Re: [PATCH 1/5] dt-bindings: net: qca,ar803x: Add IPQ5018 Internal GE PHY support

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 5/27/25 1:28 PM, George Moussalem wrote:
> Hi Konrad,
> 
> On 5/27/25 14:59, Konrad Dybcio wrote:
>> On 5/26/25 2:55 PM, Krzysztof Kozlowski wrote:
>>> On 26/05/2025 08:43, George Moussalem wrote:
>>>>>> +  qca,dac:
>>>>>> +    description:
>>>>>> +      Values for MDAC and EDAC to adjust amplitude, bias current settings,
>>>>>> +      and error detection and correction algorithm. Only set in a PHY to PHY
>>>>>> +      link architecture to accommodate for short cable length.
>>>>>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>>>>>> +    items:
>>>>>> +      - items:
>>>>>> +          - description: value for MDAC. Expected 0x10, if set
>>>>>> +          - description: value for EDAC. Expected 0x10, if set
>>>>>
>>>>> If this is fixed to 0x10, then this is fully deducible from compatible.
>>>>> Drop entire property.
>>>>
>>>> as mentioned to Andrew, I can move the required values to the driver
>>>> itself, but a property would still be required to indicate that this PHY
>>>> is connected to an external PHY (ex. qca8337 switch). In that case, the
>>>> values need to be set. Otherwise, not..
>>>>
>>>> Would qcom,phy-to-phy-dac (boolean) do?
>>>
>>> Seems fine to me.
>>
>> Can the driver instead check for a phy reference?
> 
> Do you mean using the existing phy-handle DT property or create a new DT property called 'qcom,phy-reference'? Either way, can add it for v2.

I'm not sure how this is all wired up. Do you have an example of a DT
with both configurations you described in your reply to Andrew?

Konrad