Hi!

On Thu, Aug 20, 2020 at 7:55 AM René van Dorst [off-list ref] wrote:

With the current mainline code [1], the dsa code tries to detect how the MAC5
is used. All the three modes are supported. MAC5 -> PHY0, MAC5 ->
PHY4, MAC5 ->
EXTERNAL PHY and MAC5 to external MAC.

When MAC5 is a DSA port it skips settings the delay settings. See [2].

Maybe you can use a similar concept.

Current detection relies on an incorrect assumption that mt753x switch
is always used with mtk_eth_soc. It's a really hacky solution to use
dt properties that don't belong to this switch at all and I think this
approach should not be followed further by future code.
The usage of mac5 should be explicitly defined as a dt property
under mt753x node.
-- 
Regards,
Chuanhong Guo