linux-kernel - Re: [PATCH 1/2] dt-bindings: regulator: Add binding for Richtek RT5759 DCDC converter

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Message-ID: <CADiBU3_06mCfBFXc5XAaeNd+G=Yf4MK5Ze429H8iUm=kpFMa5A@mail.gmail.com>
Date:   Fri, 25 Mar 2022 21:44:52 +0800
From:   ChiYuan Huang <u0084500@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        cy_huang <cy_huang@...htek.com>, gene_chen@...htek.com,
        lkml <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: regulator: Add binding for Richtek
 RT5759 DCDC converter

Krzysztof Kozlowski <krzk@...nel.org> 於 2022年3月25日 週五 下午8:14寫道：
>
> On 25/03/2022 02:06, cy_huang wrote:
> > From: ChiYuan Huang <cy_huang@...htek.com>
> >
> > Add bindings for Richtek RT5759 high-performance DCDC converter.
> >
> > Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
> > ---
> >  .../regulator/richtek,rt5759-regulator.yaml        | 90 ++++++++++++++++++++++
> >  1 file changed, 90 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5759-regulator.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5759-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5759-regulator.yaml
> > new file mode 100644
> > index 00000000..c24b583
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/regulator/richtek,rt5759-regulator.yaml
> > @@ -0,0 +1,90 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/regulator/richtek,rt5759-regulator.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Richtek RT5759 High Performance DCDC Concverter
>
> typo: Converter
>
Ack in next.
> > +
> > +maintainers:
> > +  - ChiYuan Huang <cy_huang@...htek.com>
> > +
> > +description: |
> > +  The RT5759 is a high-performance, synchronous step-down DC-DC converter that
> > +  can deliver up to 9A output current from 3V to 6.5V input supply, The output
> > +  voltage can be programmable with I2C controlled 7-Bit VID.
> > +
> > +  Datasheet is available at
> > +  https://www.richtek.com/assets/product_file/RT5759/DS5759-00.pdf
> > +
> > +allOf:
> > +  - $ref: regulator.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - richtek,rt5759
> > +      - richtek,rt5759a
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  regulator-allowed-modes:
> > +    description: |
> > +      buck allowed operating mode
> > +        0: auto mode (PSKIP: pulse skipping)
> > +        1: force pwm mode
> > +    items:
> > +      enum: [0, 1]
> > +
> > +  richtek,watchdog-enable:
> > +    description: enable the external watchdog reset pin listening
> > +    type: boolean
> > +
> > +if:
>
> This should be inside allOf. Move allOf here,
>
Ack in next.
> > +  properties:
> > +    compatible:
> > +      contains:
> > +        const: richtek,rt5759
> > +then:
> > +  properties:
> > +    richtek,watchdog-enable: false
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  # example 1 for RT5759
> > +  - |
> > +    i2c {
> > +      #address-cells = <1>;
> > +      #size-cells = <0>;
> > +
> > +      rt5759@62 {
>
> Generic node name, so pmic.
>
As my understanding, 'pmic' means there must be multiple channels of
buck or ldo.
But  rt5759 is only one channel buck converter.

> > +        compatible = "richtek,rt5759";
> > +        reg = <0x62>;
> > +        regulator-name = "rt5759-buck";
> > +        regulator-min-microvolt = <600000>;
> > +        regulator-max-microvolt = <1500000>;
> > +        regulator-boot-on;
> > +      };
> > +    };
> > +  # example 2 for RT5759A
> > +  - |
> > +    i2c {
> > +      #address-cells = <1>;
> > +      #size-cells = <0>;
> > +
> > +      rt5759a@62 {
>
> Ditto
>
> > +        compatible = "richtek,rt5759a";
> > +        reg = <0x62>;
> > +        regulator-name = "rt5759a-buck";
> > +        regulator-min-microvolt = <600000>;
> > +        regulator-max-microvolt = <1725000>;
> > +        regulator-boot-on;
> > +        richtek,watchdog-enable;
> > +      };
> > +    };
>
>
> Best regards,
> Krzysztof