[PATCH v3 1/2] dt-bindings: iio: adc: Add Nuvoton MA35D1 EADC

[Krzysztof Kozlowski]

On Fri, Oct 30, 2026 at 11:15:00AM +0800, Chi-Wen Weng wrote:
> From: Chi-Wen Weng <cwweng at nuvoton.com>
> 
> Add a devicetree binding for the Enhanced Analog-to-Digital Converter
> (EADC) found on Nuvoton MA35D1 SoCs.
> 
> The controller provides eight external analog inputs which can be used
> as single-ended channels or as four fixed differential pairs: 0-4,
> 1-5, 2-6 and 3-7.
> 
> Describe the four hardware interrupt outputs, ADINT0 through ADINT3.
> ADINT0 through ADINT2 are associated with the corresponding conversion
> interrupt flags, while ADINT3 is shared by the ADIF3 conversion
> interrupt and the ADCMPF0 through ADCMPF3 result-compare interrupt
> sources.
> 
> Also describe the functional clock, optional reset, optional external
> reference supply and optional DMA request.

Don't repeat the patch contents.

> 
> Expose the controller as an IIO channel provider through the
> DT #io-channel-cells property. The cell identifies the logical EADC
> channel selected by the reg value of the corresponding channel child
> node.
> 
> Restrict the channel binding to features supported by the MA35D1 EADC
> hardware and use the common single-channel representation for
> single-ended inputs.

And here even more.

> 
> Signed-off-by: Chi-Wen Weng <cwweng at nuvoton.com>
> ---
>  .../bindings/iio/adc/nuvoton,ma35d1-eadc.yaml | 175 ++++++++++++++++++
>  1 file changed, 175 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/nuvoton,ma35d1-eadc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/nuvoton,ma35d1-eadc.yaml b/Documentation/devicetree/bindings/iio/adc/nuvoton,ma35d1-eadc.yaml
> new file mode 100644
> index 000000000000..97144a8eeb5c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/nuvoton,ma35d1-eadc.yaml
> @@ -0,0 +1,175 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/nuvoton,ma35d1-eadc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Nuvoton MA35D1 Enhanced Analog-to-Digital Converter
> +
> +maintainers:
> +  - Chi-Wen Weng <cwweng at nuvoton.com>
> +
> +description: |
> +  The Nuvoton MA35D1 Enhanced Analog-to-Digital Converter (EADC) is a
> +  12-bit successive approximation converter with eight external analog
> +  inputs and one internally connected VBAT input.
> +
> +  The external inputs can be used as eight single-ended channels or as
> +  four fixed differential pairs: 0-4, 1-5, 2-6 and 3-7. The internally
> +  connected VBAT input is not described by a channel child node.
> +
> +  The controller provides four interrupt outputs, ADINT0 through ADINT3.
> +  ADINT0, ADINT1 and ADINT2 are generated by the corresponding ADIF0,
> +  ADIF1 and ADIF2 conversion interrupt flags. ADINT3 is shared by the
> +  ADIF3 conversion interrupt flag and the ADCMPF0 through ADCMPF3 result
> +  compare flags.
> +
> +properties:
> +  compatible:
> +    const: nuvoton,ma35d1-eadc
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    items:
> +      - description: ADINT0 conversion interrupt output generated by ADIF0
> +      - description: ADINT1 conversion interrupt output generated by ADIF1
> +      - description: ADINT2 conversion interrupt output generated by ADIF2
> +      - description: >

Drop >

> +          ADINT3 shared interrupt output generated by ADIF3 or by the
> +          ADCMPF0 through ADCMPF3 result compare flags
> +
> +  interrupt-names:
> +    items:
> +      - const: adint0
> +      - const: adint1
> +      - const: adint2
> +      - const: adint3

"int" is redundant, so honestly names should rather go away completely.

> +
> +  clocks:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1

Best regards,
Krzysztof