netdev - Re: [RFC PATCH net-next 1/9] dt-bindings: net: dsa: convert ksz bindings document to yaml

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Date:   Wed, 21 Oct 2020 17:40:23 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>,
        Kurt Kanzenbach <kurt.kanzenbach@...utronix.de>
Cc:     Christian Eggers <ceggers@...i.de>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Helmut Grohne <helmut.grohne@...enta.de>,
        Paul Barker <pbarker@...sulko.com>,
        Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        George McCollister <george.mccollister@...il.com>,
        Marek Vasut <marex@...x.de>,
        Tristram Ha <Tristram.Ha@...rochip.com>,
        "David S . Miller" <davem@...emloft.net>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH net-next 1/9] dt-bindings: net: dsa: convert ksz
 bindings document to yaml



On 10/21/2020 5:16 PM, Vladimir Oltean wrote:
> On Wed, Oct 21, 2020 at 08:52:01AM +0200, Kurt Kanzenbach wrote:
>> On Mon Oct 19 2020, Christian Eggers wrote:
>> The node names should be switch. See dsa.yaml.
>>
>>> +            compatible = "microchip,ksz9477";
>>> +            reg = <0>;
>>> +            reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
>>> +
>>> +            spi-max-frequency = <44000000>;
>>> +            spi-cpha;
>>> +            spi-cpol;
>>> +
>>> +            ports {
>>
>> ethernet-ports are preferred.
> 
> This is backwards to me, instead of an 'ethernet-switch' with 'ports',
> we have a 'switch' with 'ethernet-ports'. Whatever.

The rationale AFAIR was that dual Ethernet port controllers like TI's 
CPSW needed to describe each port as a pseudo Ethernet MAC and using 
'ethernet-ports' as a contained allowed to disambiguate with the 'ports' 
container used in display subsystem descriptions. We should probably 
enforce or recommend 'ethernet-switch' to be used as the node name for 
Ethernet switch devices though.
-- 
Florian