Re: [RFC PATCH 3/5] dt-bindings: input: add entry for 88pm88x-onkey

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On Sun, Dec 17, 2023 at 02:17:01PM +0100, Karel Balej wrote:
> From: Karel Balej <balejk@xxxxxxxxx>
> 
> Marvell 88PM88X PMICs provide onkey functionality. Document it.
> 
> Signed-off-by: Karel Balej <balejk@xxxxxxxxx>
> ---
>  .../bindings/input/marvell,88pm88x-onkey.yaml | 30 +++++++++++++++++++
>  .../bindings/mfd/marvell,88pm88x.yaml         |  4 +++
>  2 files changed, 34 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/marvell,88pm88x-onkey.yaml
> 
> diff --git a/Documentation/devicetree/bindings/input/marvell,88pm88x-onkey.yaml b/Documentation/devicetree/bindings/input/marvell,88pm88x-onkey.yaml
> new file mode 100644
> index 000000000000..aeb7673189f8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/marvell,88pm88x-onkey.yaml
> @@ -0,0 +1,30 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/input/marvell,88pm88x-onkey.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Onkey driver for Marvell 88PM88X PMICs.
> +
> +maintainers:
> +  - Karel Balej <balejk@xxxxxxxxx>
> +
> +description: |
> +  This module is part of the 88PM88X MFD device. For more details
> +  see Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml.
> +
> +  The onkey controller is represented as a sub-node of the PMIC node in
> +  the device tree.
> +
> +allOf:
> +  - $ref: input.yaml#
> +
> +properties:
> +  compatible:
> +    const: marvell,88pm88x-onkey
> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +...
> diff --git a/Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml b/Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml
> index e075729c360f..115b41c9f22c 100644
> --- a/Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml
> +++ b/Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml
> @@ -50,6 +50,10 @@ examples:
>          interrupt-parent = <&gic>;
>          interrupt-controller;
>          #interrupt-cells = <1>;
> +
> +        onkey {
> +          compatible = "marvell,88pm88x-onkey";
> +        };

Why do you need this? You have no properties for it. The parent driver 
can instantiate child drivers. You don't need a DT node for that.

Rob




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