Add a function to notify the udc core, that a bus reset occured.
Signed-off-by: Steffen Trumtrar <s.trumt...@pengutronix.de>
---
drivers/usb/gadget/udc-core.c | 15 +++++++++++++++
include/usb/gadget.h | 4 ++++
2 files changed, 19 insertions(+)
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index e357456098ae..096f05ed48df 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -108,6 +108,21 @@ void usb_gadget_set_state(struct usb_gadget *gadget,
}
EXPORT_SYMBOL_GPL(usb_gadget_set_state);
+/**
+ * usb_gadget_udc_reset - notifies the udc core that bus reset occurs
+ * @gadget: The gadget which bus reset occurs
+ * @driver: The gadget driver we want to notify
+ *
+ * If the udc driver has bus reset handler, it needs to call this when the bus
+ * reset occurs, it notifies the gadget driver that the bus reset occurs as
+ * well as updates gadget state.
+ */
+void usb_gadget_udc_reset(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
+{
+ usb_gadget_set_state(gadget, USB_STATE_DEFAULT);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_udc_reset);
/* ------------------------------------------------------------------------- */
/**
diff --git a/include/usb/gadget.h b/include/usb/gadget.h
index 80418a9cd447..afa11b2d9d8a 100644
--- a/include/usb/gadget.h
+++ b/include/usb/gadget.h
@@ -1018,6 +1018,10 @@ extern void usb_gadget_set_state(struct usb_gadget
*gadget,
/*-------------------------------------------------------------------------*/
+/* utility to tell udc core that the bus reset occurs */
+extern void usb_gadget_udc_reset(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver);
+
/* utility wrapping a simple endpoint selection policy */
extern struct usb_ep *usb_ep_autoconfig(struct usb_gadget *,
--
2.23.0
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