netdev - Re: [PATCH v2 4/7] dt-bindings: net: dsa: mediatek,mt7530: define port binding per compatible

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Message-ID: <d2279a7d-bbc3-c772-1f30-251f056341bb@linaro.org>
Date:   Fri, 19 Aug 2022 15:43:17 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "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>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        Luiz Angelo Daros de Luca <luizluca@...il.com>,
        Sander Vanheule <sander@...nheule.net>,
        René van Dorst <opensource@...rst.com>,
        Daniel Golle <daniel@...rotopia.org>, erkin.bozoglu@...ont.com,
        Sergio Paracuellos <sergio.paracuellos@...il.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/7] dt-bindings: net: dsa: mediatek,mt7530: define
 port binding per compatible

On 13/08/2022 18:44, Arınç ÜNAL wrote:
> Define DSA port binding under each compatible device as each device
> requires different values for certain properties.
> 
> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> ---
>  .../bindings/net/dsa/mediatek,mt7530.yaml     | 116 +++++++++++++-----
>  1 file changed, 87 insertions(+), 29 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> index cc87f48d4d07..ff51a2f6875f 100644
> --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> @@ -130,35 +130,6 @@ properties:
>        ethsys.
>      maxItems: 1
>  
> -patternProperties:
> -  "^(ethernet-)?ports$":
> -    type: object
> -
> -    patternProperties:
> -      "^(ethernet-)?port@[0-9]+$":
> -        type: object
> -        description: Ethernet switch ports
> -

my comments from v1 apply here

None of the reasons you said force you to define properties in some
allOf:if:then subblock. These force you to constrain the properties in
allOf:if:then, but not define.


> I can split patternProperties to two sections, but I can't directly
> define the reg property like you put above.

Of course you can and original bindings were doing it.

Let me ask specific questions (yes, no):
1. Are ethernet-ports and ethernet-port present in each variant?
2. Is dsa-port.yaml applicable to each variant? (looks like that - three
compatibles, three all:if:then)
3. If reg appearing in each variant?
4. If above is true, if reg is maximum one item in each variant?

Looking at your patch, I think answer is 4x yes, which means you can
define them in one place and constrain in allOf:if:then, just like all
other schemas, because this one is not different.

Best regards,
Krzysztof