Re: Re: [PATCH v2 2/3] dt-bindings: thermal: Convert loongson2 to json-schema

[朱银波]

> -----原始邮件-----
> 发件人: "Krzysztof Kozlowski" <krzysztof.kozlowski@xxxxxxxxxx>
> 发送时间:2022-09-21 17:31:11 (星期三)
> 收件人: "朱银波" <zhuyinbo@xxxxxxxxxxx>
> 抄送: "Rafael J . Wysocki" <rafael@xxxxxxxxxx>, "Daniel Lezcano" <daniel.lezcano@xxxxxxxxxx>, "Amit Kucheria" <amitk@xxxxxxxxxx>, "Zhang Rui" <rui.zhang@xxxxxxxxx>, linux-pm@xxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, zhanghongchen <zhanghongchen@xxxxxxxxxxx>
> 主题: Re: [PATCH v2 2/3] dt-bindings: thermal: Convert loongson2 to json-schema
> 
> On 21/09/2022 11:22, 朱银波 wrote:
> >> -----原始邮件-----
> >> 发件人: "Krzysztof Kozlowski" <krzysztof.kozlowski@xxxxxxxxxx>
> >> 发送时间:2022-09-21 15:05:00 (星期三)
> >> 收件人: "Yinbo Zhu" <zhuyinbo@xxxxxxxxxxx>, "Rafael J . Wysocki" <rafael@xxxxxxxxxx>, "Daniel Lezcano" <daniel.lezcano@xxxxxxxxxx>, "Amit Kucheria" <amitk@xxxxxxxxxx>, "Zhang Rui" <rui.zhang@xxxxxxxxx>, "Rob Herring" <robh+dt@xxxxxxxxxx>, "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@xxxxxxxxxx>, linux-pm@xxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
> >> 抄送: zhanghongchen <zhanghongchen@xxxxxxxxxxx>
> >> 主题: Re: [PATCH v2 2/3] dt-bindings: thermal: Convert loongson2 to json-schema
> >>
> >> On 21/09/2022 03:56, Yinbo Zhu wrote:
> >>> Convert the loongson2 thermal binding to DT schema format using
> >>> json-schema.
> >>
> >> Incorrect subject and incorrect commit msg. There is no conversion here.
> > Our soc architecture is the loongson2 series, so we will modify it accordingly.
> 
> How the soc architecture is related to my comment that you do not
> perform conversion?
I got it, and I will aad a conversion.
> 
> > 
> >>
> >>>
> >>> Signed-off-by: Yinbo Zhu <c>
> >>> ---
> >>> Change in v2:
> >>> 		1. Add description and type about the "id".	
> >>> 		2. Make the filename was based on compatible.
> >>>
> >>>  .../bindings/thermal/loongson2-thermal.yaml   | 52 +++++++++++++++++++
> >>>  1 file changed, 52 insertions(+)
> >>>  create mode 100644 Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml b/Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml
> >>> new file mode 100644
> >>> index 000000000000..2994ae3a56aa
> >>> --- /dev/null
> >>> +++ b/Documentation/devicetree/bindings/thermal/loongson2-thermal.yaml
> >>
> >>
> >> No improvements here. You ignore my comments, so I am going to NAK it.
> > I don't get your point, that dts compatible is "loongson,loongson2-thermal", so this driver file name is named
> > loongson2-thermal that according what you said about "Filename based on compatible."
> > If what I understand is not what you expect, please tell me how to modify it.
> 
> 
> Filename must match the compatible, so: loongson,loongson2-thermal.yaml
I got it, and I will add a conversion.
> 
> >>
> >>
> >>> @@ -0,0 +1,52 @@
> >>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> >>> +%YAML 1.2
> >>> +---
> >>> +$id: http://devicetree.org/schemas/thermal/loongson2-thermal.yaml#
> >>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >>> +
> >>> +title: Thermal sensors on loongson2 SoCs
> >>> +
> >>> +maintainers:
> >>> +  - zhanghongchen <zhanghongchen@xxxxxxxxxxx>
> >>> +  - Yinbo Zhu <zhuyinbo@xxxxxxxxxxx>
> >>> +
> >>> +properties:
> >>> +  compatible:
> >>> +    const: loongson,loongson2-thermal
> >>> +
> >>> +  reg:
> >>> +    maxItems: 1
> >>> +
> >>> +  id:
> >>> +    $ref: '//schemas/types.yaml#/definitions/uint32'
> >>
> >> No improvements here, so let me be specific - you need to really justify
> >> such property or it cannot go to schema.
> > The loongson2_thermal.c driver need parse this "id" property.
> 
> This is not reason to add properties to DT. DT describes the hardware,
> not driver behavior.
> 
> Why hardware needs arbitrary, additional addressing number instead of
> standard unit address?
The loongson2 series soc supports up to four sensors, but the 2K1000 has only one sensor, so the ID must be 0. 
For the 2K1000, in order to distinguish the differences between different hardware in the Loongson2 SoC series,
the ID is added to the dts
> 
> >>
> >>> +    description: |
> >>> +      Specify the thermal sensor id.
> >>> +    minimum: 0
> >>> +    maximum: 3
> >>> +
> >>> +  interrupts:
> >>> +    maxItems: 1
> >>> +
> >>> +  "#thermal-sensor-cells":
> >>> +    const: 1
> >>> +
> >>> +required:
> >>> +  - compatible
> >>> +  - reg
> >>> +  - id
> >>> +  - interrupt-parent
> >>
> >> Why?
> > The interrupts of our dts do not specify an interrupt parent,
> > eg. interrupts = <7 IRQ_TYPE_LEVEL_LOW>
> > so we need to add an interrupt parent property.
> 
> You can add but I am asking why is it required?
Since there is more than one interrupt controller in the Loongson2 series soc, that need to specify the interrupt 
controller in the dts, that is, the interrupt parent.   If different interrupt parents are used in dts, the interrupt 
numbers are different.
> 
> >>
> >>> +  - interrupts
> >>> +  - '#thermal-sensor-cells'
> >>
> >> Use the same style of quote: ' or ".
> > okay, I will have a change.
> >>
> >>> +
> >>> +additionalProperties: false
> >>> +
> >>> +examples:
> >>> +  - |
> >>> +    thermal: thermal@1fe01500 {
> >>
> >> How other similar nodes are named (in other DTS files)?
> > I refer qoriq platform,
> >     tmu@f0000 {
> >         compatible = "fsl,qoriq-tmu";
> > 
> >  You mean to modify it like this
> > - thermal: thermal@1fe01500 {
> > + thermal@1fe01500 {
> > 
> 
> No, just thermal-sensor@1fe01500
okay, I got it.
> 
> 
> Best regards,
> Krzysztof


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