1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 30fdab0ae383..16ee4714d38c 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -209,3 +209,42 @@ void usb_ep_autoconfig_reset (struct usb_gadget *gadget)
 	gadget->out_epnum = 0;
 }
 EXPORT_SYMBOL_GPL(usb_ep_autoconfig_reset);
+
+/**
+ * usb_ep_autoconfig_by_name - Used to pick the endpoint by name. eg ep1in-gsi
+ * @gadget: The device to which the endpoint must belong.
+ * @desc: Endpoint descriptor, with endpoint direction and transfer mode
+ *	initialized.
+ * @ep_name: EP name that is to be searched.
+ *
+ */
+struct usb_ep *usb_ep_autoconfig_by_name(
+			struct usb_gadget		*gadget,
+			struct usb_endpoint_descriptor	*desc,
+			const char			*ep_name
+)
+{
+	struct usb_ep	*ep;
+	bool ep_found = false;
+
+	list_for_each_entry(ep, &gadget->ep_list, ep_list)
+		if (0 == strcmp(ep->name, ep_name) &&
+				!ep->driver_data) {
+			ep_found = true;
+			break;
+		}
+
+	if (ep_found) {
+		desc->bEndpointAddress &= USB_DIR_IN;
+		desc->bEndpointAddress |= ep->ep_num;
+		ep->address = desc->bEndpointAddress;
+		pr_debug("Allocating ep address:%x\n", ep->address);
+		ep->desc = NULL;
+		ep->comp_desc = NULL;
+		return ep;
+	}
+
+	pr_err("%s:error finding ep %s\n", __func__, ep_name);
+	return NULL;
+}
+EXPORT_SYMBOL(usb_ep_autoconfig_by_name);