+
+/**
+ * usb_gadget_controller_number - support bcdDevice id convention
+ * @gadget: the controller being driven
+ *
+ * Return a 2-digit BCD value associated with the peripheral controller,
+ * suitable for use as part of a bcdDevice value, or a negative error code.
+ *
+ * NOTE: this convention is purely optional, and has no meaning in terms of
+ * any USB specification. If you want to use a different convention in your
+ * gadget driver firmware -- maybe a more formal revision ID -- feel free.
+ *
+ * Hosts see these bcdDevice numbers, and are allowed (but not encouraged!)
+ * to change their behavior accordingly. For example it might help avoiding
+ * some chip bug.
+ */
+static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
+{
+ if (gadget_is_net2280(gadget))
+ return 0x01;
+ else if (gadget_is_dummy(gadget))
+ return 0x02;
+ else if (gadget_is_pxa(gadget))
+ return 0x03;
+ else if (gadget_is_sh(gadget))
+ return 0x04;
+ else if (gadget_is_sa1100(gadget))
+ return 0x05;
+ else if (gadget_is_goku(gadget))
+ return 0x06;
+ else if (gadget_is_mq11xx(gadget))
+ return 0x07;
+ else if (gadget_is_omap(gadget))
+ return 0x08;
+ else if (gadget_is_lh7a40x(gadget))
+ return 0x09;
+ else if (gadget_is_n9604(gadget))
+ return 0x10;
+ else if (gadget_is_pxa27x(gadget))
+ return 0x11;
+ else if (gadget_is_s3c2410(gadget))
+ return 0x12;
+ else if (gadget_is_at91(gadget))
+ return 0x13;
+ else if (gadget_is_imx(gadget))
+ return 0x14;
+ else if (gadget_is_musbhsfc(gadget))
+ return 0x15;
+ else if (gadget_is_musbhdrc(gadget))
+ return 0x16;
+ else if (gadget_is_mpc8272(gadget))
+ return 0x17;
+ return -ENOENT;
+}