From: Seung-Woo Kim <sw0312.kim@samsung.com>
Date: Mon, 9 Apr 2018 06:57:15 +0000 (+0900)
Subject: usb: gadget: slp: fix to use serial-number if arm64 has no dmi serial
X-Git-Tag: accepted/tizen/unified/20190130.053716~42
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6ff6a27ed4e41ef1f258cc2c2f632fa378b19de2;p=profile%2Fcommon%2Fplatform%2Fkernel%2Flinux-artik7.git

usb: gadget: slp: fix to use serial-number if arm64 has no dmi serial

The arm64 artik710 board has no dmi serial. Fix to use serial-number
of devicetree which is attached from artik u-boot.

If there is the devicetree node, it is found from sysfs path,
/sys/firmware/devicetree/base/serial-number.

Change-Id: I78263c2fee2c15ce11cc3d72e1588eb941042e99
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
---

diff --git a/drivers/usb/gadget/legacy/slp.c b/drivers/usb/gadget/legacy/slp.c
index 1eeca11..19a639b 100644
--- a/drivers/usb/gadget/legacy/slp.c
+++ b/drivers/usb/gadget/legacy/slp.c
@@ -1201,15 +1201,27 @@ static int slp_multi_bind(struct usb_composite_dev *cdev)
 	strncpy(product_string, "TIZEN", sizeof(product_string) - 1);
 
 	serial = dmi_get_system_info(DMI_PRODUCT_SERIAL);
-	if (serial)
+	if (serial) {
 		snprintf(serial_string, 18, "%s", serial);
-	else
+	} else {
 #ifdef CONFIG_ARM
 		snprintf(serial_string, 18, "%s",
 			 system_serial);
 #else
-		snprintf(serial_string, 18, "%s", "01234TEST");
+		struct device_node *root;
+		const char *serial_number = NULL;
+
+		root = of_find_node_by_path("/");
+		if (root)
+			of_property_read_string(root, "serial-number",
+						&serial_number);
+
+		if (serial_number)
+			snprintf(serial_string, 18, "%s", serial_number);
+		else
+			snprintf(serial_string, 18, "%s", "01234TEST");
 #endif
+	}
 
 	id = usb_string_id(cdev);
 	if (id < 0)