Re: [PATCH v2 1/2] dt-bindings: iio: adc: add maxim,max40080

[Conor Dooley <conor@kernel.org>]

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On Mon, Jul 13, 2026 at 03:02:25PM +0300, Stefan Popa wrote:
> Add device tree bindings for the Maxim MAX40080 bidirectional
> current-sense amplifier with a 12-bit ADC and an I2C/SMBus interface.
> 
> Signed-off-by: Stefan Popa <stefan.popa@analog.com>
> ---
>  .../bindings/iio/adc/maxim,max40080.yaml      | 62 +++++++++++++++++++
>  1 file changed, 62 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml b/Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml
> new file mode 100644
> index 0000000000000..8a57075a7d273
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/maxim,max40080.yaml
> @@ -0,0 +1,62 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/maxim,max40080.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim MAX40080 bidirectional current-sense amplifier
> +
> +maintainers:
> +  - Ciprian Hegbeli <ciprian.hegbeli@analog.com>
> +  - Stefan Popa <stefan.popa@analog.com>
> +
> +description: |
> +  The MAX40080 is a high-precision, bidirectional current-sense amplifier with
> +  an integrated 12-bit ADC and an I2C/SMBus interface. It measures the voltage
> +  across an external shunt resistor and the input bus voltage, and stores the
> +  results in an internal FIFO.
> +
> +  Datasheet:
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/MAX40080.pdf
> +
> +properties:
> +  compatible:
> +    const: maxim,max40080
> +
> +  reg:
> +    maxItems: 1
> +
> +  vdd-supply:
> +    description: Power supply for the device.
> +
> +  interrupts:
> +    maxItems: 1
> +    description: ALERT output for overcurrent/undervoltage threshold events.
> +
> +  "#io-channel-cells":
> +    const: 1
> +
> +  shunt-resistor-micro-ohms:
> +    description:
> +      Value of the current-sense shunt resistor connected between the IN+ and
> +      IN- inputs. Used to scale the reported current.
> +
> +required:
> +  - compatible
> +  - reg

The supply should be made required.
pw-bot: changes-requested

Otherwise, this seems okay.

Cheers,
Conor.

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        adc@20 {
> +            compatible = "maxim,max40080";
> +            reg = <0x20>;
> +            #io-channel-cells = <1>;
> +            shunt-resistor-micro-ohms = <100000>;
> +        };
> +    };
> -- 
> 2.53.0
> 

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