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Message-ID: <Y+D/lYul5X0JuHOR@lunn.ch>
Date: Mon, 6 Feb 2023 14:24:37 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Angelo Dureghello <angelo@...nel-space.org>
Cc: Vladimir Oltean <olteanv@...il.com>, netdev@...r.kernel.org
Subject: Re: mv88e6321, dual cpu port
> This is what i am testing now, a bit different,
> swapped ports 5 and 6.
>
> #
> # Configuration:
> # cpu +---- port0
> # br0 eth0 <-> rgmii port 6 -+---- port1
> # |
> # +---- port2
> #
> # user +---- port3
> # br1 eth1 <-> rmii port 5 -+-----port4
> #
> #
>
> mdio {
> #address-cells = <1>;
> #size-cells = <0>;
>
> switch1: switch1@1d {
> compatible = "marvell,mv88e6085";
> reg = <0x1d>;
> interrupt-parent = <&lsio_gpio3>;
> interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
> interrupt-controller;
> #interrupt-cells = <2>;
>
> ports {
> #address-cells = <1>;
> #size-cells = <0>;
>
> port@0 {
> reg = <0>;
> label = "port0";
> phy-mode = "1000base-x";
> managed = "in-band-status";
> sfp = <&sfp_0>;
> };
> port@1 {
> reg = <1>;
> label = "port1";
> phy-mode = "1000base-x";
> managed = "in-band-status";
> sfp = <&sfp_1>;
> };
> /* This is phyenet0 now */
> port@2 {
> reg = <2>;
> label = "port2";
> phy-handle = <&switchphy2>;
> };
> port@6 {
> /* wired to cpu fec1 */
> reg = <6>;
> label = "cpu";
> ethernet = <&fec1>;
> fixed-link = <0 1 1000 0 0>;
This is the deprecated way to do fixed link. Use
fixed-link {
speed = <1000>;
full-duplex;
};
> };
> port@3 {
> /* phy is internal to the switch */
> reg = <3>;
> label = "port3";
> phy-handle = <&switchphy3>;
> };
> port@4 {
> /* phy is internal to the switch */
> reg = <4>;
> label = "port4";
> phy-handle = <&switchphy4>;
> };
> port@5 {
> /* wired to cpu fec2 */
> reg = <5>;
> label = "port5";
> ethernet = <&fec2>;
This is wrong. As far as the switch is concerned, this port is nothing
special. It is just a regular user port. So it should not have an
ethernet property.
> fixed-link = <1 1 100 0 0>;
> };
> };
>
> All seems to work properly, but on ports 0, 1, 2 i cannot go
> over 100Mbit even if master port (6) is rgmii
> (testing by iperf3).
What SoC is this? Some FECs are only Fast ethernet.
What does ethtool show for eth0?
Do you also have a fixed link in the fec node?
Andrew
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