Re: [PATCH net-next v8 1/4] dt-bindings: net: pse-pd: add bindings for Realtek PSE MCU

[Oleksij Rempel <o.rempel@pengutronix.de>]

On Fri, Jul 24, 2026 at 09:18:45AM +0200, Jonas Jelonek wrote:
> Hi Oleksij,
> 
> On 23.07.26 12:20, Oleksij Rempel wrote:
> > On Thu, Jul 23, 2026 at 11:45:20AM +0200, Jonas Jelonek wrote:
> >>> Since we already talk about power budgeting - all of this make sense if
> >>> we have port priorities. For example PD692x0 firmware has default prios
> >>> bound to port numbers. Is it the same with this firmware?
> >> Looking at several switches, by default all ports have a priority of 0 assigned.
> >> Thus, no pre-defined prioritisation, it's up to the user to set this.
> > Do this switches have PSU covering all port at max load or it is over
> > provisioning by design. 
> 
> In most cases it's overprovisioned by design, the PSU budget is usually lower
> than what would be needed for all ports at max load. Even one of my switches,
> having a PoE budget of 400W, has 8 ports with 32W and 16 ports with 60 W,
> managed by 5 managers. Usually a manager is not overprovisioned but the
> system PSU is.
> 
> > Haw it behave in reality If we attach more
> > consumer then it is able to handle - all ports go off, or only some of
> > them?
> 
> That's a good question ^^. Unfortunately, I do not have enough PoE-powered
> devices here to test this scenario, or at least it takes a bit of time to get
> enough devices.
> 
> >
> > PD692x0 firmware has user configurable prios - but if many ports share
> > same prios it has internal prios based on port number.
> >
> 
> At least I'm not aware of that but since the firmware on the MCU is a
> blackbox, in the end this could be the case too. But it's not an obvious
> feature.

It would be nice to have both of this answers, but they are not blocker
for this patch set.

> I'd like to slightly adjust the bindings, given the confusion about the naming
> that came up with Sander.

Ack.

> Is there anything else that should be changed? Or is everything else in
> terms of supply, budgeting, etc. fine for follow-ups?

Ack, can be done in follow-ups.

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