netdev - Re: [PATCH 2/4] dt-bindings: net: dsa: document internal MDIO bus

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Date: Wed, 13 Sep 2023 14:35:11 +0300
From: Arınç ÜNAL <arinc.unal@...nc9.com>
To: Vladimir Oltean <olteanv@...il.com>
Cc: Andrew Lunn <andrew@...n.ch>, Florian Fainelli <f.fainelli@...il.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Woojung Huh <woojung.huh@...rochip.com>,
 UNGLinuxDriver@...rochip.com, Linus Walleij <linus.walleij@...aro.org>,
 Alvin Šipraga <alsi@...g-olufsen.dk>,
 Daniel Golle <daniel@...rotopia.org>, Landen Chao
 <Landen.Chao@...iatek.com>, DENG Qingfang <dqfext@...il.com>,
 Sean Wang <sean.wang@...iatek.com>, Matthias Brugger
 <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 mithat.guner@...ont.com, erkin.bozoglu@...ont.com, netdev@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 2/4] dt-bindings: net: dsa: document internal MDIO bus

On 13.09.2023 14:04, Vladimir Oltean wrote:
> I don't think they're for switch ports only. Any driver which uses
> phylink_fwnode_phy_connect() or its derivatives gets subject to the same
> bindings. But putting the sub-schema in ethernet-controller.yaml makes
> sense, just maybe not naming it "phylink-switch".

Got it. Should we disallow managed altogether when fixed-link is also
defined, or just with in-band-status value?

Currently:

diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
index 9f6a5ccbcefe..3b5946a4be34 100644
--- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
@@ -284,6 +284,21 @@ allOf:
              controllers that have configurable TX internal delays. If this
              property is present then the MAC applies the TX delay.

+$defs:
+  phylink:
+    description: phylink bindings for ethernet controllers
+    allOf:
+      - anyOf:
+          - required: [ fixed-link ]
+          - required: [ phy-handle ]
+          - required: [ managed ]
+
+      - if:
+          required: [ fixed-link ]
+        then:
+          properties:
+            managed: false
+
  additionalProperties: true

  ...

Arınç