linux-kernel - [PATCH net-next v4 2/6] dt-bindings: net: dsa: microchip: add mdio-parent-bus property for internal MDIO

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Message-Id: <20241106075942.1636998-3-o.rempel@pengutronix.de>
Date: Wed,  6 Nov 2024 08:59:37 +0100
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: "David S. Miller" <davem@...emloft.net>,
	Andrew Lunn <andrew@...n.ch>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Vladimir Oltean <olteanv@...il.com>,
	Woojung Huh <woojung.huh@...rochip.com>,
	Arun Ramadoss <arun.ramadoss@...rochip.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Rob Herring <robh+dt@...nel.org>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	kernel@...gutronix.de,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	UNGLinuxDriver@...rochip.com,
	"Russell King (Oracle)" <linux@...linux.org.uk>,
	devicetree@...r.kernel.org,
	Marek Vasut <marex@...x.de>
Subject: [PATCH net-next v4 2/6] dt-bindings: net: dsa: microchip: add mdio-parent-bus property for internal MDIO

Introduce `mdio-parent-bus` property in the ksz DSA bindings to
reference the parent MDIO bus when the internal MDIO bus is attached to
it, bypassing the main management interface.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
 .../devicetree/bindings/net/dsa/microchip,ksz.yaml       | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
index a4e463819d4d7..121a4bbd147be 100644
--- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
@@ -84,6 +84,15 @@ properties:
   mdio:
     $ref: /schemas/net/mdio.yaml#
     unevaluatedProperties: false
+    properties:
+      mdio-parent-bus:
+        $ref: /schemas/types.yaml#/definitions/phandle
+        description:
+          Phandle pointing to the MDIO bus controller connected to the
+          secondary MDIO interface. This property should be used when
+          the internal MDIO bus is accessed via a secondary MDIO
+          interface rather than the primary management interface.
+
     patternProperties:
       "^ethernet-phy@[0-9a-f]$":
         type: object
-- 
2.39.5