diff --git a/lib/libusb/Makefile b/lib/libusb/Makefile
--- a/lib/libusb/Makefile
+++ b/lib/libusb/Makefile
@@ -225,6 +225,7 @@
 MLINKS += libusb20.3 libusb20_dev_get_stats.3
 MLINKS += libusb20.3 libusb20_dev_close.3
 MLINKS += libusb20.3 libusb20_dev_detach_kernel_driver.3
+MLINKS += libusb20.3 libusb20_dev_attach_kernel_driver.3
 MLINKS += libusb20.3 libusb20_dev_set_config_index.3
 MLINKS += libusb20.3 libusb20_dev_get_debug.3
 MLINKS += libusb20.3 libusb20_dev_get_fd.3
diff --git a/lib/libusb/libusb.h b/lib/libusb/libusb.h
--- a/lib/libusb/libusb.h
+++ b/lib/libusb/libusb.h
@@ -202,8 +202,8 @@
 	LIBUSB_CAP_HAS_HID_ACCESS,
 
 	/*
-	 * Supports detaching of the default USB driver with
-	 * libusb_detach_kernel_driver().
+	 * Supports detaching and attaching of the default USB driver with
+	 * libusb_detach_kernel_driver() and libusb_attach_kernel_driver().
 	 */
 	LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER,
 };
diff --git a/lib/libusb/libusb.3 b/lib/libusb/libusb.3
--- a/lib/libusb/libusb.3
+++ b/lib/libusb/libusb.3
@@ -95,8 +95,10 @@
 can access HID devices without requiring user intervention.
 .It Va LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER
 .Nm
-supports detaching of the default USB driver with
-.Fn libusb_detach_kernel_driver .
+supports detaching and attaching of the default USB driver with
+.Fn libusb_detach_kernel_driver
+and
+.Fn libusb_attach_kernel_driver .
 .El
 .Pp
 .Ft const char *
@@ -869,6 +871,7 @@
 .Fn usb_check_connected
 .Fn usb_get_driver_np
 .Fn usb_detach_kernel_driver_np
+.Fn usb_attach_kernel_driver_np
 .Sh SEE ALSO
 .Xr libusb20 3 ,
 .Xr usb 4 ,
diff --git a/lib/libusb/libusb01.c b/lib/libusb/libusb01.c
--- a/lib/libusb/libusb01.c
+++ b/lib/libusb/libusb01.c
@@ -1023,3 +1023,21 @@
 
 	return (0);
 }
+
+int
+usb_attach_kernel_driver_np(usb_dev_handle *dev, int interface)
+{
+	struct libusb20_device *pdev;
+	int err;
+
+	pdev = (void *)dev;
+
+	if (pdev == NULL)
+		return (-1);
+
+	err = libusb20_dev_attach_kernel_driver(pdev, interface);
+	if (err != 0)
+		return (-1);
+
+	return (0);
+}
diff --git a/lib/libusb/libusb10.c b/lib/libusb/libusb10.c
--- a/lib/libusb/libusb10.c
+++ b/lib/libusb/libusb10.c
@@ -1052,10 +1052,14 @@
 int
 libusb_attach_kernel_driver(struct libusb20_device *pdev, int interface)
 {
+	int err;
+
 	if (pdev == NULL)
 		return (LIBUSB_ERROR_INVALID_PARAM);
-	/* stub - currently not supported by libusb20 */
-	return (0);
+
+	err = libusb20_dev_attach_kernel_driver(pdev, interface);
+
+	return (err ? LIBUSB_ERROR_OTHER : 0);
 }
 
 int
diff --git a/lib/libusb/libusb20.h b/lib/libusb/libusb20.h
--- a/lib/libusb/libusb20.h
+++ b/lib/libusb/libusb20.h
@@ -246,6 +246,8 @@
 const char *libusb20_dev_get_desc(struct libusb20_device *pdev);
 int	libusb20_dev_close(struct libusb20_device *pdev);
 int	libusb20_dev_detach_kernel_driver(struct libusb20_device *pdev, uint8_t iface_index);
+int	libusb20_dev_attach_kernel_driver(struct libusb20_device *pdev,
+    uint8_t iface_index);
 int	libusb20_dev_set_config_index(struct libusb20_device *pdev, uint8_t configIndex);
 int	libusb20_dev_get_debug(struct libusb20_device *pdev);
 int	libusb20_dev_get_fd(struct libusb20_device *pdev);
diff --git a/lib/libusb/libusb20.3 b/lib/libusb/libusb20.3
--- a/lib/libusb/libusb20.3
+++ b/lib/libusb/libusb20.3
@@ -126,6 +126,8 @@
 .Ft int
 .Fn libusb20_dev_detach_kernel_driver "struct libusb20_device *pdev" "uint8_t iface_index"
 .Ft int
+.Fn libusb20_dev_attach_kernel_driver "struct libusb20_device *pdev" "uint8_t iface_index"
+.Ft int
 .Fn libusb20_dev_set_config_index "struct libusb20_device *pdev" "uint8_t configIndex"
 .Ft int
 .Fn libusb20_dev_get_debug "struct libusb20_device *pdev"
@@ -623,6 +625,15 @@
 .
 .Pp
 .
+.Fn libusb20_dev_attach_kernel_driver
+will try to attach the kernel driver for the USB interface given by
+.Fa iface_index .
+.
+This function returns zero on success else a LIBUSB20_ERROR value is
+returned.
+.
+.Pp
+.
 .Fn libusb20_dev_set_config_index
 will try to set the configuration index on an USB
 device.
diff --git a/lib/libusb/libusb20.c b/lib/libusb/libusb20.c
--- a/lib/libusb/libusb20.c
+++ b/lib/libusb/libusb20.c
@@ -80,6 +80,7 @@
 #define	dummy_get_stats (void *)dummy_int
 #define	dummy_kernel_driver_active (void *)dummy_int
 #define	dummy_detach_kernel_driver (void *)dummy_int
+#define	dummy_attach_kernel_driver (void *)dummy_int
 #define	dummy_do_request_sync (void *)dummy_int
 #define	dummy_tr_open (void *)dummy_int
 #define	dummy_tr_close (void *)dummy_int
@@ -636,6 +637,16 @@
 	return (error);
 }
 
+int
+libusb20_dev_attach_kernel_driver(struct libusb20_device *pdev,
+    uint8_t ifaceIndex)
+{
+	int error;
+
+	error = pdev->methods->attach_kernel_driver(pdev, ifaceIndex);
+	return (error);
+}
+
 struct LIBUSB20_DEVICE_DESC_DECODED *
 libusb20_dev_get_device_desc(struct libusb20_device *pdev)
 {
diff --git a/lib/libusb/libusb20_int.h b/lib/libusb/libusb20_int.h
--- a/lib/libusb/libusb20_int.h
+++ b/lib/libusb/libusb20_int.h
@@ -92,6 +92,7 @@
 
 /* USB device specific */
 typedef int (libusb20_detach_kernel_driver_t)(struct libusb20_device *pdev, uint8_t iface_index);
+typedef int (libusb20_attach_kernel_driver_t)(struct libusb20_device *pdev, uint8_t iface_index);
 typedef int (libusb20_do_request_sync_t)(struct libusb20_device *pdev, struct LIBUSB20_CONTROL_SETUP_DECODED *setup, void *data, uint16_t *pactlen, uint32_t timeout, uint8_t flags);
 typedef int (libusb20_get_config_desc_full_t)(struct libusb20_device *pdev, uint8_t **ppbuf, uint16_t *plen, uint8_t index);
 typedef int (libusb20_get_config_index_t)(struct libusb20_device *pdev, uint8_t *pindex);
@@ -116,6 +117,7 @@
 
 #define	LIBUSB20_DEVICE(m,n) \
   m(n, detach_kernel_driver) \
+  m(n, attach_kernel_driver) \
   m(n, do_request_sync) \
   m(n, get_config_desc_full) \
   m(n, get_config_index) \
diff --git a/lib/libusb/libusb20_ugen20.c b/lib/libusb/libusb20_ugen20.c
--- a/lib/libusb/libusb20_ugen20.c
+++ b/lib/libusb/libusb20_ugen20.c
@@ -82,6 +82,7 @@
 static libusb20_get_stats_t ugen20_get_stats;
 static libusb20_kernel_driver_active_t ugen20_kernel_driver_active;
 static libusb20_detach_kernel_driver_t ugen20_detach_kernel_driver;
+static libusb20_attach_kernel_driver_t ugen20_attach_kernel_driver;
 static libusb20_do_request_sync_t ugen20_do_request_sync;
 static libusb20_process_t ugen20_process;
 
@@ -716,6 +717,17 @@
 	return (0);			/* kernel driver is detached */
 }
 
+static int
+ugen20_attach_kernel_driver(struct libusb20_device *pdev, uint8_t iface_index)
+{
+	int temp = iface_index;
+
+	if (ioctl(pdev->file_ctrl, IOUSB(USB_IFACE_DRIVER_ATTACH), &temp)) {
+		return (LIBUSB20_ERROR_OTHER);
+	}
+	return (0);			/* kernel driver is attached */
+}
+
 static int
 ugen20_do_request_sync(struct libusb20_device *pdev,
     struct LIBUSB20_CONTROL_SETUP_DECODED *setup,
diff --git a/lib/libusb/usb.h b/lib/libusb/usb.h
--- a/lib/libusb/usb.h
+++ b/lib/libusb/usb.h
@@ -303,6 +303,7 @@
 struct usb_bus *usb_get_busses(void);
 int	usb_get_driver_np(usb_dev_handle * dev, int interface, char *name, int namelen);
 int	usb_detach_kernel_driver_np(usb_dev_handle * dev, int interface);
+int	usb_attach_kernel_driver_np(usb_dev_handle *dev, int interface);
 
 #if 0
 {					/* style */
diff --git a/sys/dev/usb/usb_generic.c b/sys/dev/usb/usb_generic.c
--- a/sys/dev/usb/usb_generic.c
+++ b/sys/dev/usb/usb_generic.c
@@ -2376,6 +2376,28 @@
 		 */
 		usbd_set_parent_iface(f->udev, n, n);
 		break;
+	case USB_IFACE_DRIVER_ATTACH:
+
+		error = priv_check(curthread, PRIV_DRIVER);
+
+		if (error)
+			break;
+
+		n = *u.pint & 0xFF;
+
+		if (n == USB_IFACE_INDEX_ANY) {
+			error = EINVAL;
+			break;
+		}
+
+		/*
+		 * Attach the currently detached driver.
+		 */
+		usbd_set_parent_iface(f->udev, n, USB_IFACE_INDEX_ANY);
+
+		usb_probe_and_attach(f->udev, n);
+
+		break;
 
 	case USB_SET_POWER_MODE:
 		error = ugen_set_power_mode(f, *u.pint);
diff --git a/sys/dev/usb/usb_ioctl.h b/sys/dev/usb/usb_ioctl.h
--- a/sys/dev/usb/usb_ioctl.h
+++ b/sys/dev/usb/usb_ioctl.h
@@ -273,7 +273,8 @@
 #define	USB_IFACE_DRIVER_DETACH	_IOW ('U', 125, int)
 #define	USB_GET_PLUGTIME	_IOR ('U', 126, uint32_t)
 #define	USB_READ_DIR		_IOW ('U', 127, struct usb_read_dir)
-/* 128 - 133 unused */
+#define	USB_IFACE_DRIVER_ATTACH	_IOW('U', 128, int)
+/* 129 - 133 unused */
 #define	USB_GET_DEV_PORT_PATH	_IOR ('U', 134, struct usb_device_port_path)
 #define	USB_GET_POWER_USAGE	_IOR ('U', 135, int)
 #define	USB_SET_TX_FORCE_SHORT	_IOW ('U', 136, int)
diff --git a/usr.sbin/usbconfig/usbconfig.8 b/usr.sbin/usbconfig/usbconfig.8
--- a/usr.sbin/usbconfig/usbconfig.8
+++ b/usr.sbin/usbconfig/usbconfig.8
@@ -159,6 +159,11 @@
 This command uses the
 .Fl i Ar interface_index
 option.
+.It Cm attach_kernel_driver
+Attach kernel driver for the selected interface and USB device.
+This command uses the
+.Fl i Ar interface_index
+option.
 .It Cm suspend
 Force the device to suspend.
 .It Cm resume
diff --git a/usr.sbin/usbconfig/usbconfig.c b/usr.sbin/usbconfig/usbconfig.c
--- a/usr.sbin/usbconfig/usbconfig.c
+++ b/usr.sbin/usbconfig/usbconfig.c
@@ -93,6 +93,7 @@
 	uint8_t	got_do_request:1;
 	uint8_t	got_detach_kernel_driver:1;
 	uint8_t opt_dump_in_list_mode:1;
+	uint8_t	got_attach_kernel_driver:1;
 };
 
 struct token {
@@ -129,6 +130,7 @@
 	T_RESET,
 	T_LIST,
 	T_DO_REQUEST,
+	T_ATTACH_KERNEL_DRIVER,
 };
 
 static struct options options;
@@ -143,6 +145,7 @@
 	{"add_quirk", T_ADD_QUIRK, 1},
 	{"remove_quirk", T_REMOVE_QUIRK, 1},
 	{"detach_kernel_driver", T_DETACH_KERNEL_DRIVER, 0},
+	{"attach_kernel_driver", T_ATTACH_KERNEL_DRIVER, 0},
 	{"dump_quirk_names", T_DUMP_QUIRK_NAMES, 0},
 	{"dump_device_quirks", T_DUMP_DEVICE_QUIRKS, 0},
 	{"dump_all_desc", T_DUMP_ALL_DESC, 0},
@@ -283,6 +286,7 @@
 	    "  add_quirk <quirk>" "\n"
 	    "  remove_quirk <quirk>" "\n"
 	    "  detach_kernel_driver" "\n"
+	    "  attach_kernel_driver" "\n"
 	    "  dump_quirk_names" "\n"
 	    "  dump_device_quirks" "\n"
 	    "  dump_all_desc" "\n"
@@ -496,6 +500,11 @@
 				err(1, "could not detach kernel driver");
 			}
 		}
+		if (opt->got_attach_kernel_driver) {
+			if (libusb20_dev_attach_kernel_driver(pdev, opt->iface)) {
+				err(1, "could not attach kernel driver");
+			}
+		}
 		dump_any =
 		    (opt->got_dump_all_desc ||
 		    opt->got_dump_device_desc ||
@@ -688,6 +697,13 @@
 			opt->got_any++;
 			break;
 
+		case T_ATTACH_KERNEL_DRIVER:
+			if (opt->got_attach_kernel_driver)
+				duplicate_option(argv[n]);
+			opt->got_attach_kernel_driver = 1;
+			opt->got_any++;
+			break;
+
 		case T_DUMP_QUIRK_NAMES:
 			if (opt->got_dump_quirk_names)
 				duplicate_option(argv[n]);