Re: [PATCH net-next v2 0/5] net: phy: Disable MDIO broadcast address on YT8821

[Russell King (Oracle)]

On Sun, Mar 01, 2026 at 05:06:58PM +0100, Andrew Lunn wrote:
> I can understand a PHY might support this, optionally, with a
> pull-up/down strapping, saying "Break the standard, also respond to
> address 0". But this clearly should be an opt in, and an extra
> component is required.
> 
> I'm still not convinced Linux should be handling either of these
> conditions.

+1.

> And even if it did, it should not be in the core, but
> hidden away in a driver.

It's not something a driver can handle, because by the time a driver
gets to see anything about the devices, we could've already scanned
the addresses and read bad IDs.

I believe we've said before that the board firmware should be fixing
this, not the kernel - I know I have said that on more than one
occasion about this broken hardware.

-- 
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