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

[Jonathan Cameron <jic23@kernel.org>]

On Mon, 11 May 2026 23:13:27 +0530
Piyush Patle <piyushpatle228@gmail.com> wrote:

> Document the optional VSUP supply used by the HX711 on-chip regulator.
> 
> Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> ---

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.

>  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