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Diffstat (limited to 'include/linux/usb/composite.h')
-rw-r--r--include/linux/usb/composite.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index c932390c6da..935c380ffe4 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -130,6 +130,9 @@ struct usb_function {
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 *);
/**
@@ -316,9 +319,13 @@ struct usb_composite_dev {
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);