Adding reset API for UDC bus reset handler is useful for below
two issues.
Current disconnect API at usb_gadget_driver is also invoked at
udc's bus reset handler, but the document says it is invoked when
the host is disconnected.
Besides, we may expect the gadget_driver to do different things
for host sends bus reset and host disconnects gadget, eg, we don't
want to pull down dp after bus reset, but we may want it after
disconnection.
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
include/linux/usb/gadget.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index c3a6185..0516ac5 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -816,6 +816,7 @@ static inline int usb_gadget_disconnect(struct usb_gadget *gadget)
* Called in a context that permits sleeping.
* @suspend: Invoked on USB suspend. May be called in_interrupt.
* @resume: Invoked on USB resume. May be called in_interrupt.
+ * @reset: Invoked on USB bus reset. Should be called in_interrupt.
* @driver: Driver model state for this driver.
*
* Devices are disabled till a gadget driver successfully bind()s, which
@@ -873,6 +874,7 @@ struct usb_gadget_driver {
void (*disconnect)(struct usb_gadget *);
void (*suspend)(struct usb_gadget *);
void (*resume)(struct usb_gadget *);
+ void (*reset)(struct usb_gadget *);
/* FIXME support safe rmmod */
struct device_driver driver;
--
1.7.9.5
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