Re: [PATCH 1/2] dt-bindings: wkup-m3-ipc: Add vtt toggle bindings

[Krzysztof Kozlowski]

On 09/04/2022 06:51, Drew Fustini wrote:
> Document the Wakeup M3 IPC properties that can be used to toggle the VTT
> regulator during low power mode transitions.
>

(...)

> @@ -51,6 +61,15 @@ properties:
>        mbox_wkupm3 child node.
>      maxItems: 1
>  
> +  ti,needs-vtt-toggle:
> +    type: boolean
> +    description: boards requires VTT toggling during suspend/resume
> +
> +  ti,vtt-gpio-pin:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description: pin on the GPIO0 module used for VTT toggle
> +    maxItems: 1

No need for maxItems, it's a single uint32. You could add "maximum" if
you know the constraints for the value.

Do you actually need two properties (bool + pin)? A case of
"ti,vtt-gpio-pin" without the "ti,needs-vtt-toggle" is valid?

The other way looks wrong, so you need to add a dependency (see
example-schema).


Best regards,
Krzysztof