[PATCH] USB: add support for AT91 gadget

This adds support for the USB peripheral controller on AT91
(rm9200, eventually also sam9261 or uClinux) platforms.

More SOC support for Linux-USB ... an uncomplicated pure PIO driver.
It'd be worth using this as a model, if you're starting a driver
for some other peripheral controller.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/Kconfig

@@ -187,6 +187,23 @@ config USB_OTG
 
 	   Select this only if your OMAP board has a Mini-AB connector.
 
+config USB_GADGET_AT91
+	boolean "AT91 USB Device Port"
+	depends on ARCH_AT91RM9200
+	select USB_GADGET_SELECTED
+	help
+	   Many Atmel AT91 processors (such as the AT91RM2000) have a
+	   full speed USB Device Port with support for five configurable
+	   endpoints (plus endpoint zero).
+
+	   Say "y" to link the driver statically, or "m" to build a
+	   dynamically linked module called "at91_udc" and force all
+	   gadget drivers to also be dynamically linked.
+
+config USB_AT91
+	tristate
+	depends on USB_GADGET_AT91
+	default USB_GADGET
 
 config USB_GADGET_DUMMY_HCD
 	boolean "Dummy HCD (DEVELOPMENT)"

drivers/usb/gadget/Makefile

@@ -7,6 +7,7 @@ obj-$(CONFIG_USB_PXA2XX)	+= pxa2xx_udc.o
 obj-$(CONFIG_USB_GOKU)		+= goku_udc.o
 obj-$(CONFIG_USB_OMAP)		+= omap_udc.o
 obj-$(CONFIG_USB_LH7A40X)	+= lh7a40x_udc.o
+obj-$(CONFIG_USB_AT91)		+= at91_udc.o
 
 #
 # USB gadget drivers