netdev - [net-next,v2] dt-bindings: net: renesas,ethertsn: Create child-node for MDIO bus

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Date: Sat, 30 Mar 2024 14:12:28 +0100
From: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
To: Sergey Shtylyov <s.shtylyov@....ru>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	netdev@...r.kernel.org,
	devicetree@...r.kernel.org
Cc: linux-renesas-soc@...r.kernel.org,
	Niklas Söderlund <niklas.soderlund+renesas@...natech.se>,
	Rob Herring <robh@...nel.org>
Subject: [net-next,v2] dt-bindings: net: renesas,ethertsn: Create child-node for MDIO bus

The bindings for Renesas Ethernet TSN was just merged in v6.9 and the
design for the bindings followed that of other Renesas Ethernet drivers
and thus did not force a child-node for the MDIO bus. As there
are no upstream drivers or users of this binding yet take the
opportunity to correct this and force the usage of a child-node for the
MDIO bus.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
Reviewed-by: Rob Herring <robh@...nel.org>
---
* Changes since v1
- Expand on history in commit message.

Hello,

The Ethernet TSN driver is still in review and have not been merged and
no usage of the bindings are merged either. So while this breaks the
binding it effects no one. So we can correct this mistake without
breaking any use-cases before we need to support any backward
compatibility.
---
 .../bindings/net/renesas,ethertsn.yaml        | 33 ++++++++-----------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/renesas,ethertsn.yaml b/Documentation/devicetree/bindings/net/renesas,ethertsn.yaml
index ea35d19be829..b4680a1d0a06 100644
--- a/Documentation/devicetree/bindings/net/renesas,ethertsn.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,ethertsn.yaml
@@ -71,16 +71,8 @@ properties:
     enum: [0, 2000]
     default: 0
 
-  '#address-cells':
-    const: 1
-
-  '#size-cells':
-    const: 0
-
-patternProperties:
-  "^ethernet-phy@[0-9a-f]$":
-    type: object
-    $ref: ethernet-phy.yaml#
+  mdio:
+    $ref: /schemas/net/mdio.yaml#
     unevaluatedProperties: false
 
 required:
@@ -94,8 +86,7 @@ required:
   - resets
   - phy-mode
   - phy-handle
-  - '#address-cells'
-  - '#size-cells'
+  - mdio
 
 additionalProperties: false
 
@@ -122,14 +113,18 @@ examples:
         tx-internal-delay-ps = <2000>;
         phy-handle = <&phy3>;
 
-        #address-cells = <1>;
-        #size-cells = <0>;
+        mdio {
+            #address-cells = <1>;
+            #size-cells = <0>;
 
-        phy3: ethernet-phy@3 {
-            compatible = "ethernet-phy-ieee802.3-c45";
-            reg = <0>;
-            interrupt-parent = <&gpio4>;
-            interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
             reset-gpios = <&gpio1 23 GPIO_ACTIVE_LOW>;
+            reset-post-delay-us = <4000>;
+
+            phy3: ethernet-phy@0 {
+                compatible = "ethernet-phy-ieee802.3-c45";
+                reg = <0>;
+                interrupt-parent = <&gpio4>;
+                interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
+            };
         };
     };
-- 
2.44.0