linux-kernel - Re: [PATCH v1 1/2] dt-bindings: mfd: Add binding for MediaTek MT6363 series SPMI PMIC

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Message-ID: <20250625005130.GA2106374-robh@kernel.org>
Date: Tue, 24 Jun 2025 19:51:30 -0500
From: Rob Herring <robh@...nel.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: lee@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	matthias.bgg@...il.com, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v1 1/2] dt-bindings: mfd: Add binding for MediaTek MT6363
 series SPMI PMIC

On Mon, Jun 23, 2025 at 02:00:37PM +0200, AngeloGioacchino Del Regno wrote:
> Add a binding for the MediaTek MT6363/6373 (and similar) multi
> function PMICs connected over SPMI.
> 
> These PMICs are found on board designs using newer MediaTek SoCs,
> such as the Dimensity 9400 Smartphone chip, or the Chromebook
> MT8196 chip.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  .../bindings/mfd/mediatek,mt6363.yaml         | 98 +++++++++++++++++++
>  1 file changed, 98 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/mediatek,mt6363.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/mediatek,mt6363.yaml b/Documentation/devicetree/bindings/mfd/mediatek,mt6363.yaml
> new file mode 100644
> index 000000000000..2ce57e659d12
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/mediatek,mt6363.yaml
> @@ -0,0 +1,98 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/mediatek,mt6363.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek MT6363 series SPMI PMICs multi-function device
> +
> +maintainers:
> +  - AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> +
> +description: |
> +  Some MediaTek Power Management ICs (PMICs) found in board designs with
> +  the Helio, Dimensity and/or Kompanio series of SoCs are interfaced to
> +  the chip via the System Power Management Interface (SPMI) bus.
> +
> +  These PMICs are multi-function devices with various sub modules.
> +  For example, those may include one, or more of the following:
> +  - Auxiliary ADC Controller
> +  - Clock Controller
> +  - eFuses
> +  - GPIO Controller
> +  - Interrupt Controller
> +  - Keys
> +  - LEDs Controller
> +  - Regulators
> +  - RTC
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - mediatek,mt6363
> +          - mediatek,mt6373
> +
> +  reg:
> +    maxItems: 1
> +
> +  '#address-cells':
> +    const: 0
> +
> +  '#size-cells':
> +    const: 0
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  interrupt-controller: true
> +
> +  "#interrupt-cells":
> +    const: 3
> +
> +  adc:
> +    type: object
> +    $ref: /schemas/iio/adc/mediatek,mt6359-auxadc.yaml#
> +    unevaluatedProperties: false
> +
> +  regulators:
> +    type: object
> +    oneOf:
> +      - $ref: /schemas/regulator/mediatek,mt6363-regulator.yaml#
> +      - $ref: /schemas/regulator/mediatek,mt6373-regulator.yaml#

This causes the schemas to be applied 4 times (2 each). Better if you 
do:

properties:
  compatible:
    contains:
      enum: [ the compatibles in those schemas ]


> +    additionalProperties: true
> +
> +  keys:
> +    type: object
> +    $ref: /schemas/input/mediatek,pmic-keys.yaml
> +    unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - '#address-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/spmi/spmi.h>
> +
> +    spmi {
> +      #address-cells = <2>;
> +      #size-cells = <0>;
> +
> +      pmic@4 {
> +        compatible = "mediatek,mt6363";
> +        reg = <0x4 SPMI_USID>;
> +        interrupts = <4 64 IRQ_TYPE_LEVEL_HIGH>;
> +        interrupt-controller;
> +        #address-cells = <0>;
> +        #interrupt-cells = <3>;
> +
> +        regulators {
> +            compatible = "mediatek,mt6363-regulator";
> +        };

Make the example complete. with adc and keys nodes.

> +      };
> +    };
> -- 
> 2.49.0
>