--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * File: if_phonet.h
+ *
+ * Phonet interface kernel definitions
+ *
+ * Copyright (C) 2008 Nokia Corporation. All rights reserved.
+ */
+#ifndef LINUX_IF_PHONET_H
+#define LINUX_IF_PHONET_H
+
+#define PHONET_MIN_MTU 6 /* pn_length = 0 */
+#define PHONET_MAX_MTU 65541 /* pn_length = 0xffff */
+#define PHONET_DEV_MTU PHONET_MAX_MTU
+
+
+#endif /* LINUX_IF_PHONET_H */