Re: [PATCH net-next v2 0/5] net: phy: Disable MDIO broadcast address on YT8821
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
Date: 2026-03-01 17:07:50
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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. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!