From 291f3b9e61eb4d4f3cc43f93b8862fbe74c588ae Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <greg@kroah.com>
Date: Mon, 1 Sep 2014 18:41:39 -0700
Subject: [PATCH] greybus: serial number attribute added

---
 drivers/staging/greybus/core.c | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/greybus/core.c b/drivers/staging/greybus/core.c
index c05495bc34b0..68fb2a5fe187 100644
--- a/drivers/staging/greybus/core.c
+++ b/drivers/staging/greybus/core.c
@@ -169,7 +169,6 @@ static void greybus_module_release(struct device *dev)
 }
 
 
-
 static struct device_type greybus_module_type = {
 	.name =		"greybus_module",
 	.release =	greybus_module_release,
@@ -222,8 +221,40 @@ static struct attribute_group function_addr_grp = {
 	.is_visible =	function_attrs_are_visible,
 };
 
+#if 0
+struct greybus_descriptor_module_id {
+	__le16	vendor;
+	__le16	product;
+	__le16	version;
+	__u8	vendor_stringid;
+	__u8	product_stringid;
+};
+#endif
+
+/* Serial Number */
+static ssize_t serial_number_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct greybus_device *gdev = to_greybus_device(dev);
+	return sprintf(buf, "%llX\n",
+		      (unsigned long long)gdev->serial_number.serial_number);
+}
+static DEVICE_ATTR_RO(serial_number);
+
+static struct attribute *serial_number_attrs[] = {
+	&dev_attr_serial_number.attr,
+	NULL,
+};
+
+static struct attribute_group serial_number_grp = {
+	.attrs =	serial_number_attrs,
+	.is_visible =	function_attrs_are_visible,
+};
+
+
 static const struct attribute_group *greybus_module_groups[] = {
 	&function_addr_grp,
+	&serial_number_grp,
 	NULL,
 };