Re: [PATCH v3 4/7] dt-bindings: clock: mediatek: Add clock driver bindings for MT6795

[Krzysztof Kozlowski]

On 26/06/2022 11:47, David Heidelberg wrote:
> On 25/06/2022 22:29, Krzysztof Kozlowski wrote:
>> On 24/06/2022 11:35, AngeloGioacchino Del Regno wrote:
>>> Add the bindings for the clock drivers of the MediaTek Helio X10
>>> MT6795 SoC.
>>>
>>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
>>> ---
>>>   .../bindings/clock/mediatek,mt6795-clock.yaml | 66 +++++++++++++++++
>>>   .../clock/mediatek,mt6795-sys-clock.yaml      | 74 +++++++++++++++++++
>>>   2 files changed, 140 insertions(+)
>>>   create mode 100644 Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml
>>>   create mode 100644 Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml b/Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml
>>> new file mode 100644
>>> index 000000000000..795fb18721c3
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml
>>> @@ -0,0 +1,66 @@
>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: "http://devicetree.org/schemas/clock/mediatek,mt6795-clock.yaml#";
>>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#";
>>> +
>>> +title: MediaTek Functional Clock Controller for MT6795
>>> +
>>> +maintainers:
>>> +  - AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
>>> +  - Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
>>> +
>>> +description: |
>>> +  The clock architecture in MediaTek like below
>>> +  PLLs -->
>>> +          dividers -->
>>> +                      muxes
>>> +                           -->
>>> +                              clock gate
>>> +
>>> +  The devices provide clock gate control in different IP blocks.
>>> +
>>> +properties:
>>> +  compatible:
>>> +    enum:
>>> +      - mediatek,mt6795-mfgcfg
>>> +      - mediatek,mt6795-vdecsys
>>> +      - mediatek,mt6795-vencsys
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +
>>> +  '#clock-cells':
>>> +    const: 1
>>> +
>>> +required:
>>> +  - compatible
>>> +  - reg
>>> +  - '#clock-cells'
>>> +
>>> +additionalProperties: false
>>> +
>>> +examples:
>>> +  - |
>>> +    soc {
>>> +        #address-cells = <2>;
>>> +        #size-cells = <2>;
>>> +
>>> +        mfgcfg: clock-controller@13000000 {
>>> +            compatible = "mediatek,mt6795-mfgcfg";
>>> +            reg = <0 0x13000000 0 0x1000>;
>>> +            #clock-cells = <1>;
>>> +        };
>>> +
>>> +        vdecsys: clock-controller@16000000 {
>>> +            compatible = "mediatek,mt6795-vdecsys";
>>> +            reg = <0 0x16000000 0 0x1000>;
>>> +            #clock-cells = <1>;
>>> +        };
>>> +
>>> +        vencsys: clock-controller@18000000 {
>>> +            compatible = "mediatek,mt6795-vencsys";
>>> +            reg = <0 0x18000000 0 0x1000>;
>>> +            #clock-cells = <1>;
>>> +        };
>>> +    };
>>> diff --git a/Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml b/Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml
>>> new file mode 100644
>>> index 000000000000..44b96af9ceaf
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml
>>> @@ -0,0 +1,74 @@
>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: "http://devicetree.org/schemas/clock/mediatek,mt6795-sys-clock.yaml#";
>>> +$schema: "http://devicetree.org/meta-schemas/core.yaml#";
>>> +
>>> +title: MediaTek System Clock Controller for MT6795
>>> +
>>> +maintainers:
>>> +  - AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
>>> +  - Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
>>> +
>>> +description:
>>> +  The Mediatek system clock controller provides various clocks and system configuration
>> Wrap according to Linux coding convention, so at 80.
> 
> What I understood that 100 length was agreed [1] as a limit. I haven't 
> noticed any recent change regarding to line length.
> 
> [1] 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bdc48fa11e46f867ea4d75fa59ee87a7f48be144

The coding style (also in change above) clearly states:
"The preferred limit on the length of a single line is 80 columns."
Just read the first line of new diff/hunk...

checkpatch was indeed long time converted not to complain on 80 but on
100, but that does not change coding style. The point of that was only
to accept 100 wrapping when it is beneficial,  iow, it increases the
code readability.

It's not the case here and coding style clearly asks for 80. Wrap at 80.


Best regards,
Krzysztof