Re: [PATCH net-next v3 3/5] net: phy: mxl-gpy: release MxL86211C Super Isolate

[Robert Marko]

On Tue, Oct 20, 2026 at 2:48 PM Andrew Lunn <andrew@xxxxxxx> wrote:
>
> On Tue, Oct 20, 2026 at 11:35:36AM +0200, Robert Marko wrote:
> > The MxL86211C can be strapped into Super Isolate mode, leaving the PHY
> > halted after reset until software releases it.
> >
> > Release Super Isolate before gpy_probe() reads the firmware version. Do it
> > again in config_init, where optional VDDP setup is reapplied after each
> > hardware reset.
>
> This needs expanding a bit. All reset actions by the core should
> happen before probe. So why is releasing isolate in probe not
> sufficient?
>
> If the MDIO bus voltages are lost, what else is lost? Should
> phy_init_hw() be called again?

I think that Sashiko confused me, it claimed that PHY HW reset could
happen during interface up/down, etc, so these would be lost.

Is that correct?

Cause if PHY HW reset only happens before probe, then doing the
voltage and SI in .probe is fine.

Regards,
Robert

>
>         Andrew



-- 
Robert Marko
Staff Embedded Linux Engineer
Sartura d.d.
Lendavska ulica 16a
10000 Zagreb, Croatia
Email: robert.marko@xxxxxxxxxx
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