netdev - [PATCH v4 1/3] dt-bindings: net: sophgo,sg2044-dwmac: add phy mode restriction

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Message-ID: <20251028003858.267040-2-inochiama@gmail.com>
Date: Tue, 28 Oct 2025 08:38:56 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Han Gao <rabenda.cn@...il.com>,
	Icenowy Zheng <uwu@...nowy.me>,
	Vivian Wang <wangruikang@...as.ac.cn>,
	Yao Zi <ziyao@...root.org>,
	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>,
	Chen Wang <unicorn_wang@...look.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	sophgo@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org,
	Yixun Lan <dlan@...too.org>,
	Longbin Li <looong.bin@...il.com>
Subject: [PATCH v4 1/3] dt-bindings: net: sophgo,sg2044-dwmac: add phy mode restriction

As the ethernet controller of SG2044 and SG2042 only supports
RGMII phy. Add phy-mode property to restrict the value.

Also, since SG2042 has internal rx delay in its mac, make
only "rgmii-txid" and "rgmii-id" valid for phy-mode.

Signed-off-by: Inochi Amaoto <inochiama@...il.com>
---
 .../bindings/net/sophgo,sg2044-dwmac.yaml     | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
index ce21979a2d9a..916ef8f4838a 100644
--- a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
@@ -70,6 +70,26 @@ required:
 
 allOf:
   - $ref: snps,dwmac.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: sophgo,sg2042-dwmac
+    then:
+      properties:
+        phy-mode:
+          enum:
+            - rgmii-txid
+            - rgmii-id
+    else:
+      properties:
+        phy-mode:
+          enum:
+            - rgmii
+            - rgmii-rxid
+            - rgmii-txid
+            - rgmii-id
+
 
 unevaluatedProperties: false
 
-- 
2.51.1