[PATCH v10 06/14] usb: gadget.h: Add OTG to gadget interface

[Roger Quadros <rogerq@ti.com>]

The OTG core will use struct otg_gadget_ops to
start/stop the gadget controller.

The main purpose of this interface is to avoid directly
calling usb_gadget_start/stop() from the OTG core as they
wouldn't be defined in the built-in symbol table if
CONFIG_USB_GADGET is m.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 include/linux/usb/gadget.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 2dd9e6b..f4fc0aa 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -639,6 +639,22 @@ struct usb_gadget_driver {
 };
 
 
+/*-------------------------------------------------------------------------*/
+
+/**
+ * struct otg_gadget_ops - Interface between OTG core and gadget
+ *
+ * Provided by the gadget core to allow the OTG core to start/stop the gadget
+ *
+ * @start: function to start the gadget
+ * @stop: function to stop the gadget
+ * @connect_control: function to connect/disconnect from the bus
+ */
+struct otg_gadget_ops {
+	int (*start)(struct usb_gadget *gadget);
+	int (*stop)(struct usb_gadget *gadget);
+	int (*connect_control)(struct usb_gadget *gadget, bool connect);
+};
 
 /*-------------------------------------------------------------------------*/
 
-- 
2.7.4