int usb_add_function(struct usb_configuration *, struct usb_function *);
+int usb_function_deactivate(struct usb_function *);
+int usb_function_activate(struct usb_function *);
+
int usb_interface_id(struct usb_configuration *, struct usb_function *);
/**
struct usb_composite_driver *driver;
u8 next_string_id;
- spinlock_t lock;
+ /* the gadget driver won't enable the data pullup
+ * while the deactivation count is nonzero.
+ */
+ unsigned deactivations;
- /* REVISIT use and existence of lock ... */
+ /* protects at least deactivation count */
+ spinlock_t lock;
};
extern int usb_string_id(struct usb_composite_dev *c);