diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 13aa70d..f08709d 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -937,7 +937,7 @@
 	return -1;
 }
 
-const struct ehci_ops default_ehci_ops = {
+static const struct ehci_ops default_ehci_ops = {
 	.set_usb_mode		= ehci_set_usbmode,
 	.get_port_speed		= ehci_get_port_speed,
 	.powerup_fixup		= ehci_powerup_fixup,
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index 110ddc9..efc5d4e 100644
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -373,8 +373,8 @@
 }
 
 /* returns 0 if no match, 1 if match */
-int usb_match_device(const struct usb_device_descriptor *desc,
-		     const struct usb_device_id *id)
+static int usb_match_device(const struct usb_device_descriptor *desc,
+			    const struct usb_device_id *id)
 {
 	if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
 	    id->idVendor != le16_to_cpu(desc->idVendor))
@@ -410,9 +410,9 @@
 }
 
 /* returns 0 if no match, 1 if match */
-int usb_match_one_id_intf(const struct usb_device_descriptor *desc,
-			  const struct usb_interface_descriptor *int_desc,
-			  const struct usb_device_id *id)
+static int usb_match_one_id_intf(const struct usb_device_descriptor *desc,
+			const struct usb_interface_descriptor *int_desc,
+			const struct usb_device_id *id)
 {
 	/* The interface class, subclass, protocol and number should never be
 	 * checked for a match if the device class is Vendor Specific,
@@ -445,9 +445,9 @@
 }
 
 /* returns 0 if no match, 1 if match */
-int usb_match_one_id(struct usb_device_descriptor *desc,
-		     struct usb_interface_descriptor *int_desc,
-		     const struct usb_device_id *id)
+static int usb_match_one_id(struct usb_device_descriptor *desc,
+			    struct usb_interface_descriptor *int_desc,
+			    const struct usb_device_id *id)
 {
 	if (!usb_match_device(desc, id))
 		return 0;
@@ -680,7 +680,7 @@
 	return change;
 }
 
-int usb_child_post_bind(struct udevice *dev)
+static int usb_child_post_bind(struct udevice *dev)
 {
 	struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
 	int val;
diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index 33961cd..a4591f2 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -19,7 +19,7 @@
 			DWC3_GCTL_PRTCAPDIR(mode));
 }
 
-void dwc3_phy_reset(struct dwc3 *dwc3_reg)
+static void dwc3_phy_reset(struct dwc3 *dwc3_reg)
 {
 	/* Assert USB3 PHY reset */
 	setbits_le32(&dwc3_reg->g_usb3pipectl[0], DWC3_GUSB3PIPECTL_PHYSOFTRST);
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 3201177..bd8f4c4 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -192,7 +192,7 @@
  * @param hcor	pointer to host controller operation registers
  * @return -EBUSY if XHCI Controller is not halted else status of handshake
  */
-int xhci_reset(struct xhci_hcor *hcor)
+static int xhci_reset(struct xhci_hcor *hcor)
 {
 	u32 cmd;
 	u32 state;
@@ -481,7 +481,7 @@
  * @param udev	pointer to the Device Data Structure
  * @return Returns 0 on succes else return error code on failure
  */
-int _xhci_alloc_device(struct usb_device *udev)
+static int _xhci_alloc_device(struct usb_device *udev)
 {
 	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	union xhci_trb *event;