diff --git a/include/dt-bindings/clk/at91.h b/include/dt-bindings/clk/at91.h
index e30756b..a178b94 100644
--- a/include/dt-bindings/clk/at91.h
+++ b/include/dt-bindings/clk/at91.h
@@ -18,5 +18,10 @@
 #define PMC_TYPE_PERIPHERAL	3
 #define PMC_TYPE_GCK		4
 #define PMC_TYPE_SLOW		5
+#define USB_UTMI		6
+
+#define USB_UTMI1		0
+#define USB_UTMI2		1
+#define USB_UTMI3		2
 
 #endif