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

From: "Arınç ÜNAL" <arinc.unal@arinc9.com>
To: "Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>,
	"Andrew Lunn" <andrew@lunn.ch>,
	"Vivien Didelot" <vivien.didelot@gmail.com>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Vladimir Oltean" <olteanv@gmail.com>,
	"David S . Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
	"Matthias Brugger" <matthias.bgg@gmail.com>,
	"Sean Wang" <sean.wang@mediatek.com>,
	"Landen Chao" <Landen.Chao@mediatek.com>,
	"DENG Qingfang" <dqfext@gmail.com>,
	"Frank Wunderlich" <frank-w@public-files.de>,
	"Luiz Angelo Daros de Luca" <luizluca@gmail.com>,
	"Sander Vanheule" <sander@svanheule.net>,
	"René van Dorst" <opensource@vdorst.com>,
	"Daniel Golle" <daniel@makrotopia.org>,
	erkin.bozoglu@xeront.com,
	"Sergio Paracuellos" <sergio.paracuellos@gmail.com>
Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 4/7] dt-bindings: net: dsa: mediatek,mt7530: define port binding per compatible
Date: Sat, 20 Aug 2022 10:34:08 +0300	[thread overview]
Message-ID: <0bf02926-753e-e8d5-1d87-f286ed743fb2@arinc9.com> (raw)
In-Reply-To: <d2279a7d-bbc3-c772-1f30-251f056341bb@linaro.org>

On 19.08.2022 15:43, Krzysztof Kozlowski wrote:
> 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@arinc9.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?

All yes.

> 
> 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.

If I understand correctly, I do this already with v3. Properties are 
defined under the constructed node. Accepted values for properties are 
constrained under if:then.

Arınç