linux-kernel - [PATCH net-next] dt-bindings: net: aspeed: add AST2700 MDIO compatible

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Message-ID: <20251117-aspeed_mdio_ast2700-v1-1-8ecb0032f554@aspeedtech.com>
Date: Mon, 17 Nov 2025 15:30:18 +0800
From: Jacky Chou <jacky_chou@...eedtech.com>
To: Andrew Lunn <andrew+netdev@...n.ch>, "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>, Joel Stanley <joel@....id.au>, Andrew Jeffery
	<andrew@...econstruct.com.au>
CC: Andrew Jeffery <andrew@...id.au>, <netdev@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>, Jacky Chou
	<jacky_chou@...eedtech.com>
Subject: [PATCH net-next] dt-bindings: net: aspeed: add AST2700 MDIO
 compatible

Add "aspeed,ast2700-mdio" compatible to the binding schema with a fallback
to "aspeed,ast2600-mdio".

Although the MDIO controller on AST2700 is functionally the same as the
one on AST2600, it's good practice to add a SoC-specific compatible for
new silicon. This allows future driver updates to handle any 2700-specific
integration issues without requiring devicetree changes or complex
runtime detection logic.

For now, the driver continues to bind via the existing
"aspeed,ast2600-mdio" compatible, so no driver changes are needed.

Signed-off-by: Jacky Chou <jacky_chou@...eedtech.com>
---
 Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
index d6ef468495c5..1c90e7c15a44 100644
--- a/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
+++ b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
@@ -13,13 +13,19 @@ description: |+
   The ASPEED AST2600 MDIO controller is the third iteration of ASPEED's MDIO
   bus register interface, this time also separating out the controller from the
   MAC.
+  The ASPEED AST2700 MDIO controller is similar to the AST2600's.
 
 allOf:
   - $ref: mdio.yaml#
 
 properties:
   compatible:
-    const: aspeed,ast2600-mdio
+    oneOf:
+      - const: aspeed,ast2600-mdio
+      - items:
+          - enum:
+              - aspeed,ast2700-mdio
+          - const: aspeed,ast2600-mdio
 
   reg:
     maxItems: 1

---
base-commit: c9dfb92de0738eb7fe6a591ad1642333793e8b6e
change-id: 20251117-aspeed_mdio_ast2700-aa089c4f0474

Best regards,
-- 
Jacky Chou <jacky_chou@...eedtech.com>