On 2023-10-14 18:50, Andrew Lunn wrote:
On Fri, Oct 13, 2023 at 12:33:14PM +0200, Rafał Miłecki wrote:
From: Rafał Miłecki <rafal@xxxxxxxxxx>
While switch ports 5 and 7 are disabled (vendor designed port 8 to be
used for CPU traffic) they could be used strictly technically. For
some
reason however both those ports need forcing link to be usable.
This explanation is not making much sense to me.
I assume this board does not have an RJ45 for these two ports? But
does it have a header so you can access the MII interface?
This PATCH as it is requires a basic familiarity with Northstar platform
or checking bcm-ns.dtsi.
All Northstar (BCM5301X) devices have 3 Ethernet interfaces. 99% of them
have:
1. gmac0 connected to port 5
2. gmac1 connected to port 7
3. gmac2 connected to port 8
(it's described in bcm-ns.dtsi).
Some vendors decide to use gmac0 and switch port 5. They fill NVRAM with
MAC for gmac0.
Some vendors decide to use gmac2 & port 8. They set MAC for gmac2.
Netgear decided to use gmac2 & port 8 for R8000. They fill NVRAM with
MAC for gmac2.
If you however insist on using gmac0 you could do that. That just
requires setting up gmac0 with a custom/random MAC and forcing link for
switch ports as described in this PATCH.
Does it make sense now? Should I reword this commit somehow?
--
Rafał Miłecki
