltan B.V.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef SUPERIO_ASPEED_AST2400_H
+#define SUPERIO_ASPEED_AST2400_H
+
+#define AST2400_SUART1 0x2 /* Com1 */
+#define AST2400_SUART2 0x3 /* Com2 */
+#define AST2400_SWAK 0x4 /* System Wake-Up control */
+#define AST2400_KBC 0x5 /* Keyboard controller */
+#define AST2400_GPIO 0x7 /* GPIO */
+#define AST2400_SUART3 0xB /* Com3 */
+#define AST2400_SUART4 0xC /* Com4 */
+#define AST2400_ILPC2AHB 0xD /* LPC 2 AHB */
+#define AST2400_MAILBOX 0xE /* Mailbox */
+
+#endif /* SUPERIO_ASPEED_AST2400_H */