linux-kernel - Re: [PATCH v4 1/1] dt-bindings: net: mdio: change nodename match pattern

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Message-ID: <172384193319.2153392.2293896904577787066.robh@kernel.org>
Date: Fri, 16 Aug 2024 14:58:54 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Andrew Lunn <andrew@...n.ch>, "David S. Miller" <davem@...emloft.net>,
	devicetree@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Heiner Kallweit <hkallweit1@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Russell King <linux@...linux.org.uk>,
	Paolo Abeni <pabeni@...hat.com>, Conor Dooley <conor+dt@...nel.org>,
	imx@...ts.linux.dev, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH v4 1/1] dt-bindings: net: mdio: change nodename match
 pattern


On Thu, 15 Aug 2024 12:34:07 -0400, Frank Li wrote:
> Change mdio.yaml nodename match pattern to
> 	'^mdio(-(bus|external))?(@.+|-([0-9]+))$'
> 
> Fix mdio.yaml wrong parser mdio controller's address instead phy's address
> when mdio-mux exista.
> 
> For example:
> mdio-mux-emi1@54 {
> 	compatible = "mdio-mux-mmioreg", "mdio-mux";
> 
>         mdio@20 {
> 		reg = <0x20>;
> 		       ^^^ This is mdio controller register
> 
> 		ethernet-phy@2 {
> 			reg = <0x2>;
>                               ^^^ This phy's address
> 		};
> 	};
> };
> 
> Only phy's address is limited to 31 because MDIO bus definition.
> 
> But CHECK_DTBS report below warning:
> 
> arch/arm64/boot/dts/freescale/fsl-ls1043a-qds.dtb: mdio-mux-emi1@54:
> 	mdio@20:reg:0:0: 32 is greater than the maximum of 31
> 
> The reason is that "mdio-mux-emi1@54" match "nodename: '^mdio(@.*)?'" in
> mdio.yaml.
> 
> Change to '^mdio(-(bus|external))?(@.+|-([0-9]+))?$' to avoid wrong match
> mdio mux controller's node.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> Change from v3 to v4
> - add ? in end of pattern to allow mdio{}. not touch mdio-gpio.yaml.
> 
> 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.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>