USB: Composite framework: Add suspended sysfs entry

This patch adds a sysfs entry (/sys/devices/platform/_UDC_/gadget/suspended) to
show the suspend state of an USB composite gadget.

Signed-off-by: Fabien Chouteau <fabien.chouteau@barco.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 738ea1a691cb..139353efad34 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -326,6 +326,7 @@ struct usb_composite_dev {
 
         /* private: */
         /* internals */
+        unsigned int                    suspended:1;
         struct usb_device_descriptor    desc;
         struct list_head                configs;
         struct usb_composite_driver     *driver;
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index f4b7ca516cdd..db6141cdb77b 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -494,6 +494,10 @@ static inline void set_gadget_data(struct usb_gadget *gadget, void *data)
         { dev_set_drvdata(&gadget->dev, data); }
 static inline void *get_gadget_data(struct usb_gadget *gadget)
         { return dev_get_drvdata(&gadget->dev); }
+static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev)
+{
+        return container_of(dev, struct usb_gadget, dev);
+}
 
 /* iterates the non-control endpoints; 'tmp' is a struct usb_ep pointer */
 #define gadget_for_each_ep(tmp,gadget) \