linux-kernel - Re: [PATCH] dt-bindings: iio: light: vishay,veml6075: make vdd-supply required

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Message-ID: <20240223-niece-shakily-7e18b90f30e7@spud>
Date: Fri, 23 Feb 2024 18:34:39 +0000
From: Conor Dooley <conor@...nel.org>
To: Javier Carrasco <javier.carrasco.cruz@...il.com>
Cc: Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	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
Subject: Re: [PATCH] dt-bindings: iio: light: vishay,veml6075: make
 vdd-supply required

On Fri, Feb 23, 2024 at 02:01:33PM +0100, Javier Carrasco wrote:
> The VEML6075 requires a single supply to operate. The property already
> exists in the bindings and it is used in the example, but it is still
> not on the list of required properties.
> 
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
> ---
> The driver and bindings for the VEML6075 UV sensor were merged in the
> merge window for v6.8 i.e. they have not been released yet beyond rc.
> 
> Applying this patch as a fix now would avoid an ABI break like the
> recently discussed here:
> 
> https://lore.kernel.org/linux-iio/8409a5bc71b995e3b738b817a074cfb131c3b2b5.camel@gmail.com/
> 
> On the other hand, from the same discussion it can be concluded that the
> major risk would be a potential warning with dtbs_check, in case this
> patch is applied during the next merge window.

I don't care if it introduces a dtbs_check problem, we can fix those.
The device clearly needs power and at least for linux it being missing
gets handled perfectly fine. I think it's pretty reasonable to do this.

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

Cheers,
Conor.

> 
> The VEML6075 driver already handles the power supply with
> devm_regulator_get_enable().
> ---
>  Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml b/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
> index abee04cd126e..91c318746bf3 100644
> --- a/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
> +++ b/Documentation/devicetree/bindings/iio/light/vishay,veml6075.yaml
> @@ -21,6 +21,7 @@ properties:
>  required:
>    - compatible
>    - reg
> +  - vdd-supply
>  
>  additionalProperties: false
>  
> 
> ---
> base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
> change-id: 20240223-veml6075_vdd-e2220158ffda
> 
> Best regards,
> -- 
> Javier Carrasco <javier.carrasco.cruz@...il.com>
> 

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