drivers: usb: gadget: Add helper function for installing ACM gadget function.

Submitted on behalf of James Luan <James.Luan@motorola.com>

Signed-off-by: Joe Swantek <joseph.swantek@motorola.com>
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index bd6226c..39363bf 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -782,3 +782,12 @@
 		kfree(acm);
 	return status;
 }
+
+int __init acm_function_add(struct usb_composite_dev *cdev,
+	struct usb_configuration *c)
+{
+	int ret = acm_bind_config(c, 0);
+	if (ret == 0)
+		gserial_setup(c->cdev->gadget, 1);
+	return ret;
+}
diff --git a/drivers/usb/gadget/f_acm.h b/drivers/usb/gadget/f_acm.h
new file mode 100644
index 0000000..8e27b34
--- /dev/null
+++ b/drivers/usb/gadget/f_acm.h
@@ -0,0 +1,24 @@
+/*
+ * Gadget Driver for Android ACM
+ *
+ * Copyright (C) 2009 Motorola, Inc.
+ * Author:
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __F_ACM_H
+#define __F_ACM_H
+
+int acm_function_add(struct usb_composite_dev *cdev,
+	struct usb_configuration *c);
+
+#endif /* __F_ACM_H */