linux-kernel - Re: [PATCH 2/3] dt-bindings: SPI: Add Ingenic SFC bindings.

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Date:   Sun, 24 Jul 2022 00:50:40 +0800
From:   Zhou Yanjie <zhouyanjie@...yeetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        tudor.ambarus@...rochip.com, p.yadav@...com, michael@...le.cc,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        broonie@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     linux-mtd@...ts.infradead.org, linux-spi@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, aidanmacdonald.0x0@...il.com,
        tmn505@...il.com, paul@...pouillou.net, dongsheng.qiu@...enic.com,
        aric.pzqi@...enic.com, rick.tyliu@...enic.com,
        jinghui.liu@...enic.com, sernia.zhou@...mail.com,
        reimu@...omaker.com
Subject: Re: [PATCH 2/3] dt-bindings: SPI: Add Ingenic SFC bindings.

Hi Krzysztof,

On 2022/7/23 上午1:46, Krzysztof Kozlowski wrote:
> On 22/07/2022 18:48, 周琰杰 (Zhou Yanjie) wrote:
>> Add the SFC bindings for the X1000 SoC, the X1600 SoC, the X1830 SoC,
>> and the X2000 SoC from Ingenic.
>>
>> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@...yeetech.com>
>> ---
>>   .../devicetree/bindings/spi/ingenic,sfc.yaml       | 64 ++++++++++++++++++++++
>>   1 file changed, 64 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/spi/ingenic,sfc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/spi/ingenic,sfc.yaml b/Documentation/devicetree/bindings/spi/ingenic,sfc.yaml
>> new file mode 100644
>> index 00000000..b7c4cf4
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/ingenic,sfc.yaml
>> @@ -0,0 +1,64 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/spi/ingenic,sfc.yaml#
> File name should be rather based on first compatible, so
> ingenic,x1000-sfc.yaml


No offense, does it really need to be named that way?
I can't seem to find documentation with instructions on this :(

The use of "ingenic,sfc.yaml" indicates that this is the documentation
for the SFC module for all Ingenic SoCs, without misleading people into
thinking it's only for a specific model of SoC. And there seem to be many
other yaml documents that use similar names (eg. fsl,spi-fsl-qspi.yaml,
spi-rockchip.yaml, spi-nxp-fspi.yaml, ingenic,spi.yaml, spi-sifive.yaml,
omap-spi.yaml), maybe these yaml files that are not named with first
compatible are also for the same consideration. :)


>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Bindings for SFC in Ingenic SoCs
>> +
>> +maintainers:
>> +  - 周琰杰 (Zhou Yanjie) <zhouyanjie@...yeetech.com>
>> +
>> +description:
>> +  The SPI Flash Controller in Ingenic SoCs.
>> +
> You miss here allOf referencing spi-controller.


Sure, will add it in the next version.


>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - enum:
>> +          - ingenic,x1000-sfc
>> +          - ingenic,x1600-sfc
>> +          - ingenic,x2000-sfc
>> +      - items:
>> +          - enum:
>> +              - ingenic,x1830-sfc
>> +          - const: ingenic,x1000-sfc
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  clock-names:
>> +    const: sfc
> Remove the clock-names entirely, no benefits.


Sure.


>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - interrupts
>> +  - clocks
>> +  - clock-names
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/ingenic,x1000-cgu.h>
>> +
>> +	sfc: spi@...40000 {
>> +		compatible = "ingenic,x1000-sfc";
>
> Use 4 spaces for example indentation.


My fault, will fix it in the next version.


>> +		reg = <0x13440000 0x1000>;
>> +
>> +		interrupt-parent = <&intc>;
>> +		interrupts = <7>;
>> +
>> +		clocks = <&cgu X1000_CLK_SFC>;
>> +		clock-names = "sfc";
>> +
>> +		status = "disabled";
> No status in example.


Sure, will remove it in the next version.


Thanks and beset regards!


>
>> +	};
>> +...
>
> Best regards,
> Krzysztof