linux-kernel - Re: [PATCH v6 5/9] dt-bindings: regulator: Document MediaTek MT6373 PMIC Regulators

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Message-ID: <20251001155300.GC1833526-robh@kernel.org>
Date: Wed, 1 Oct 2025 10:53:00 -0500
From: Rob Herring <robh@...nel.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: linux-mediatek@...ts.infradead.org, lee@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, matthias.bgg@...il.com, lgirdwood@...il.com,
	broonie@...nel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kernel@...labora.com, wenst@...omium.org,
	igor.belwon@...tallysanemainliners.org
Subject: Re: [PATCH v6 5/9] dt-bindings: regulator: Document MediaTek MT6373
 PMIC Regulators

On Wed, Oct 01, 2025 at 01:13:12PM +0200, AngeloGioacchino Del Regno wrote:
> Add bindings for the regulators found in the MediaTek MT6363 PMIC,
> usually found in board designs using the MT6991 Dimensity 9400 and
> on MT8196 Kompanio SoC for Chromebooks, along with the MT6316 and
> MT6363 PMICs.
> 
> Link: https://lore.kernel.org/r/20250715140224.206329-6-angelogioacchino.delregno@collabora.com
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  .../regulator/mediatek,mt6373-regulator.yaml  | 137 ++++++++++++++++++
>  1 file changed, 137 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/regulator/mediatek,mt6373-regulator.yaml
> 
> diff --git a/Documentation/devicetree/bindings/regulator/mediatek,mt6373-regulator.yaml b/Documentation/devicetree/bindings/regulator/mediatek,mt6373-regulator.yaml
> new file mode 100644
> index 000000000000..cb721d81b77c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/mediatek,mt6373-regulator.yaml
> @@ -0,0 +1,137 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/regulator/mediatek,mt6373-regulator.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek MT6373 PMIC Regulators
> +
> +maintainers:
> +  - AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> +
> +description:
> +  The MT6373 SPMI PMIC provides 10 BUCK and 23 LDO (Low DropOut) regulators
> +  and can optionally provide overcurrent warnings with one ocp interrupt
> +  for each voltage regulator.
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt6373-regulator
> +
> +  reg:
> +    maxItems: 1
> +
> +  vsys-vbuck0-supply:
> +    description: Input supply for vbuck0
> +
> +  vsys-vbuck1-supply:
> +    description: Input supply for vbuck1
> +
> +  vsys-vbuck2-supply:
> +    description: Input supply for vbuck2
> +
> +  vsys-vbuck3-supply:
> +    description: Input supply for vbuck3
> +
> +  vsys-vbuck4-supply:
> +    description: Input supply for vbuck4
> +
> +  vsys-vbuck5-supply:
> +    description: Input supply for vbuck5
> +
> +  vsys-vbuck6-supply:
> +    description: Input supply for vbuck6
> +
> +  vsys-vbuck7-supply:
> +    description: Input supply for vbuck7
> +
> +  vsys-vbuck8-supply:
> +    description: Input supply for vbuck8
> +
> +  vsys-vbuck9-supply:
> +    description: Input supply for vbuck9
> +
> +  vs1-ldo1-supply:
> +    description: Input supply for vant18, vaud18, vcn18io
> +
> +  vs2-ldo1-supply:
> +    description: Input supply for vrf12-aif, vrf13-aif
> +
> +  vs3-ldo1-supply:
> +    description: Input supply for vrf09-aif, vsram-digrf-aif
> +
> +  vsys-ldo1-supply:
> +    description: Input supply for vcn33-1, vcn33-2, vmc
> +
> +  vsys-ldo2-supply:
> +    description:
> +      Input supply for vaux18, vcn33-3, vefuse, vfp, vibr, vio28, vtp, vusb
> +
> +  vsys-ldo3-supply:
> +    description: Input supply for vmch, vmch-eint-high/low
> +
> +patternProperties:
> +  "^v(ant|aud|aux)18$":
> +    $ref: "#/$defs/mediatek-mt6373-ldo-common"
> +
> +  "^vbuck([0-9])$":

Don't need ().

> +    type: object
> +    $ref: regulator.yaml#
> +    properties:
> +      regulator-allowed-modes:
> +        description: |
> +          Allowed Buck regulator operating modes allowed. Valid values below.
> +            0 - Normal mode with automatic power saving, reducing the switching
> +                frequency when light load conditions are detected
> +            1 - Forced Continuous Conduction mode (FCCM) for improved voltage
> +                regulation accuracy with constant switching frequency but lower
> +                regulator efficiency
> +            2 - Forced Low Power mode for improved regulator efficiency, used
> +                when no heavy load is expected, does not limit the maximum out
> +                current but unless only a light load is applied, there will be
> +                regulation accuracy and efficiency losses.
> +            3 - Forced Ultra Low Power mode for ultra low load, this greatly
> +                reduces the maximum output power, makes the regulator to be
> +                efficient only for ultra light load, and greatly reduces the
> +                quiescent current (Iq) of the buck.
> +        maxItems: 3
> +        items:
> +          enum: [ 0, 1, 2, 3 ]
> +    unevaluatedProperties: false
> +
> +  "^v(cn18io|cn33-[123]|efuse|fp|tp|ibr|io28|sram-digrf-aif|usb)":

Missing '$' anchor.

> +    $ref: "#/$defs/mediatek-mt6373-ldo-common"
> +
> +  "^vmc(h)?$":

Don't need ().

> +    $ref: "#/$defs/mediatek-mt6373-ldo-common"
> +
> +  "^vmch-eint-(low|high)?$":

vmch-eint- is a valid name?

> +    $ref: "#/$defs/mediatek-mt6373-ldo-common"
> +
> +  "^vrf(09|12|13|18|io18)-aif$":
> +    $ref: "#/$defs/mediatek-mt6373-ldo-common"
> +
> +$defs:
> +  mediatek-mt6373-ldo-common:

The name is local to the schema, so 'ldo-common' would be sufficient.

> +    type: object
> +    $ref: regulator.yaml#
> +    unevaluatedProperties: false
> +    properties:
> +      regulator-allowed-modes:
> +        description: |
> +          Allowed LDO regulator operating modes allowed. Valid values below.
> +            0 - Normal mode with automatic power saving, reducing the switching
> +                frequency when light load conditions are detected
> +            2 - Forced Low Power mode for improved regulator efficiency, used
> +                when no heavy load is expected, does not limit the maximum out
> +                current but unless only a light load is applied, there will be
> +                regulation accuracy and efficiency losses.
> +        maxItems: 2
> +        items:
> +          enum: [ 0, 2 ]
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> -- 
> 2.51.0
>