netdev - [PATCH v1 1/2] dt-bindings: net: mediatek: Support custom ifname

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Message-Id: <20210613115820.1525478-1-code@reto-schneider.ch>
Date:   Sun, 13 Jun 2021 13:58:18 +0200
From:   Reto Schneider <code@...o-schneider.ch>
To:     devicetree@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        netdev@...r.kernel.org
Cc:     Stefan Roese <sr@...x.de>,
        Reto Schneider <reto.schneider@...qvarnagroup.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/2] dt-bindings: net: mediatek: Support custom ifname

From: Reto Schneider <reto.schneider@...qvarnagroup.com>

The (optional) label property allows to specify customized interfaces
names.

The motivation behind this change is to allow embedded devices to keep
their first switch port be named "eth0", even when switching to the DSA
architecture. In order to do so, it must be possible to name the MAC
interface differently from eth0.

Signed-off-by: Reto Schneider <reto.schneider@...qvarnagroup.com>
---

 Documentation/devicetree/bindings/net/mediatek-net.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/mediatek-net.txt b/Documentation/devicetree/bindings/net/mediatek-net.txt
index 72d03e07cf7c..93e35f239a0a 100644
--- a/Documentation/devicetree/bindings/net/mediatek-net.txt
+++ b/Documentation/devicetree/bindings/net/mediatek-net.txt
@@ -51,6 +51,9 @@ Required properties:
 	is equal to 0 and the MAC uses fixed-link to connect
 	with internal switch such as MT7530.
 
+Optional properties:
+- label: Name of interface, defaults to ethX if missing
+
 Example:
 
 eth: ethernet@...00000 {
@@ -76,6 +79,7 @@ eth: ethernet@...00000 {
 		compatible = "mediatek,eth-mac";
 		reg = <0>;
 		phy-handle = <&phy0>;
+		label = "mac1";
 	};
 
 	gmac2: mac@1 {
-- 
2.30.2