[PATCH] USB Gadget: add "gadget_chips.h"

This adds standard gadget_is_*() calls.  Gadget drivers using
those calls can get rid of some inlined #ifdefs, and will also
be able to do more "late binding" to their hardware.


Define gadget_is_*() calls, to help do late binding to USB controllers.

Current gadget drivers expect to know at compile time what hardware
they'll bind to.  That's not very friendly to a generic PDA distro,
which might prefer to defer such choices to run time.

These macros let drivers change that code from inlined #ifdefs (ugh) to
normal C statements (looks much nicer), so making those "what hardware"
policy choices at run time gets easier.

drivers/usb/gadget/gadget_chips.h

+/*
+ * USB device controllers have lots of quirks.  Use these macros in
+ * gadget drivers or other code that needs to deal with them, and which
+ * autoconfigures instead of using early binding to the hardware.
+ *
+ * This could eventually work like the ARM mach_is_*() stuff, driven by
+ * some config file that gets updated as new hardware is supported.
+ *
+ * NOTE:  some of these controller drivers may not be available yet.
+ */
+#ifdef CONFIG_USB_GADGET_NET2280
+#define	gadget_is_net2280(g)	!strcmp("net2280", (g)->name)
+#else
+#define	gadget_is_net2280(g)	0
+#endif
+
+#ifdef CONFIG_USB_GADGET_PXA
+#define	gadget_is_pxa(g)	!strcmp("pxa2xx_udc", (g)->name)
+#else
+#define	gadget_is_pxa(g)	0
+#endif
+
+#ifdef CONFIG_USB_GADGET_GOKU
+#define	gadget_is_goku(g)	!strcmp("goku_udc", (g)->name)
+#else
+#define	gadget_is_goku(g)	0
+#endif
+
+#ifdef CONFIG_USB_GADGET_SUPERH
+#define	gadget_is_sh(g)		!strcmp("sh_udc", (g)->name)
+#else
+#define	gadget_is_sh(g)		0
+#endif
+
+#ifdef CONFIG_USB_GADGET_SA1100
+#define	gadget_is_sa1100(g)	!strcmp("sa1100_udc", (g)->name)
+#else
+#define	gadget_is_sa1100(g)	0
+#endif
+
+#ifdef CONFIG_USB_GADGET_MQ11XX
+#define	gadget_is_mq11xx(g)	!strcmp("mq11xx_udc", (g)->name)
+#else
+#define	gadget_is_mq11xx(g)	0
+#endif
+
+#ifdef CONFIG_USB_GADGET_OMAP
+#define	gadget_is_omap(g)	!strcmp("omap_udc", (g)->name)
+#else
+#define	gadget_is_omap(g)	0
+#endif
+
+// CONFIG_USB_GADGET_AT91RM9200
+// CONFIG_USB_GADGET_SX2
+// CONFIG_USB_GADGET_AU1X00
+// ...
+