Re: [PATCH v1 1/2] dt-bindings: trivial-devices: add spi-miso-mosi-loopback

[Krzysztof Kozlowski]

On 16/03/2026 09:35, Krzysztof Kozlowski wrote:
> On 16/03/2026 08:35, Francesco Dolcini wrote:
>> From: Francesco Dolcini <francesco.dolcini@xxxxxxxxxxx>
>>
>> Add a compatible to describe a single wire loopback between SPI MISO and
>> MOSI signals.
>>
>> Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/
>> Signed-off-by: Francesco Dolcini <francesco.dolcini@xxxxxxxxxxx>
>> ---
>>  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 a482aeadcd44..2cb973c157f6 100644
>> --- a/Documentation/devicetree/bindings/trivial-devices.yaml
>> +++ b/Documentation/devicetree/bindings/trivial-devices.yaml
>> @@ -432,6 +432,8 @@ properties:
>>            - socionext,uniphier-smpctrl
>>              # SparkFun Qwiic Joystick (COM-15168) with i2c interface
>>            - sparkfun,qwiic-joystick
>> +            # Single wire loopback between SPI MISO and MOSI signals
>> +          - spi-miso-mosi-loopback
> 
> If you decided to go against my approach, then at least document it in
> proper place - incomplete-devices - so this won't be ever used in DTS.
>

... and then you will notice existing linux,spi-loopback-test, so
explain the differences and why spi-loopback-test cannot be used for
your loopback test.

Best regards,
Krzysztof