On Thu, Mar 26, 2020 at 12:14:20AM +0100, Heiko Stuebner wrote: > --- a/Documentation/devicetree/bindings/serial/rs485.yaml > +++ b/Documentation/devicetree/bindings/serial/rs485.yaml > @@ -44,6 +44,10 @@ properties: > description: enables the receiving of data even while sending data. > $ref: /schemas/types.yaml#/definitions/flag > > + rs485-rx-enable-gpios: > + description: GPIO to handle a separate RS485 receive enable signal > + $ref: /schemas/types.yaml#/definitions/flag > + This isn't a flag, so you need the "maxItems: 1" line instead, as you correctly did below: > rs485-term-gpios: > description: GPIO pin to enable RS485 bus termination. > maxItems: 1