From b47f9249d7cb6c337d6860bd30e5db03477a5f2b Mon Sep 17 00:00:00 2001
From: Florian Pose <fp@igh.de>
Date: Tue, 24 Aug 2021 13:27:28 +0200
Subject: [PATCH] Documentation for interface names.

---
 script/ethercat.conf | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/script/ethercat.conf b/script/ethercat.conf
index 91ccaeb8..f6f0a549 100644
--- a/script/ethercat.conf
+++ b/script/ethercat.conf
@@ -17,6 +17,10 @@
 # Specify the MAC address (hexadecimal with colons) of the Ethernet device to
 # use. Example: "00:00:08:44:ab:66"
 #
+# Alternatively, a network interface name can be specified. The interface
+# name will be resolved to a MAC address using the 'ip' command.
+# Example: "eth0"
+#
 # The broadcast address "ff:ff:ff:ff:ff:ff" has a special meaning: It tells
 # the master to accept the first device offered by any Ethernet driver.
 #
@@ -24,6 +28,10 @@
 # created: A non-empty variable MASTER0_DEVICE will create one master, adding a
 # non-empty variable MASTER1_DEVICE will create a second master, and so on.
 #
+# Examples:
+# MASTER0_DEVICE="00:00:08:44:ab:66"
+# MASTER0_DEVICE="eth0"
+#
 MASTER0_DEVICE=""
 #MASTER1_DEVICE=""