From: Ahmad Fatoum <[email protected]>
Date: Tue, 21 Aug 2018 17:35:48 +0200
> commit 739de9a1563a ("net: macb: Reorganize macb_mii bringup") broke
> initializing macb on the EVB-KSZ9477 eval board.
> There, of_mdiobus_register was called even for the fixed-link representing
> the RGMII-link to the switch with the result that the driver attempts to
> enumerate PHYs on a non-existent MDIO bus:
>
> libphy: MACB_mii_bus: probed
> mdio_bus f0028000.ethernet-ffffffff: fixed-link has invalid PHY address
> mdio_bus f0028000.ethernet-ffffffff: scan phy fixed-link at address 0
> [snip]
> mdio_bus f0028000.ethernet-ffffffff: scan phy fixed-link at address 31
>
> The "MDIO" bus registration succeeds regardless, having claimed the reset
> GPIO,
> and calling of_phy_register_fixed_link later on fails because it tries
> to claim the same GPIO:
>
> macb f0028000.ethernet: broken fixed-link specification
>
> Fix this by registering the fixed-link before calling mdiobus_register.
>
> Fixes: 739de9a1563a ("net: macb: Reorganize macb_mii bringup")
> Signed-off-by: Ahmad Fatoum <[email protected]>
Applied and queued up for -stable, thanks.
