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

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Date:   Thu, 8 Jun 2023 16:39:29 +0800
From:   zhuyinbo <zhuyinbo@...ngson.cn>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        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, zhuyinbo@...ngson.cn
Subject: Re: [PATCH v12 1/2] spi: add loongson spi bindings



在 2023/6/8 下午3:45, Krzysztof Kozlowski 写道:
> On 08/06/2023 09:28, Yinbo Zhu wrote:
>> Add the Loongson platform spi binding with DT schema format using
>> json-schema.
> 
> Please use subject prefixes matching the subsystem. You can get them for
> example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
> your patch is touching.
> 
> The prefix for SPI should be: "spi: dt-bindings: ". In the same time
> last "bindings" are redundant.


okay, I got it.

> 
>>
>> 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.

> 
>> @@ -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.

Thanks