greybus: initial framework for ES1 usb AP driver

drivers/staging/greybus/Makefile

 greybus-y := core.o gbuf.o i2c-gb.o gpio-gb.o sdio-gb.o uart-gb.o
 
 obj-m += greybus.o
+obj-m += es1-ap-usb.o
 
 KERNELVER		?= $(shell uname -r)
 KERNELDIR 		?= /lib/modules/$(KERNELVER)/build

drivers/staging/greybus/es1-ap-usb.c

+/*
+ * Greybus "AP" USB driver
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/usb.h>
+
+
+static const struct usb_device_id id_table[] = {
+	{ USB_DEVICE(0x0000, 0x0000) },		// FIXME
+	{ },
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+
+static int ap_probe(struct usb_interface *interface,
+		    const struct usb_device_id *id)
+{
+
+	return 0;
+}
+
+static void ap_disconnect(struct usb_interface *interface)
+{
+
+
+}
+
+static struct usb_driver es1_ap_driver = {
+	.name =		"es1_ap_driver",
+	.probe =	ap_probe,
+	.disconnect =	ap_disconnect,
+	.id_table =	id_table,
+};
+
+module_usb_driver(es1_ap_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");