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Date:   Sat, 2 May 2020 15:51:58 +0200
From:   Lukas Wunner <lukas@wunner.de>
To:     Heiko Stuebner <heiko@sntech.de>
Cc:     gregkh@linuxfoundation.org, jslaby@suse.com,
        andriy.shevchenko@linux.intel.com, matwey.kornilov@gmail.com,
        linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
        christoph.muellner@theobroma-systems.com,
        giulio.benetti@micronovasrl.com,
        Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Subject: Re: [PATCH v2 5/7] dt-bindings: serial: Add binding for rs485
 receiver enable GPIO
Message-ID: <20200502135158.zphroi533ocualot@wunner.de>
References: <20200325231422.1502366-1-heiko@sntech.de>
 <20200325231422.1502366-6-heiko@sntech.de>
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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