Re: [PATCH net-next v3 2/3] dt-bindings: net: wiznet,w5100: add link-gpios

[Krzysztof Kozlowski]

On 10/08/2026 10:12, Arthur Crépin Leblond wrote:
> On Mon, Aug 10, 2026 at 09:59:18AM +0200, Krzysztof Kozlowski wrote:
>> On 10/08/2026 09:53, Arnd Bergmann wrote:
>>> On Mon, Aug 10, 2026, at 09:43, Krzysztof Kozlowski wrote:
>>>> On Thu, Aug 06, 2026 at 05:00:01PM +0200, Arthur Crépin Leblond wrote:
>>>>>
>>>>> +  link-gpios:
>>>>> +    description:
>>>>> +      An optional GPIO line that can be wired to the LINKLED pin of the w5500
>>>>> +      as an interrupt to detect link status changes.
>>>>
>>>> The message is confusing. If you describe it from the host (system point
>>>> of view), then interrupts are not GPIOs but "interrupts".
>>>>
>>>> But maybe this is OUT GPIO from the system to the device?
>>>
>>> From the device point of view, it's an LED output, but from the
>>> system side we should describe it as an IRQ_TYPE_EDGE_BOTH
>>> "interrupts" property rather than a gpio line.
>>
>> Then probably we should list all four other pins as well (speed, duplex
>> and active).
>>
>> Best regards,
>> Krzysztof
> 
> We use this line to detect a link change but don't read its value in
> the interrupt handler, we read the i2c PHYCFGR register to get the
> link status.

I know, but won't you have soon the same problem with active? Otherwise
are you going to keep polling for the active link, since it is not
reported through the main interrupt?

Best regards,
Krzysztof