greybus: add test_sink driver

drivers/staging/greybus/Makefile

@@ -11,6 +11,7 @@ greybus-y :=	core.o		\
 
 obj-m += greybus.o
 obj-m += es1-ap-usb.o
+obj-m += test_sink.o
 
 KERNELVER		?= $(shell uname -r)
 KERNELDIR 		?= /lib/modules/$(KERNELVER)/build

drivers/staging/greybus/test_sink.c

+/*
+ * Test "sink" Greybus driver.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include "greybus.h"
+
+struct test_device {
+	struct greybus_device *gdev;
+};
+
+int gb_register_cport_complete(struct greybus_device *gdev,
+			       gbuf_complete_t handler, int cport,
+			       void *context);
+void gb_deregister_cport_complete(int cport);
+
+
+
+static int test_init(void)
+{
+	return 0;
+}
+
+static void test_exit(void)
+{
+}
+
+module_init(test_init);
+module_exit(test_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");