linux-kernel - [PATCH net-next 08/13] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear RMII refclk output property

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Message-ID: <458c16ad9764e63747fc0c525cb8b228ed1bab02.1761324950.git.daniel@makrotopia.org>
Date: Fri, 24 Oct 2025 18:03:28 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: Hauke Mehrtens <hauke@...ke-m.de>, Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...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@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Simon Horman <horms@...nel.org>,
	Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Andreas Schirm <andreas.schirm@...mens.com>,
	Lukas Stockmann <lukas.stockmann@...mens.com>,
	Alexander Sverdlin <alexander.sverdlin@...mens.com>,
	Peter Christen <peter.christen@...mens.com>,
	Avinash Jayaraman <ajayaraman@...linear.com>,
	Bing tao Xu <bxu@...linear.com>, Liang Xu <lxu@...linear.com>,
	Juraj Povazanec <jpovazanec@...linear.com>,
	"Fanni (Fang-Yi) Chan" <fchan@...linear.com>,
	"Benny (Ying-Tsan) Weng" <yweng@...linear.com>,
	"Livia M. Rosu" <lrosu@...linear.com>,
	John Crispin <john@...ozen.org>
Subject: [PATCH net-next 08/13] dt-bindings: net: dsa: lantiq,gswip: add
 MaxLinear RMII refclk output property

Add support for the maxlinear,rmii-refclk-out boolean property on port
nodes to configure the RMII reference clock to be an output rather than
an input.

This property is only applicable for non-RGMII ports and allows the
switch to provide the reference clock for RMII-connected PHYs instead
of requiring an external clock source.

This corresponds to the driver changes that read this Device Tree
property to configure the RMII clock direction.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 .../devicetree/bindings/net/dsa/lantiq,gswip.yaml          | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
index ed274bfb8d49..48641c27da10 100644
--- a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
@@ -13,6 +13,8 @@ allOf:
         patternProperties:
           "^port@[0-6]$":
             type: object
+            allOf:
+              - $ref: /schemas/net/dsa/dsa-port.yaml#
             properties:
               tx-internal-delay-ps:
                 enum: [0, 500, 1000, 1500, 2000, 2500, 3000, 3500]
@@ -26,6 +28,11 @@ allOf:
                 description:
                   RGMII RX Clock Delay defined in pico seconds.
                   The delay lines adjust the MII clock vs. data timing.
+              maxlinear,rmii-refclk-out:
+                type: boolean
+                description:
+                  Configure the RMII reference clock to be a clock output
+                  rather than an input. Only applicable for RMII mode.
 
 maintainers:
   - Hauke Mehrtens <hauke@...ke-m.de>
-- 
2.51.0