linux-kernel - Re: [PATCH 1/2] dt-bindings: input: gpio-keys: Allow optional dedicated wakeirq

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Message-ID: <20230811151048.GA3452914-robh@kernel.org>
Date:   Fri, 11 Aug 2023 09:10:48 -0600
From:   Rob Herring <robh@...nel.org>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] dt-bindings: input: gpio-keys: Allow optional
 dedicated wakeirq

On Fri, Aug 11, 2023 at 02:04:31PM +0300, Tony Lindgren wrote:
> Allow configuring optional dedicated wakeirq that some SoCs have.
> Let's use the interrupt naming "irq" and "wakeup" that we already have
> in use for some drivers and subsystems like i2c.
> 
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> ---
>  .../devicetree/bindings/input/gpio-keys.yaml      | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/input/gpio-keys.yaml b/Documentation/devicetree/bindings/input/gpio-keys.yaml
> --- a/Documentation/devicetree/bindings/input/gpio-keys.yaml
> +++ b/Documentation/devicetree/bindings/input/gpio-keys.yaml
> @@ -31,7 +31,17 @@ patternProperties:
>          maxItems: 1
>  
>        interrupts:
> -        maxItems: 1
> +        description:
> +          Optional interrupts if different from the gpio interrupt
> +        maxItems: 2
> +
> +      interrupt-names:
> +        description:
> +	  Optional interrupt names, can be used to specify a separate
> +	  dedicated wake-up interrupt
> +        items:
> +          -const: irq
> +          -const: wakeup

Also need a space after '-'.

>  
>        label:
>          description: Descriptive name of the key.
> @@ -130,6 +140,9 @@ examples:
>              label = "GPIO Key UP";
>              linux,code = <103>;
>              gpios = <&gpio1 0 1>;
> +            interrupts-extended = <&intc_wakeup 0 IRQ_TYPE_LEVEL_HIGH>;
> +            interrupt-names = "wakeup";

That's not what your schema allows. You need:

minItems: 1
items:
  - enum: [ irq, wakeup ]
  - const: wakeup

(repeating 'wakeup' is disallowed globally for ".*-names".)

> +            wakeup-source;

Of course with this, a single interrupt is the wake-up source and 
doesn't need a name. So you could define that 'interrupt-names' is only 
used when there are 2 interrupts. In that case, the schema is right and 
the example is wrong.

Rob