diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 8509e95..49459e3 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -2181,6 +2181,7 @@
 	u8			cdc = 1, zlp = 1, rndis = 1;
 	struct usb_ep		*in_ep, *out_ep, *status_ep = NULL;
 	int			status = -ENOMEM;
+	int			gcnum;
 
 	/* these flags are only ever cleared; compiler take note */
 #ifndef	DEV_CONFIG_CDC
@@ -2194,44 +2195,26 @@
 	 * standard protocol is _strongly_ preferred for interop purposes.
 	 * (By everyone except Microsoft.)
 	 */
-	if (gadget_is_net2280 (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201);
-	} else if (gadget_is_dummy (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0202);
-	} else if (gadget_is_pxa (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203);
+	if (gadget_is_pxa (gadget)) {
 		/* pxa doesn't support altsettings */
 		cdc = 0;
 	} else if (gadget_is_sh(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204);
 		/* sh doesn't support multiple interfaces or configs */
 		cdc = 0;
 		rndis = 0;
 	} else if (gadget_is_sa1100 (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205);
 		/* hardware can't write zlps */
 		zlp = 0;
 		/* sa1100 CAN do CDC, without status endpoint ... we use
 		 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth".
 		 */
 		cdc = 0;
-	} else if (gadget_is_goku (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206);
-	} else if (gadget_is_mq11xx (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207);
-	} else if (gadget_is_omap (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208);
-	} else if (gadget_is_lh7a40x(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0209);
-	} else if (gadget_is_n9604(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
-	} else if (gadget_is_pxa27x(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
-	} else if (gadget_is_s3c2410(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
-	} else if (gadget_is_at91(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
-	} else {
+	}
+
+	gcnum = usb_gadget_controller_number (gadget);
+	if (gcnum >= 0)
+		device_desc.bcdDevice = cpu_to_le16 (0x0200 + gcnum);
+	else {
 		/* can't assume CDC works.  don't want to default to
 		 * anything less functional on CDC-capable hardware,
 		 * so we fail in this case.
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 4f57085..a41d9d4 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -3713,6 +3713,7 @@
 static int __init check_parameters(struct fsg_dev *fsg)
 {
 	int	prot;
+	int	gcnum;
 
 	/* Store the default values */
 	mod_data.transport_type = USB_PR_BULK;
@@ -3724,33 +3725,13 @@
 		mod_data.can_stall = 0;
 
 	if (mod_data.release == 0xffff) {	// Parameter wasn't set
-		if (gadget_is_net2280(fsg->gadget))
-			mod_data.release = 0x0301;
-		else if (gadget_is_dummy(fsg->gadget))
-			mod_data.release = 0x0302;
-		else if (gadget_is_pxa(fsg->gadget))
-			mod_data.release = 0x0303;
-		else if (gadget_is_sh(fsg->gadget))
-			mod_data.release = 0x0304;
-
 		/* The sa1100 controller is not supported */
-
-		else if (gadget_is_goku(fsg->gadget))
-			mod_data.release = 0x0306;
-		else if (gadget_is_mq11xx(fsg->gadget))
-			mod_data.release = 0x0307;
-		else if (gadget_is_omap(fsg->gadget))
-			mod_data.release = 0x0308;
-		else if (gadget_is_lh7a40x(fsg->gadget))
-			mod_data.release = 0x0309;
-		else if (gadget_is_n9604(fsg->gadget))
-			mod_data.release = 0x0310;
-		else if (gadget_is_pxa27x(fsg->gadget))
-			mod_data.release = 0x0311;
-		else if (gadget_is_s3c2410(gadget))
-			mod_data.release = 0x0312;
-		else if (gadget_is_at91(fsg->gadget))
-			mod_data.release = 0x0313;
+		if (gadget_is_sa1100(fsg->gadget))
+			gcnum = -1;
+		else
+			gcnum = usb_gadget_controller_number(fsg->gadget);
+		if (gcnum >= 0)
+			mod_data.release = 0x0300 + gcnum;
 		else {
 			WARN(fsg, "controller '%s' not recognized\n",
 				fsg->gadget->name);
diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
index ea2eb52..8cbae21 100644
--- a/drivers/usb/gadget/gadget_chips.h
+++ b/drivers/usb/gadget/gadget_chips.h
@@ -5,6 +5,7 @@
  *
  * This could eventually work like the ARM mach_is_*() stuff, driven by
  * some config file that gets updated as new hardware is supported.
+ * (And avoiding the runtime comparisons in typical one-choice cases.)
  *
  * NOTE:  some of these controller drivers may not be available yet.
  */
@@ -86,7 +87,61 @@
 #define gadget_is_at91(g)	0
 #endif
 
+#ifdef CONFIG_USB_GADGET_IMX
+#define gadget_is_imx(g)	!strcmp("imx_udc", (g)->name)
+#else
+#define gadget_is_imx(g)	0
+#endif
+
 // CONFIG_USB_GADGET_SX2
 // CONFIG_USB_GADGET_AU1X00
 // ...
 
+
+/**
+ * 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;
+	return -ENOENT;
+}
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index 9e4f1c6..c925d92 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -1422,49 +1422,20 @@
 	int ret;
 	struct usb_ep *ep;
 	struct gs_dev *dev;
+	int gcnum;
 
-	/* device specific */
-	if (gadget_is_net2280(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0001);
-	} else if (gadget_is_pxa(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0002);
-	} else if (gadget_is_sh(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0003);
-		/* sh doesn't support multiple interfaces or configs */
+	/* Some controllers can't support CDC ACM:
+	 * - sh doesn't support multiple interfaces or configs;
+	 * - sa1100 doesn't have a third interrupt endpoint
+	 */
+	if (gadget_is_sh(gadget) || gadget_is_sa1100(gadget))
 		use_acm = 0;
-	} else if (gadget_is_sa1100(gadget)) {
+
+	gcnum = usb_gadget_controller_number(gadget);
+	if (gcnum >= 0)
 		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0004);
-		/* sa1100 doesn't support necessary endpoints */
-		use_acm = 0;
-	} else if (gadget_is_goku(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0005);
-	} else if (gadget_is_mq11xx(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0006);
-	} else if (gadget_is_omap(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0007);
-	} else if (gadget_is_lh7a40x(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0008);
-	} else if (gadget_is_n9604(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0009);
-	} else if (gadget_is_pxa27x(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0011);
-	} else if (gadget_is_s3c2410(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0012);
-	} else if (gadget_is_at91(gadget)) {
-		gs_device_desc.bcdDevice =
-			__constant_cpu_to_le16(GS_VERSION_NUM|0x0013);
-	} else {
+				cpu_to_le16(GS_VERSION_NUM | gcnum);
+	else {
 		printk(KERN_WARNING "gs_bind: controller '%s' not recognized\n",
 			gadget->name);
 		/* unrecognized, but safe unless bulk is REALLY quirky */
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index bb9b2d9..6890e77 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -1139,6 +1139,13 @@
 {
 	struct zero_dev		*dev;
 	struct usb_ep		*ep;
+	int			gcnum;
+
+	/* FIXME this can't yet work right with SH ... it has only
+	 * one configuration, numbered one.
+	 */
+	if (gadget_is_sh(gadget))
+		return -ENODEV;
 
 	/* Bulk-only drivers like this one SHOULD be able to
 	 * autoconfigure on any sane usb controller driver,
@@ -1161,43 +1168,10 @@
 	EP_OUT_NAME = ep->name;
 	ep->driver_data = ep;	/* claim */
 
-
-	/*
-	 * DRIVER POLICY CHOICE:  you may want to do this differently.
-	 * One thing to avoid is reusing a bcdDevice revision code
-	 * with different host-visible configurations or behavior
-	 * restrictions -- using ep1in/ep2out vs ep1out/ep3in, etc
-	 */
-	if (gadget_is_net2280 (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201);
-	} else if (gadget_is_pxa (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203);
-#if 0
-	} else if (gadget_is_sh(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204);
-		/* SH has only one configuration; see "loopdefault" */
-		device_desc.bNumConfigurations = 1;
-		/* FIXME make 1 == default.bConfigurationValue */
-#endif
-	} else if (gadget_is_sa1100 (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205);
-	} else if (gadget_is_goku (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206);
-	} else if (gadget_is_mq11xx (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207);
-	} else if (gadget_is_omap (gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208);
-	} else if (gadget_is_lh7a40x(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0209);
-	} else if (gadget_is_n9604(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
-	} else if (gadget_is_pxa27x(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
-	} else if (gadget_is_s3c2410(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
-	} else if (gadget_is_at91(gadget)) {
-		device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
-	} else {
+	gcnum = usb_gadget_controller_number (gadget);
+	if (gcnum >= 0)
+		device_desc.bcdDevice = cpu_to_le16 (0x0200 + gcnum);
+	else {
 		/* gadget zero is so simple (for now, no altsettings) that
 		 * it SHOULD NOT have problems with bulk-capable hardware.
 		 * so warn about unrcognized controllers, don't panic.