linux-kernel - Re: [PATCH v2 1/4] dt-bindings: iio: hmc425a: add conditional GPIO array size constraints

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Date: Wed, 10 Jan 2024 16:17:45 +0000
From: Conor Dooley <conor@...nel.org>
To: Dumitru Ceclan <mitrutzceclan@...il.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>,
	Jonathan Cameron <jic23@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ceclan Dumitru <dumitru.ceclan@...log.com>
Subject: Re: [PATCH v2 1/4] dt-bindings: iio: hmc425a: add conditional GPIO
 array size constraints

On Wed, Jan 10, 2024 at 05:37:09PM +0200, Dumitru Ceclan wrote:
> ADRF5740 and HMC540S have a 4 bit parallel interface.
> Update ctr-gpios description and min/maxItems values depending on the
> matched compatible to correctly reflect the hardware properties.
> 
> Signed-off-by: Dumitru Ceclan <mitrutzceclan@...il.com>

Seems like you need a Fixes: tag, since the original binding was wrong?

> ---
>  .../bindings/iio/amplifiers/adi,hmc425a.yaml  | 33 +++++++++++++++++--
>  1 file changed, 30 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml
> index 67de9d4e3a1d..a434cb8ddcc9 100644
> --- a/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml
> +++ b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml
> @@ -33,11 +33,38 @@ properties:
>  
>    ctrl-gpios:
>      description:
> -      Must contain an array of 6 GPIO specifiers, referring to the GPIO pins
> -      connected to the control pins V1-V6.
> -    minItems: 6
> +      Must contain an array of GPIO specifiers, referring to the GPIO pins
> +      connected to the control pins.
> +        ADRF5740  - 4 GPIO connected to D2-D5
> +        HMC540S   - 4 GPIO connected to V1-V4
> +        HMC425A   - 6 GPIO connected to V1-V6
> +    minItems: 1
>      maxItems: 6
>  
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: adi,hmc425a
> +    then:
> +      properties:
> +        ctrl-gpios:
> +          minItems: 6

> +          maxItems: 6

This one should not be needed, it's already set by constraints on the
property above.

Acked-by: Conor Dooley <conor.dooley@...rochip.com>

> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            anyOf:
> +              - const: adi,adrf5740
> +              - const: adi,hmc540s
> +    then:
> +      properties:
> +        ctrl-gpios:
> +          minItems: 4
> +          maxItems: 4

I'd say this should be an else, but that clearly would just be churn
since your next patch adds something with a different set of
constraints.

Acked-by: Conor Dooley <conor.dooley@...rochip.com>

Cheers,
Conor.

> +
>  required:
>    - compatible
>    - ctrl-gpios
> -- 
> 2.42.0
> 

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