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

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Message-ID: <6d5553da-4c0e-4957-8d74-314a9ef23301@collabora.com>
Date: Thu, 2 Oct 2025 09:47:41 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Rob Herring <robh@...nel.org>
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

Il 01/10/25 17:53, Rob Herring ha scritto:
> 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?
> 

Whoops. No, that was supposed to allow vmch-eint-low, vmch-eint-high.

>> +    $ref: "#/$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.
> 

Okay, I was trying to avoid pollution - but effectively being this local it's not
necessary to make this name that long.

Will come up with a v7 sooner than later.

Thanks!
Angelo

>> +    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
>>