From c92b648bac996b34dc75a4fff15d7fb429bfe74b Mon Sep 17 00:00:00 2001
From: Frank Wunderlich <frank-w@public-files.de>
Date: Wed, 22 Sep 2021 16:30:34 +0200
Subject: [PATCH] arm: dts: add second gmac

use it with vlan-aware bridge

- create a bridge for use for wan

/etc/systemd/network/11-wanbr.netdev
[NetDev]
Name=wanbr
Kind=bridge

[Bridge]
DefaultPVID=0 # should be different to other vlan-aware bridges (like lanbr)
VLANFiltering=1

- map aux and wan to vlan-aware bridge
- traffic will be tagged inside with vlan-id 99

/etc/systemd/network/12-wan-bind.network
[Match]
Name=wan aux

[Link]
RequiredForOnline=no

[Network]
BindCarrier=eth0
Bridge=wanbr

[BridgeVLAN]
VLAN=99
PVID=99
EgressUntagged=99

- configure eth1 as wan

/etc/systemd/network/15-wan.network
[Match]
Name=eth1

[Network]
BindCarrier=eth0

Address=192.168.0.18/24
Gateway=192.168.0.10
DNS=192.168.0.10

IPForward=yes
---
 arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
index 5008115d2494e..47e484a6cdcf9 100644
--- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
+++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
@@ -186,6 +186,18 @@
 		};
 	};
 
+	gmac1: mac@1 {
+		compatible = "mediatek,eth-mac";
+		reg = <1>;
+		phy-mode = "rgmii";
+
+		fixed-link {
+			speed = <1000>;
+			full-duplex;
+			pause;
+		};
+	};
+
 	mdio: mdio-bus {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -226,6 +238,18 @@
 					label = "lan3";
 				};
 
+				port@5 {
+					reg = <5>;
+					label = "aux";
+					phy-mode = "rgmii";
+
+					fixed-link {
+						speed = <1000>;
+						full-duplex;
+						pause;
+					};
+				};
+
 				port@6 {
 					reg = <6>;
 					label = "cpu";