[PATCH v4 05/13] usb: hcd.h: Add OTG to HCD interface

[Roger Quadros <rogerq@ti.com>]

The OTG core will use struct otg_hcd_ops to
add/remove the HCD controller.

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

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Peter Chen <peter.chen@freescale.com>
---
 include/linux/usb/hcd.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index d2784c1..27d78b1 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -386,6 +386,20 @@ struct hc_driver {
 
 };
 
+/**
+ * struct otg_hcd_ops - Interface between OTG core and HCD
+ *
+ * Provided by the HCD core to allow the OTG core to start/stop the HCD
+ *
+ * @add: function to add the HCD
+ * @remove: function to remove the HCD
+ */
+struct otg_hcd_ops {
+	int (*add)(struct usb_hcd *hcd,
+		   unsigned int irqnum, unsigned long irqflags);
+	void (*remove)(struct usb_hcd *hcd);
+};
+
 static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd)
 {
 	return hcd->driver->flags & HCD_BH;
-- 
2.1.4