Re: [PATCH net-next 1/2] dt-bindings: net: document Microchip PIC64-HPSC/HX MDIO controller

[Conor Dooley]

On Mon, Mar 23, 2026 at 06:38:06AM -0700, Charles Perry wrote:
> On Thu, Mar 19, 2026 at 01:35:52AM +0000, Conor Dooley wrote:
> > On Wed, Mar 18, 2026 at 02:23:23PM -0700, Charles Perry wrote:
> > > > > +
> > > > > +  clock-frequency: true
> > > > 
> > > > Does this genuinely have no constraints?
> > > 
> > > It's going to divide the input frequency by 2 to 512 (the prescaler is 8
> > > bit long), so assuming an input clock of 156.25 MHz, the bounds are 305KHz
> > > to 78MHz. The standard is 2.5MHz.
> > > 
> > > I can add a maximum and minimum here since I do have some validation on
> > > this in the driver which will bail out if this is out of bound.
> 
> Hello Conor,
> 
> I have second doubt about this. The minimum and maximum depend on the input
> clock frequency which might change if someone uses a different crystal or
> clock config. So for that reason, I thinks it's better to not specify the
> bounds, because there's no way to know for sure what they when building the
> device tree.

Okay, sure.

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