linux-kernel - Re: [PATCH 02/23] dt-bindings: gpio: nomadik: add optional ngpios property

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Message-ID: <CACRpkdawXwae7GKf4zOfVUJPLgLOeEX-8w5fbnr8O6FXuZHuaw@mail.gmail.com>
Date: Mon, 19 Feb 2024 15:50:59 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: Théo Lebrun <theo.lebrun@...tlin.com>
Cc: Bartosz Golaszewski <brgl@...ev.pl>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Philipp Zabel <p.zabel@...gutronix.de>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-mips@...r.kernel.org, Gregory CLEMENT <gregory.clement@...tlin.com>, 
	Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>, 
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Tawfik Bayouk <tawfik.bayouk@...ileye.com>
Subject: Re: [PATCH 02/23] dt-bindings: gpio: nomadik: add optional ngpios property

On Wed, Feb 14, 2024 at 5:24 PM Théo Lebrun <theo.lebrun@...tlin.com> wrote:

> This GPIO controller can support a lesser number of GPIOs than 32.
> Express that in devicetree using an optional, generic property.
>
> Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
> ---
>  Documentation/devicetree/bindings/gpio/st,nomadik-gpio.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/gpio/st,nomadik-gpio.yaml b/Documentation/devicetree/bindings/gpio/st,nomadik-gpio.yaml
> index a999908173d2..bbd23daed229 100644
> --- a/Documentation/devicetree/bindings/gpio/st,nomadik-gpio.yaml
> +++ b/Documentation/devicetree/bindings/gpio/st,nomadik-gpio.yaml
> @@ -50,6 +50,10 @@ properties:
>    gpio-ranges:
>      maxItems: 1
>
> +  ngpios:
> +    minimum: 0
> +    maximum: 32

I can't help but wonder what good is ngpios = <0>; but OK.
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij