linux-kernel - [PATCH v3 1/1] dt-bindings: net: mdio: change nodename match pattern

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Message-Id: <20240814170322.4023572-1-Frank.Li@nxp.com>
Date: Wed, 14 Aug 2024 13:03:21 -0400
From: Frank Li <Frank.Li@....com>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"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>,
	Florian Fainelli <f.fainelli@...il.com>,
	netdev@...r.kernel.org (open list:ETHERNET PHY LIBRARY),
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH v3 1/1] dt-bindings: net: mdio: change nodename match pattern

Change mdio.yaml nodename match pattern to
	'^mdio(-(bus|external))?(@.+|-([0-9]+))$'

Fix mdio.yaml wrong parser mdio controller's address instead phy's address
when mdio-mux exist.

For example:
mdio-mux-emi1@54 {
	compatible = "mdio-mux-mmioreg", "mdio-mux";

        mdio@20 {
		reg = <0x20>;
		       ^^^ This is mdio controller register

		ethernet-phy@2 {
			reg = <0x2>;
                              ^^^ This phy's address
		};
	};
};

Only phy's address is limited to 31 because MDIO bus definition.

But CHECK_DTBS report below warning:

arch/arm64/boot/dts/freescale/fsl-ls1043a-qds.dtb: mdio-mux-emi1@54:
	mdio@20:reg:0:0: 32 is greater than the maximum of 31

The reason is that "mdio-mux-emi1@54" match "nodename: '^mdio(@.*)?'" in
mdio.yaml.

Change to '^mdio(-(bus|external))?(@.+|-([0-9]+))$' to avoid wrong match
mdio mux controller's node.

Also change node name mdio to mdio-0 in example of mdio-gpio.yaml to avoid
warning.

Signed-off-by: Frank Li <Frank.Li@....com>
---
Change from v2 to v3
- update mdio-gpio.yaml node name mdio to mdio-0 to fix dt_binding_check
error foud by rob's bot.

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/net/mdio-gpio.example.dtb: mdio: $nodename:0: 'mdio' does not match '^mdio(-(bus|external))?(@.+|-([0-9]+))$'
	from schema $id: http://devicetree.org/schemas/net/mdio-gpio.yaml#

Change from v1 to v2
- use rob's suggest to fix node name pattern.
---
 Documentation/devicetree/bindings/net/mdio-gpio.yaml | 2 +-
 Documentation/devicetree/bindings/net/mdio.yaml      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/mdio-gpio.yaml b/Documentation/devicetree/bindings/net/mdio-gpio.yaml
index eb4171a1940e4..3be4f94638e61 100644
--- a/Documentation/devicetree/bindings/net/mdio-gpio.yaml
+++ b/Documentation/devicetree/bindings/net/mdio-gpio.yaml
@@ -44,7 +44,7 @@ examples:
         mdio-gpio0 = &mdio0;
     };
 
-    mdio0: mdio {
+    mdio0: mdio-0 {
       compatible = "virtual,mdio-gpio";
       #address-cells = <1>;
       #size-cells = <0>;
diff --git a/Documentation/devicetree/bindings/net/mdio.yaml b/Documentation/devicetree/bindings/net/mdio.yaml
index a266ade918ca7..2ed787e4fbbf2 100644
--- a/Documentation/devicetree/bindings/net/mdio.yaml
+++ b/Documentation/devicetree/bindings/net/mdio.yaml
@@ -19,7 +19,7 @@ description:
 
 properties:
   $nodename:
-    pattern: "^mdio(@.*)?"
+    pattern: '^mdio(-(bus|external))?(@.+|-([0-9]+))$'
 
   "#address-cells":
     const: 1
-- 
2.34.1