Re: [PATCH v8 v8 02/11] dt-bindings: iio: adc: hx711: add VSUP supply property

[Jonathan Cameron]

On Tue, 12 May 2026 13:06:22 +0100
Jonathan Cameron <jic23@xxxxxxxxxx> wrote:

> On Mon, 11 May 2026 23:13:27 +0530
> Piyush Patle <piyushpatle228@xxxxxxxxx> wrote:
> 
> > Document the optional VSUP supply used by the HX711 on-chip regulator.
> > 
> > Signed-off-by: Piyush Patle <piyushpatle228@xxxxxxxxx>
> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>
> > Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> > ---  
> 
> I got curious given the driver doesn't yet turn this on and wanted
> to just sanity check it via a datasheet.
> 
> Why are we including this one but not dvdd-supply?  The suggested
> wiring does connect them to the same supply but it's external to the
> chip so in theory they might not be.  Curiously dvdd supply is allowed
> to be 0.1 V lower than vsup-supply.

I should have said, given there is nothing wrong with what you have here
and the above is a possible additional change - applied to the testing
branch of iio.git.

Thanks,

Jonathan

> 
> >  Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml b/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml
> > index 1ea60dff98d5..a8eaa1f18de5 100644
> > --- a/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml
> > +++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml
> > @@ -33,6 +33,10 @@ properties:
> >      description:
> >        Analog supply voltage (AVDD).
> >  
> > +  vsup-supply:
> > +    description:
> > +      Supply voltage for the on-chip regulator (VSUP).
> > +
> >    clock-frequency:
> >      description:
> >        Controls the SCK bit-bang timing. The value is used to derive the  
>