linux-kernel - [PATCH net-next v2] dt-bindings: net: aspeed: add AST2700 MDIO compatible

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Message-ID: <20251120-aspeed_mdio_ast2700-v2-1-0d722bfb2c54@aspeedtech.com>
Date: Thu, 20 Nov 2025 11:52:03 +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>, Conor Dooley
	<conor.dooley@...rochip.com>, Jacky Chou <jacky_chou@...eedtech.com>
Subject: [PATCH net-next v2] 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.

Acked-by: Conor Dooley <conor.dooley@...rochip.com>
Signed-off-by: Jacky Chou <jacky_chou@...eedtech.com>
---
Changes in v2:
- Remove AST2700 description from aspeed,ast2600-mdio.yaml
- Link to v1: https://lore.kernel.org/r/20251117-aspeed_mdio_ast2700-v1-1-8ecb0032f554@aspeedtech.com
---
 Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml | 7 ++++++-
 1 file changed, 6 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..a105dc07ed12 100644
--- a/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
+++ b/Documentation/devicetree/bindings/net/aspeed,ast2600-mdio.yaml
@@ -19,7 +19,12 @@ allOf:
 
 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>