On Mon, Apr 20, 2026 at 07:22:57AM +0000, Billy Tsai wrote:
> In particular, I'll split the constraints as follows:
> 
> - For pinmux, the presence of `function` will require `groups`, and
>   `pins` will not be allowed. This reflects the hardware design, where
>   the groups are defined by the pins affected by a given mux expression
> 
> - For pin configuration, exactly one of `groups` or `pins` will be
>   required (using oneOf), so that configuration is applied either at
>   group level or per-pin, but not both.
> 
> 
> - if:
>     required:
>       - function
>   then:
>     required:
>       - groups
>     not:
>       required:
>         - pins

>   else:

I think this is a separate section under an allOf, rather than an else.
You can also simplify the condition above to just be
- if:
    required:
      - function
  then:
    required:
      - groups
since the node will then always be tested against what you have below

>     oneOf:
>       - required:
>           - groups
>         not:
>           required:
>             - pins
>       - required:
>           - pins
>         not:
>           required:
>             - groups

I think this here simplifies to
oneOf:
  - required:
     - groups
  - required:
     - pins

You'd also need to note that pin level config settings should take
precedence over group level ones.