linux-kernel - Re: [PATCH v3 1/5] dt-bindings: spi: sun6i: add DT bindings for Allwinner R329/D1/R528/T113s SPI

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Message-ID: <cab7a294-cc2e-6070-8c89-77ca93eb52ab@linaro.org>
Date:   Sun, 7 May 2023 09:43:30 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Icenowy Zheng <icenowy@...c.io>,
        Maksim Kiselev <bigunclemax@...il.com>,
        Andre Przywara <andre.przywara@....com>
Cc:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
        Maxime Ripard <mripard@...nel.org>, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v3 1/5] dt-bindings: spi: sun6i: add DT bindings for
 Allwinner R329/D1/R528/T113s SPI

On 07/05/2023 06:06, Icenowy Zheng wrote:
> 在 2023-05-07星期日的 02:26 +0300，Maksim Kiselev写道：
>> Listed above Allwinner SoCs has two SPI controllers. First is the
>> regular
>> SPI controller and the second one has additional functionality for
>> MIPI-DBI Type C.
>>
>> Add compatible strings for these controllers
>>
>> Signed-off-by: Maksim Kiselev <bigunclemax@...il.com>
>> ---
>>  .../devicetree/bindings/spi/allwinner,sun6i-a31-spi.yaml   | 7
>> +++++++
>>  1 file changed, 7 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/spi/allwinner,sun6i-
>> a31-spi.yaml b/Documentation/devicetree/bindings/spi/allwinner,sun6i-
>> a31-spi.yaml
>> index de36c6a34a0f..807dde457e3b 100644
>> --- a/Documentation/devicetree/bindings/spi/allwinner,sun6i-a31-
>> spi.yaml
>> +++ b/Documentation/devicetree/bindings/spi/allwinner,sun6i-a31-
>> spi.yaml
>> @@ -21,6 +21,7 @@ properties:
>>      oneOf:
>>        - const: allwinner,sun6i-a31-spi
>>        - const: allwinner,sun8i-h3-spi
>> +      - const: allwinner,sun50i-r329-spi
>>        - items:
>>            - enum:
>>                - allwinner,sun8i-r40-spi
>> @@ -28,6 +29,12 @@ properties:
>>                - allwinner,sun50i-h616-spi
>>                - allwinner,suniv-f1c100s-spi
>>            - const: allwinner,sun8i-h3-spi
>> +      - items:
>> +          - enum:
>> +              - allwinner,sun20i-d1-spi
>> +              - allwinner,sun20i-d1-spi-dbi
> 
> In this case I will prefer to list all 4 compatibles if backward
> compatibility is used:
> "allwinner,sun20i-d1-spi-dbi", "allwinner-sun20i-d1-spi",
> "allwinner,sun50i-r329-spi-dbi", "allwinner, sun50i-r329-spi", in case
> if we were gaining support for either quirks of D1 controller or
> SPI_DBI controllers.
> 

I don't understand. If I see correctly, all four of them are specified.

Best regards,
Krzysztof