On Sat, Jun 30, 2018 at 07:22:40PM +0200, Jerome Brunet wrote:

> +Optional properties:
> +- VDDP-supply: regulator phandle for the VDDA supply
> +- VDDA-supply: regulator phandle for the VDDP supply
> +- VDDD-supply: regulator phandle for the VDDD supply

Same issue as with the other binding: power isn't optional in the
hardware so shouldn't be optional in the binding.