netdev - Re: [PATCH net-next 3/3] dt-bindings: net: dsa: Document dsa,tag-protocol property

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Date:   Tue, 06 Apr 2021 11:52:37 +0200
From:   Tobias Waldekranz <tobias@...dekranz.com>
To:     Rob Herring <robh@...nel.org>
Cc:     davem@...emloft.net, kuba@...nel.org, andrew@...n.ch,
        vivien.didelot@...il.com, f.fainelli@...il.com, olteanv@...il.com,
        netdev@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] dt-bindings: net: dsa: Document dsa,tag-protocol property

On Sat, Mar 27, 2021 at 12:13, Rob Herring <robh@...nel.org> wrote:
> On Fri, Mar 26, 2021 at 11:56:48AM +0100, Tobias Waldekranz wrote:
>> The 'dsa,tag-protocol' is used to force a switch tree to use a
>> particular tag protocol, typically because the Ethernet controller
>> that it is connected to is not compatible with the default one.
>> 
>> Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>
>> ---
>>  Documentation/devicetree/bindings/net/dsa/dsa.yaml | 7 +++++++
>>  1 file changed, 7 insertions(+)
>> 
>> diff --git a/Documentation/devicetree/bindings/net/dsa/dsa.yaml b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
>> index 8a3494db4d8d..5dcfab049aa2 100644
>> --- a/Documentation/devicetree/bindings/net/dsa/dsa.yaml
>> +++ b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
>> @@ -70,6 +70,13 @@ patternProperties:
>>                device is what the switch port is connected to
>>              $ref: /schemas/types.yaml#/definitions/phandle
>>  
>> +          dsa,tag-protocol:
>
> 'dsa' is not a vendor.

It is not. The property is intended to be consumed by the
vendor-independent driver. So should it be linux,tag-protocol? Just
tag-protocol?

>> +            description:
>> +              Instead of the default, the switch will use this tag protocol if
>> +              possible. Useful when a device supports multiple protcols and
>> +              the default is incompatible with the Ethernet device.
>> +            $ref: /schemas/types.yaml#/definitions/string
>
> You need to define the possible strings.

Alright.

Andrew, Vladimir: I will just list dsa and edsa for now. If it is needed
on other devices, people can add them to the list after they have tested
their drivers. Fair?

>> +
>>            phy-handle: true
>>  
>>            phy-mode: true
>> -- 
>> 2.25.1
>>