diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index 9e0020d9e4c8cc01353ef4b804a9ba9d50bc8cfd..abd5050a4899bdb4518294175477a418583c4e83 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -24,7 +24,7 @@ struct fsl_usb2_dev_data {
 	enum fsl_usb2_operating_modes op_mode;	/* operating mode */
 };
 
-struct fsl_usb2_dev_data dr_mode_data[] = {
+static struct fsl_usb2_dev_data dr_mode_data[] = {
 	{
 		.dr_mode = "host",
 		.drivers = { "fsl-ehci", NULL, NULL, },
@@ -42,7 +42,7 @@ struct fsl_usb2_dev_data dr_mode_data[] = {
 	},
 };
 
-struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
+static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
 {
 	const unsigned char *prop;
 	int i;
@@ -75,7 +75,7 @@ static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
 	return FSL_USB2_PHY_NONE;
 }
 
-struct platform_device *fsl_usb2_device_register(
+static struct platform_device *fsl_usb2_device_register(
 					struct platform_device *ofdev,
 					struct fsl_usb2_platform_data *pdata,
 					const char *name, int id)