linux-kernel - Re: [PATCH v3] dt-bindings: ata: Add UniPhier controller binding

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Date:   Wed, 22 Feb 2023 10:03:14 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Jens Axboe <axboe@...nel.dk>
Cc:     linux-ide@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] dt-bindings: ata: Add UniPhier controller binding


On 2023/02/20 20:48, Krzysztof Kozlowski wrote:
> On 20/02/2023 06:47, Kunihiko Hayashi wrote:
>> Add UniPhier SATA controller compatible string to the platform binding.
>> This controller needs two or three reset controls.
>>
>> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
>> ---
>>   .../bindings/ata/ahci-platform.yaml           | 32 ++++++++++++++++---
>>   1 file changed, 27 insertions(+), 5 deletions(-)
>>
>> Changes since v2:
>> - Add compatible strings to select property
>> - Add minItems and change maxItems for resets
>> - Move condition schema under allOf property
>> - Change resets to "required" for uniphier-*-ahci
>>
>> Changes since v1:
>> - Restrict resets property changes with compatible strings
>> - Fix maxItems from two to three
>>
>> diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.yaml
>> b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
>> index 7dc2a2e8f598..4b2ee68097b8 100644
>> --- a/Documentation/devicetree/bindings/ata/ahci-platform.yaml
>> +++ b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
>> @@ -30,12 +30,12 @@ select:
>>             - marvell,armada-3700-ahci
>>             - marvell,armada-8k-ahci
>>             - marvell,berlin2q-ahci
>> +          - socionext,uniphier-pro4-ahci
>> +          - socionext,uniphier-pxs2-ahci
>> +          - socionext,uniphier-pxs3-ahci
>>     required:
>>       - compatible
>>
>> -allOf:
>> -  - $ref: "ahci-common.yaml#"
>> -
>>   properties:
>>     compatible:
>>       oneOf:
>> @@ -45,6 +45,9 @@ properties:
>>                 - marvell,armada-8k-ahci
>>                 - marvell,berlin2-ahci
>>                 - marvell,berlin2q-ahci
>> +              - socionext,uniphier-pro4-ahci
>> +              - socionext,uniphier-pxs2-ahci
>> +              - socionext,uniphier-pxs3-ahci
>>             - const: generic-ahci
>>         - enum:
>>             - cavium,octeon-7130-ahci
>> @@ -67,14 +70,33 @@ properties:
>>       minItems: 1
>>       maxItems: 3
>>
>> +  resets:
>> +    minItems: 1
>> +    maxItems: 3
>> +
>>     interrupts:
>>       maxItems: 1
>>
>>     power-domains:
>>       maxItems: 1
>>
>> -  resets:
>> -    maxItems: 1
> 
> Why moving it?

Sorry for my mistake. I should fix it.

>> +allOf:
> 
> This goes to the same place as in example-schema.

I can see "allOf" next to "required" in example-schema,

>> +  - $ref: ahci-common.yaml#
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - socionext,uniphier-pro4-ahci
>> +              - socionext,uniphier-pxs2-ahci
>> +              - socionext,uniphier-pxs3-ahci
>> +    then:
>> +      properties:
>> +        resets:
>> +          minItems: 2
>> +          maxItems: 3
> 
> You need to describe the items, what's expected here.

I'll add the descriptions for each reset for the compatible.
However, I'm afraid this "if" part will grow for UniPhier resets
in common ahci-platform.

> 
>> +      required:
>> +        - resets
> 
> The entire point was to add:
> 
> else - maxItems: 1

I'll add it.

Thank you,

---
Best Regards
Kunihiko Hayashi