On Mon, Aug 23, 2021 at 7:08 AM Marek Szyprowski
[off-list ref] wrote:

Hi,

On 18.08.2021 04:17, Saravana Kannan wrote:

quoted

Allows tracking dependencies between Ethernet PHYs and their consumers.

Cc: Andrew Lunn <andrew@lunn.ch>
Cc: netdev@vger.kernel.org
Signed-off-by: Saravana Kannan <redacted>

This patch landed recently in linux-next as commit cf4b94c8530d ("of:
property: fw_devlink: Add support for "phy-handle" property"). It breaks
ethernet operation on my Amlogic-based ARM64 boards: Odroid C4
(arm64/boot/dts/amlogic/meson-sm1-odroid-c4.dts) and N2
(meson-g12b-odroid-n2.dts) as well as Khadas VIM3/VIM3l
(meson-g12b-a311d-khadas-vim3.dts and meson-sm1-khadas-vim3l.dts).

In case of OdroidC4 I see the following entries in the
/sys/kernel/debug/devices_deferred:

ff64c000.mdio-multiplexer
ff3f0000.ethernet

Let me know if there is anything I can check to help debugging this issue.

Looks to me like we need to handle 'mdio-parent-bus' dependency.

Rob