linux-kernel - Re: [PATCH v6 1/2] dt-bindings: serial: Add reg-io-width compatible

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Date:   Thu, 9 Apr 2020 17:09:59 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Hyunki Koo <hyunki00.koo@...sung.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 1/2] dt-bindings: serial: Add reg-io-width compatible

On Mon, Apr 6, 2020 at 5:09 PM Hyunki Koo <hyunki00.koo@...sung.com> wrote:
>
> Add a description for reg-io-width options for the samsung serial
> UART peripheral.
>
> Signed-off-by: Hyunki Koo <hyunki00.koo@...sung.com>
> ---
> v5: first added in this series
> v6: clean description of reg-io-width
> ---
>  Documentation/devicetree/bindings/serial/samsung_uart.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.yaml b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
> index 9d2ce347875b..1a0bb7619e2e 100644
> --- a/Documentation/devicetree/bindings/serial/samsung_uart.yaml
> +++ b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
> @@ -29,6 +29,12 @@ properties:
>    reg:
>      maxItems: 1
>
> +  reg-io-width:
> +    description:
> +      The size (in bytes) of the IO accesses that should be performed
> +      on the device. If omitted, default of 1 is used.
> +      - enum: [ 1, 4 ]

Can't this be implied by the compatible strings?

This isn't actual json-schema either with the enum under the
description. Run 'make dt_binding_check' before you send schemas.

There's a keyword for expressing the default value too. Hint: It's 'default'.

Rob