linux-kernel - Re: [PATCH v12 1/2] spi: add loongson spi bindings

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Date:   Thu, 8 Jun 2023 10:53:39 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     zhuyinbo <zhuyinbo@...ngson.cn>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Jianmin Lv <lvjianmin@...ngson.cn>, wanghongliang@...ngson.cn,
        Liu Peibao <liupeibao@...ngson.cn>,
        loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v12 1/2] spi: add loongson spi bindings

On 08/06/2023 10:39, zhuyinbo wrote:
>>>
>>> Signed-off-by: Yinbo Zhu <zhuyinbo@...ngson.cn>
>>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>>> ---
>>>   .../bindings/spi/loongson,ls2k-spi.yaml       | 41 +++++++++++++++++++
>>>   MAINTAINERS                                   |  6 +++
>>>   2 files changed, 47 insertions(+)
>>>   create mode 100644 Documentation/devicetree/bindings/spi/loongson,ls2k-spi.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/spi/loongson,ls2k-spi.yaml b/Documentation/devicetree/bindings/spi/loongson,ls2k-spi.yaml
>>> new file mode 100644
>>> index 000000000000..423ee851edd5
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/spi/loongson,ls2k-spi.yaml
>>
>> Filename based on compatible.
> 
> 
> There will be more ls2k series SoC spi device in the future thus I still
> use "loongson,ls2k-spi.yaml" for cover it.

Add them now.

> 
>>
>>> @@ -0,0 +1,41 @@
>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/spi/loongson,ls2k-spi.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Loongson SPI controller
>>> +
>>> +maintainers:
>>> +  - Yinbo Zhu <zhuyinbo@...ngson.cn>
>>> +
>>> +allOf:
>>> +  - $ref: /schemas/spi/spi-controller.yaml#
>>> +
>>> +properties:
>>> +  compatible:
>>> +    enum:
>>> +      - loongson,ls2k1000-spi
>>
>> No compatibles for other devices? Didn't we have big discussion about this?
>>
>> https://elixir.bootlin.com/linux/v6.1-rc1/source/Documentation/devicetree/bindings/writing-bindings.rst#L42
> 
> 
> There are other ls2k SPI devices compatible, such as,
> "loongson,ls2k0500-spi", "loongson,ls2k2000-spi" but currently I plan to
> add ls2k1000 spi device first, Other ls2k SoC spi device adaptation may
> require some additional work and I will add it later.

Previously you claimed this serves entire family, so I don't understand
why you need to fix something. Why previously it was working for entire
family but now it does not?

Best regards,
Krzysztof