linux-kernel - Re: [PATCH v2 1/6] dt-bindings: regulator: Document MediaTek MT6316 PMIC Regulators

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Message-ID: <20250627-premium-clay-husky-9d32bc@krzk-bin>
Date: Fri, 27 Jun 2025 10:16:52 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: broonie@...nel.org, lgirdwood@...il.com, robh@...nel.org, 
	krzk+dt@...nel.org, conor+dt@...nel.org, matthias.bgg@...il.com, 
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-mediatek@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v2 1/6] dt-bindings: regulator: Document MediaTek MT6316
 PMIC Regulators

On Tue, Jun 24, 2025 at 09:35:43AM +0200, AngeloGioacchino Del Regno wrote:
> Add bindings for the regulators found in the MediaTek MT6316 PMIC,
> usually found in board designs using the MT6991 Dimensity 9400 and
> on MT8196 Kompanio SoC for Chromebooks.
> 
> This chip is fully controlled by SPMI and has multiple variants
> providing different phase configurations.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  .../regulator/mediatek,mt6316-regulator.yaml  | 81 +++++++++++++++++++
>  1 file changed, 81 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/regulator/mediatek,mt6316-regulator.yaml
> 
> diff --git a/Documentation/devicetree/bindings/regulator/mediatek,mt6316-regulator.yaml b/Documentation/devicetree/bindings/regulator/mediatek,mt6316-regulator.yaml
> new file mode 100644
> index 000000000000..019c3c36997c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/mediatek,mt6316-regulator.yaml
> @@ -0,0 +1,81 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/regulator/mediatek,mt6316-regulator.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek MT6316 SPMI PMIC Regulators
> +
> +maintainers:
> +  - AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> +
> +description: |
> +  The MediaTek MT6316 PMIC is fully controlled by SPMI interface; it features
> +  four step-down DC/DC (buck) converters and has multiple variants, providing
> +  different phase configurations. In particular:
> +  MT6316BP/VP:    2+2 Phase (buck 1+2, buck 3+4)
> +  MT6316CP/HP/KP: 3+1 Phase (buck 1+2+4, buck 3)
> +  MT6316DP/TP:    4+0 Phase (buck 1+2+3+4)
> +
> +properties:
> +  compatible:
> +    enum:
> +      - mediatek,mt6316b-regulator
> +      - mediatek,mt6316c-regulator
> +      - mediatek,mt6316d-regulator
> +
> +  vbuck1234:
> +    type: object
> +    $ref: regulator.yaml#
> +    unevaluatedProperties: false
> +

Here you define all regulators

> +additionalProperties: false

This goes to the end.

> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          const: mediatek,mt6316b-regulator
> +    then:
> +      patternProperties:
> +        "^vbuck(12|34)$":

Every device has different regulators, so there is little benefit in
keeping this in one schema file.

Best regards,
Krzysztof