From dc7654cbc6cd18bd202a3fa52c2afef3fbc11b45 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Tue, 9 Jun 2020 20:06:40 +0200
Subject: wwan: T2529: add XML device constraint

---
 interface-definitions/interfaces-wirelessmodem.xml.in | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/interface-definitions/interfaces-wirelessmodem.xml.in b/interface-definitions/interfaces-wirelessmodem.xml.in
index 6989dea1b..8b68594da 100644
--- a/interface-definitions/interfaces-wirelessmodem.xml.in
+++ b/interface-definitions/interfaces-wirelessmodem.xml.in
@@ -56,9 +56,12 @@
                 <description>TTY device name, regular serial port</description>
               </valueHelp>
               <valueHelp>
-                <format>usbXbY.YpZ.Z</format>
+                <format>usbNbXpY</format>
                 <description>TTY device name, USB based</description>
               </valueHelp>
+              <constraint>
+                <regex>^(ttyS[0-9]+|usb[0-9]+b.*)$</regex>
+              </constraint>
             </properties>
           </leafNode>
           #include <include/interface-disable-link-detect.xml.i>
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