Flagship AX routers

Bjørn Mork bjorn at mork.no
Wed May 26 09:44:20 PDT 2021

Alberto Bursi <bobafetthotmail at gmail.com> writes:
> On 26/05/21 10:56, Bjørn Mork wrote:
>> Daniel Golle <daniel at makrotopia.org> writes:
>>> When using as dual-band AP, also the Gigabit Ethernet of the E8450 can
>>> become a bottle-kneck, UniFi 6 LR got that Aquantina 2.5GBase-T PHY
>> But there is no driver for that yet, right?  And for those of us who
>> aren't familiar with these magic phy things: Does this mean that it
>> currently works as a 1Gbit device only?  Or doesn't it work at all?
> If you are talking of Aquantia multigigabit ethernet chipsets they
> work fine in Linux, there is a upstream driver for x86 and ARM archs.

I'm talking about the phy which is described as this in the DTS:

        mdio: mdio-bus {
                #address-cells = <1>;
                #size-cells = <0>;

                ethernet-phy at 7 {
                        /* Marvell AQRate AQR112W - no driver */
                        compatible = "ethernet-phy-ieee802.3-c45";
                        reg = <0x7>;

There is a mainline driver in drivers/net/phy/aquantia_main.c, but it
doesn't support this chip (yet).  We have a patch in the layerscape
target, but I don't know if the "W" is significant enough that it
doesn't work:


And it needs to move to generic in any case.  

Therefore the question...

> I think someone even added the kmod for that (or the USB version of
> them) in OpenWrt somewhat recently.

I haven't followed this lately, but I seem to remember that the initial
USB version was a mess of phy driver mixed into the usb device driver.
Not sure that is true anymore.  But if it is, then it won't help much
for this device which IIUC is a MT7622 SoC connected to an AQR112W phy


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