Re: [net-next,PATCH 4/4] dt-bindings: mdio-ipq4019: add clock support

[Florian Fainelli]

On 7/2/2020 12:18 PM, Robert Marko wrote:
> On Thu, Jul 2, 2020 at 3:38 PM Andrew Lunn <and...@lunn.ch> wrote:
>>
>>> +  clock-frequency:
>>> +    default: 100000000
>>
>> IEEE 802.3 says the default should be 2.5MHz. Some PHYs will go
>> faster, but 100MHz seems unlikely!
> This MDIO controller has an internal divider, by default its set for
> 100MHz clock.
> In IPQ4019 MDIO clock is not controllable but in IPQ6018 etc it's 
> controllable.
> That is the only combination I have currently seen used by Qualcomm.

Not sure I understand here, the 'clock-frequency' is supposed to denote
the MDIO bus output clock frequency, that is the frequency at which all
MDIO devices are going to operate at. Is this 100MHz a clock that feeds
into the MDIO block and get internally divided by a programmable
register to obtain an output MDIO clock?
-- 
Florian