Re: [PATCH] net: mdio: force deassert MDIO reset signal

[Russell King (Oracle)]

On Mon, Jan 16, 2023 at 09:44:01AM +0000, Pierluigi Passaro wrote:
> I can't really understand why the MDIO bus must check the PHY presence.
> Other busses try the communication only while probing the slaves,
> never before.

That is not true.

Any bus that relies on hardware identification to bind drivers reads
the identifying information prior to probing. For example, PCI, USB,
AMBA to name a few. AMBA didn't used to have this problem, but does
now - but at least under AMBA there's a bit more standardisation to
what needs to be done. With ethernet PHYs, what's needed is highly
platform specific.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!