Re: [PATCH] dt-bindings: mfd: mediatek,mt6357: Fixup reference to pwrap node

[Krzysztof Kozlowski <krzk@kernel.org>]

On 26/08/2024 08:54, Macpaul Lin wrote:
> The mt6357 is a subnode of pwrap node. Previously, the documentation
> only included a note in the description of mt6357. This change adds the
> appropriate $ref for pwrap to ensure clarity and correctness.

Heh? The schema described mt6357, not pwrap. Why are you changing it?

> 
>   $ref: /schemas/soc/mediatek/mediatek,pwrap.yaml
> 
> Additionally, the indentation for the pmic section has been adjusted
> to match the corresponding structure.
> 
> Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
> ---
>  .../bindings/mfd/mediatek,mt6357.yaml         | 124 +++++++++---------
>  1 file changed, 65 insertions(+), 59 deletions(-)
> 
> Changes for v1:
>  - This patch has been made based on linux-next/master branch.
> 
> diff --git a/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml b/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
> index b67fbe0..5f4f540 100644
> --- a/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
> +++ b/Documentation/devicetree/bindings/mfd/mediatek,mt6357.yaml
> @@ -22,69 +22,75 @@ description: |
>  
>    It is interfaced to host controller using SPI interface by a proprietary hardware
>    called PMIC wrapper or pwrap. This MFD is a child device of pwrap.
> -  See the following for pwrap node definitions:
> -  Documentation/devicetree/bindings/soc/mediatek/mediatek,pwrap.yaml
>  
>  properties:
> -  compatible:
> -    const: mediatek,mt6357

How does this schema is being selected without compatible?

> -
> -  interrupts:
> -    maxItems: 1
> -
> -  interrupt-controller: true
> -
> -  "#interrupt-cells":
> -    const: 2
> -
> -  mediatek,hp-pull-down:
> -    description:
> -      Earphone driver positive output stage short to
> -      the audio reference ground.
> -    type: boolean
> -
> -  mediatek,micbias0-microvolt:
> -    description: Selects MIC Bias 0 output voltage.
> -    enum: [1700000, 1800000, 1900000, 2000000,
> -           2100000, 2500000, 2600000, 2700000]
> -    default: 1700000
> -
> -  mediatek,micbias1-microvolt:
> -    description: Selects MIC Bias 1 output voltage.
> -    enum: [1700000, 1800000, 1900000, 2000000,
> -           2100000, 2500000, 2600000, 2700000]
> -    default: 1700000
> -
> -  regulators:
> -    type: object
> -    $ref: /schemas/regulator/mediatek,mt6357-regulator.yaml
> -    unevaluatedProperties: false
> -    description:
> -      List of MT6357 BUCKs and LDOs regulators.
> -
> -  rtc:
> +  pwrap:

With the diff it is tricky to say what you are doing, but it feels
wrong. I don't understand the rationale, the problem being fixed here,
and considering unusual diff, this just looks wrong approach.

Bindings do not work like that - you do not reference the parent inside
the child. There is nowhere example for that, so I have no clue how did
you come up with it.

Best regards,
Krzysztof