On Wed, Mar 17, 2021 at 9:26 AM Sai Krishna Potthuri
[off-list ref] wrote:

+          io-standard:
+            description:
+              Selects the IO standard for MIO pins, this is driver specific.
+            $ref: "/schemas/types.yaml#/definitions/uint32"
+            enum: [0, 1]

As concluded from driver review, replace this with
power-source  which is already defined in
Documentation/devicetree/bindings/pinctrl/pincfg-node.yaml

Yours,
Linus Walleij