linux-kernel - Re: [PATCH 1/3] dt-bindings: net: move bcm6368-mdio-mux bindings to b53

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Date:   Sun, 19 Mar 2023 12:35:29 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Álvaro Fernández Rojas <noltari@...il.com>,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, f.fainelli@...il.com,
        jonas.gorski@...il.com, andrew@...n.ch, olteanv@...il.com,
        hkallweit1@...il.com, linux@...linux.org.uk,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: net: move bcm6368-mdio-mux bindings to
 b53

On 17/03/2023 12:34, Álvaro Fernández Rojas wrote:
> b53 MMAP devices have a MDIO Mux bus controller that must be registered after
> properly initializing the switch. If the MDIO Mux controller is registered
> from a separate driver and the device has an external switch present, it will
> cause a race condition which will hang the device.

Are you sure it is wrapped according to Linux coding style?
https://elixir.bootlin.com/linux/v5.18-rc4/source/Documentation/process/submitting-patches.rst#L586

Your rationale does not justify incompatible binding change, especially
that it could be probably solved by including the child in the parent.

Anyway, Linux driver boot order is not a reason to change bindings really.


Best regards,
Krzysztof