Re: [PATCH v3 02/12] dt-bindings: net: add new property st,ext-phyclk in documentation for stm32

[Christophe ROULLIER <christophe.roullier@foss.st.com>]

On 9/28/23 19:17, Conor Dooley wrote:
> On Thu, Sep 28, 2023 at 05:15:02PM +0200, Christophe Roullier wrote:
>> Add property st,ext-phyclk to manage cases when PHY have no cristal/quartz
>> This property can be used with RMII phy without cristal 50Mhz and when we
>> want to select RCC clock instead of ETH_REF_CLK
>> Can be used also with RGMII phy with no cristal and we select RCC clock
>> instead of ETH_CLK125
>> This new property replace st,eth-clk-sel and st,eth-ref-clk-sel
> I don't really see a response to Rob's comment on v2, either here or in
> a reply to his email on v2:
> | Certainly 1 property is better than 2 for me, but carrying 3 is not
> | great. I don't understand why the we need a new property. What can't be
> | supported with the existing properties?
>
> A sentence saying explaining exactly what the old properties do not
> support that this one does, would be very helpful.
>
> Thanks,
> Conor.

I understand your remarks, the goal of the new property is to be more 
simple for customers/users

with old properties we have lots of support to explain which one to use 
in which cases, now only one property to use (regardless of mode)

Thanks,

Christophe.

>> Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
>> ---
>>   Documentation/devicetree/bindings/net/stm32-dwmac.yaml | 9 +++++++++
>>   1 file changed, 9 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
>> index ca976281bfc22..67840cab02d2d 100644
>> --- a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
>> +++ b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
>> @@ -78,12 +78,21 @@ properties:
>>         encompases the glue register, the offset of the control register and
>>         the mask to set bitfield in control register
>>   
>> +  st,ext-phyclk:
>> +    description:
>> +      set this property in RMII mode when you have PHY without crystal 50MHz and want to
>> +      select RCC clock instead of ETH_REF_CLK. or in RGMII mode when you want to select
>> +      RCC clock instead of ETH_CLK125.
>> +    type: boolean
>> +
>>     st,eth-clk-sel:
>> +    deprecated: true
>>       description:
>>         set this property in RGMII PHY when you want to select RCC clock instead of ETH_CLK125.
>>       type: boolean
>>   
>>     st,eth-ref-clk-sel:
>> +    deprecated: true
>>       description:
>>         set this property in RMII mode when you have PHY without crystal 50MHz and want to
>>         select RCC clock instead of ETH_REF_CLK.
>> -- 
>> 2.25.1
>>