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

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Date: Sat, 24 Feb 2024 19:18:43 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Conor Dooley <conor@...nel.org>
Cc: Javier Carrasco <javier.carrasco.cruz@...il.com>, 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, 23 Feb 2024 18:34:39 +0000
Conor Dooley <conor@...nel.org> wrote:

> 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>
> 
Applied to the togreg branch of iio.git and pushed out as testing.

Jonathan

> 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>
> >