linux-kernel - Re: [PATCH v2 1/5] dt-bindings: input: Increase maximum keycode value to 0x2ff

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Date:   Thu, 9 Jun 2022 07:46:51 +0200
From:   Heinrich Schuchardt <xypron.glpk@....de>
To:     Rob Herring <robh@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Hans de Goede <hdegoede@...hat.com>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Artur Rojek <contact@...ur-rojek.eu>,
        Maxime Ripard <mripard@...nel.org>,
        Jeff LaBundy <jeff@...undy.com>, linux-input@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] dt-bindings: input: Increase maximum keycode value
 to 0x2ff

On 6/8/22 23:12, Rob Herring wrote:
> The maximum keycode value for Linux is 0x2ff, not 0xff. There's already
> users and examples with values greater than 0xff, but the schema is not
> yet applied in those cases.
>
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
>   Documentation/devicetree/bindings/input/input.yaml | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/input/input.yaml b/Documentation/devicetree/bindings/input/input.yaml
> index d41d8743aad4..43d2f299c332 100644
> --- a/Documentation/devicetree/bindings/input/input.yaml
> +++ b/Documentation/devicetree/bindings/input/input.yaml
> @@ -21,7 +21,7 @@ properties:
>       $ref: /schemas/types.yaml#/definitions/uint32-array
>       items:
>         minimum: 0
> -      maximum: 0xff
> +      maximum: 0x2ff

Can this value of 0x2ff be make exportable such that we can use it as a
reference in devicetree/bindings/input/adc-keys.yaml. E.g. define a type
that only take values in the 0-0x2ff range?

Best regards

Heinrich

>
>     poll-interval:
>       description: Poll interval time in milliseconds.