diff --git a/include/dt-bindings/phy/phy-ocelot-serdes.h b/include/dt-bindings/phy/phy-ocelot-serdes.h
new file mode 100644
index 0000000..fe70ada
--- /dev/null
+++ b/include/dt-bindings/phy/phy-ocelot-serdes.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/* Copyright (c) 2018 Microsemi Corporation */
+#ifndef __PHY_OCELOT_SERDES_H__
+#define __PHY_OCELOT_SERDES_H__
+
+#define SERDES1G(x)	(x)
+#define SERDES1G_MAX	SERDES1G(5)
+#define SERDES6G(x)	(SERDES1G_MAX + 1 + (x))
+#define SERDES6G_MAX	SERDES6G(2)
+#define SERDES_MAX	(SERDES6G_MAX + 1)
+
+#endif