Re: [PATCH v3 5/8] dt-bindings: iio: adc: renesas,rzg2l-adc: Document RZ/G3L ADC for TSU

[Krzysztof Kozlowski <krzk@kernel.org>]

On Tue, Sep 22, 2026 at 05:26:57AM +0100, Biju Das wrote:
> Add the renesas,r9a08g046-adc1 compatible string for the ADC1
> instance on RZ/G3L, which is dedicated to the on-chip TSU (thermal

Is there ADC2 instance?

> sensor unit). Unlike the other ADC instances, this one only exposes
> a single channel (channel@8), so restrict the allowed channel nodes
> accordingly.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> ---
> v2->v3:
>  * Dropped required property '#io-channel-cells'.
> v1->v2:
>  * No Change.
> ---
>  .../bindings/iio/adc/renesas,rzg2l-adc.yaml     | 17 ++++++++++++++++-
>  1 file changed, 16 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/renesas,rzg2l-adc.yaml b/Documentation/devicetree/bindings/iio/adc/renesas,rzg2l-adc.yaml
> index 40341d541726..f08f5439d127 100644
> --- a/Documentation/devicetree/bindings/iio/adc/renesas,rzg2l-adc.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/renesas,rzg2l-adc.yaml
> @@ -25,7 +25,9 @@ properties:
>                - renesas,r9a07g054-adc   # RZ/V2L
>            - const: renesas,rzg2l-adc
>        - items:
> -          - const: renesas,r9a08g045-adc  # RZ/G3S
> +          - enum:
> +              - renesas,r9a08g045-adc   # RZ/G3S
> +              - renesas,r9a08g046-adc1  # RZ/G3L ADC for TSU
>  
>    reg:
>      maxItems: 1
> @@ -121,6 +123,19 @@ allOf:
>              reg:
>                maximum: 7
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: renesas,r9a08g046-adc1
> +    then:
> +      patternProperties:
> +        "^channel@[0-7]$": false
> +        "^channel@[8]$":

Why number 8? Does datasheet actually calls it that way?

> +          properties:
> +            reg:
> +              const: 8

Best regards,
Krzysztof