netdev - [PATCH v2 1/4] dt-bindings: net: realtek,rtl82xx: add a property to set MDI order

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Message-ID: <20260121151506.813783-1-dam.dejean@gmail.com>
Date: Wed, 21 Jan 2026 16:15:03 +0100
From: Damien Dejean <dam.dejean@...il.com>
To: andrew@...n.ch,
	krzk+dt@...nel.org
Cc: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	edumazet@...gle.com,
	davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	hkallweit1@...il.com,
	Damien Dejean <dam.dejean@...il.com>
Subject: [PATCH v2 1/4] dt-bindings: net: realtek,rtl82xx: add a property to set MDI order

MDI pair order reversal is usually configured by the bootloader.
However, on some design the configuration is left untouched during boot
and needs to be set by the driver.

Add the property 'realtek,mdi-cfg-order' to allow forcing normal or
reverse order of the MDI pairs.

Signed-off-by: Damien Dejean <dam.dejean@...il.com>
---
 Documentation/devicetree/bindings/net/realtek,rtl82xx.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/realtek,rtl82xx.yaml b/Documentation/devicetree/bindings/net/realtek,rtl82xx.yaml
index 2b5697bd7c5d..c4ced671ecb8 100644
--- a/Documentation/devicetree/bindings/net/realtek,rtl82xx.yaml
+++ b/Documentation/devicetree/bindings/net/realtek,rtl82xx.yaml
@@ -55,6 +55,12 @@ properties:
     description:
       Enable Wake-on-LAN support for the RTL8211F PHY.
 
+  realtek,mdi-cfg-order:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    description:
+      Force normal (0) or reverse (1) order of MDI pairs.
+
 unevaluatedProperties: false
 
 allOf:
@@ -79,5 +85,6 @@ examples:
                 reg = <1>;
                 realtek,clkout-disable;
                 realtek,aldps-enable;
+                realtek,mdi-cfg-order = <1>;
         };
     };

base-commit: 983d014aafb14ee5e4915465bf8948e8f3a723b5
-- 
2.47.3