Re: [PATCH 1/5] dt-binding: trivial-devices: add arduino spi mcu interface

[Krzysztof Kozlowski <krzk@kernel.org>]

On 06/11/2025 16:31, Riccardo Mereu wrote:
> Add spidev item in order to describe in Arduino boards one of the
> interfaces between microprocessor and microcontroller.
> 
> Signed-off-by: Riccardo Mereu <r.mereu@arduino.cc>
> ---
>  Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
> index 2eff6f274302..c44fff4ce2e2 100644
> --- a/Documentation/devicetree/bindings/trivial-devices.yaml
> +++ b/Documentation/devicetree/bindings/trivial-devices.yaml
> @@ -59,6 +59,8 @@ properties:
>            - adi,lt7182s
>              # AMS iAQ-Core VOC Sensor
>            - ams,iaq-core
> +            # Arduino microcontroller interface over SPI, e.g. on UnoQ board
> +          - arduino,mcu

MCU is so broad it can cover everything, so for sure this is not a
trivial device. It also can be connected over serial, which would not be
covered here. Or can have additional GPIOs connected or supplies - also
not covered here.

Best regards,
Krzysztof