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Message-ID: <d24f1e60-0ef3-2cb9-9675-846d861ef0c8@linaro.org>
Date:   Mon, 12 Jun 2023 10:16:40 +0200
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Subject: Re: [PATCH v12 1/2] spi: add loongson spi bindings
To:     zhuyinbo <zhuyinbo@loongson.cn>, Mark Brown <broonie@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        linux-spi@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Cc:     Jianmin Lv <lvjianmin@loongson.cn>, wanghongliang@loongson.cn,
        Liu Peibao <liupeibao@loongson.cn>,
        loongson-kernel@lists.loongnix.cn
References: <20230608072819.25930-1-zhuyinbo@loongson.cn>
 <20230608072819.25930-2-zhuyinbo@loongson.cn>
 <6ebed84c-2b42-c981-7b3f-e71cc88e4c2c@linaro.org>
 <4bf747c4-b767-b20c-e00f-724b50f44edb@loongson.cn>
 <6bfc2a22-6901-0858-7b90-bc4c52c66810@linaro.org>
 <bd2d7830-3ab6-0906-b06a-83d3e0a96749@loongson.cn>
 <11ca2b90-544d-18c2-fb15-7909ca60507f@linaro.org>
 <f6d4ecb5-e9df-346e-4aab-772fd01689c8@loongson.cn>
 <a9952e76-1204-5bc7-7856-0c7f8a411d76@linaro.org>
 <9c94397d-1e31-02fa-bdbe-af888c72eac4@loongson.cn>
 <657f8d19-de83-8be6-4a9d-5f13b1df7383@linaro.org>
 <b0e5e13e-6746-bd90-2a49-31ee6dd3e8a2@loongson.cn>
 <84ccf4cc-072d-adbf-0361-95ceae13f333@linaro.org>
 <5d060cac-ff28-60e9-98a8-f2bd4d378455@loongson.cn>
 <4e30870d-86e2-8536-8e0d-aab4ce5027d2@linaro.org>
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From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <0c532e09-4821-5e07-92e6-7bc3cd79869e@loongson.cn>
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On 12/06/2023 09:40, zhuyinbo wrote:
> 
> 
> 在 2023/6/12 下午3:17, Krzysztof Kozlowski 写道:
>> On 12/06/2023 09:13, zhuyinbo wrote:
>>>
>>>
>>> 在 2023/6/10 上午12:45, Krzysztof Kozlowski 写道:
>>>> On 09/06/2023 05:13, zhuyinbo wrote:
>>>>>
>>>>>
>>>>> 在 2023/6/8 下午9:26, Krzysztof Kozlowski 写道:
>>>>>> On 08/06/2023 14:10, zhuyinbo wrote:
>>>>>>>
>>>>>>>
>>>>>>> 在 2023/6/8 下午7:45, Krzysztof Kozlowski 写道:
>>>>>>>> On 08/06/2023 13:42, zhuyinbo wrote:
>>>>>>>>> --- a/Documentation/devicetree/bindings/spi/loongson,ls2k-spi.yaml
>>>>>>>>> +++ b/Documentation/devicetree/bindings/spi/loongson,ls2k-spi.yaml
>>>>>>>>> @@ -16,6 +16,7 @@ properties:
>>>>>>>>>         compatible:
>>>>>>>>>           enum:
>>>>>>>>>             - loongson,ls2k1000-spi
>>>>>>>>> +      - loongson,ls2k0500-spi
>>>>>>>>
>>>>>>>> Aren't they compatible?
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Are you saying that the spi driver is compatible with 2k0500 ?
>>>>>>
>>>>>> Didn't you say this through 11 previous revisions?
>>>>>
>>>>>
>>>>> Yes, did I understand your meaning incorrectly ?
>>>>
>>>> If they are compatible, then they are not part of one enum. They could
>>>> not be as this would easily fail in testing of your DTS.
>>>>
>>>
>>>
>>> The "loongson,ls2k0500-spi" wasn't a compatible in previous version and
>>> I will add "loongson,ls2k0500-spi" as a compatible in spi driver and
>>> added it as a part of the one enum in dt-binding.
>>
>> No, because you claimed - if I understood correctly - that they are
>> compatible. Don't add fake entries to the driver.
>>
> 
> 
> I'm a bit confused, and I just need to add 'loongson,ls2k0500-spi' as
> one enum in dt-bindings, but driver don't add this entry ?

Compatibility is expressed with a list:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#compatible
so it cannot be just one enum, but "items". There are hundreds of
examples including example-schema.


Best regards,
Krzysztof