Index: sys/dev/extres/phy/phy.h
===================================================================
--- sys/dev/extres/phy/phy.h
+++ sys/dev/extres/phy/phy.h
@@ -37,6 +37,10 @@
 
 #define	PHY_STATUS_ENABLED	0x00000001
 
+#define	PHY_MODE_USB_HOST	1
+#define	PHY_MODE_USB_OTG	2
+#define	PHY_MODE_USB_DEVICE	3
+
 typedef struct phy *phy_t;
 
 /* Initialization parameters. */
@@ -68,6 +72,7 @@
 int phynode_enable(struct phynode *phynode);
 int phynode_disable(struct phynode *phynode);
 int phynode_status(struct phynode *phynode, int *status);
+int phynode_set_mode(struct phynode *phynode, int mode);
 #ifdef FDT
 phandle_t phynode_get_ofw_node(struct phynode *phynode);
 #endif
@@ -81,6 +86,7 @@
 int phy_enable(phy_t phy);
 int phy_disable(phy_t phy);
 int phy_status(phy_t phy, int *value);
+int phy_set_mode(phy_t phy, int mode);
 
 #ifdef FDT
 int phy_get_by_ofw_name(device_t consumer, phandle_t node, char *name,
Index: sys/dev/extres/phy/phy.c
===================================================================
--- sys/dev/extres/phy/phy.c
+++ sys/dev/extres/phy/phy.c
@@ -59,6 +59,7 @@
 static int phynode_method_init(struct phynode *phynode);
 static int phynode_method_enable(struct phynode *phynode, bool disable);
 static int phynode_method_status(struct phynode *phynode, int *status);
+static int phynode_method_set_mode(struct phynode *phynode, int mode);
 
 
 /*
@@ -68,6 +69,7 @@
 	PHYNODEMETHOD(phynode_init,		phynode_method_init),
 	PHYNODEMETHOD(phynode_enable,		phynode_method_enable),
 	PHYNODEMETHOD(phynode_status,		phynode_method_status),
+	PHYNODEMETHOD(phynode_set_mode,		phynode_method_set_mode),
 
 	PHYNODEMETHOD_END
 };
@@ -150,6 +152,13 @@
 	return (0);
 }
 
+static int
+phynode_method_set_mode(struct phynode *phynode, int  mode)
+{
+
+	return (EOPNOTSUPP);
+}
+
 /* ----------------------------------------------------------------------------
  *
  * Internal functions.
@@ -335,6 +344,22 @@
 	return (rv);
 }
 
+/*
+ * Set phy mode.
+ */
+int
+phynode_set_mode(struct phynode *phynode, int mode)
+{
+	int rv;
+
+	PHY_TOPO_ASSERT();
+
+	PHYNODE_XLOCK(phynode);
+	rv = PHYNODE_SET_MODE(phynode, mode);
+	PHYNODE_UNLOCK(phynode);
+	return (0);
+}
+
  /* --------------------------------------------------------------------------
  *
  * Phy consumers interface.
@@ -458,6 +483,22 @@
 	free(phy, M_PHY);
 }
 
+int
+phy_set_mode(phy_t phy, int mode)
+{
+	int rv;
+	struct phynode *phynode;
+
+	phynode = phy->phynode;
+	KASSERT(phynode->ref_cnt > 0,
+	   ("Attempt to access unreferenced phy.\n"));
+
+	PHY_TOPO_SLOCK();
+	rv = phynode_set_mode(phynode, mode);
+	PHY_TOPO_UNLOCK();
+	return (rv);
+}
+
 #ifdef FDT
 int phydev_default_ofw_map(device_t provider, phandle_t xref, int ncells,
     pcell_t *cells, intptr_t *id)
Index: sys/dev/extres/phy/phynode_if.m
===================================================================
--- sys/dev/extres/phy/phynode_if.m
+++ sys/dev/extres/phy/phynode_if.m
@@ -58,4 +58,11 @@
 	int		*status;    /* PHY_STATUS_* */
 };
 
-
+#
+# Set phy mode
+# Returns 0 on success or a standard errno value.
+#
+METHOD int set_mode {
+	struct phynode	*phynode;
+	int	mode;
+};