On 2019-09-16 22:43, Hauke Mehrtens wrote:
On 9/16/19 7:09 PM, Martin Blumenstingl wrote:
Hi Martin,
On Mon, Sep 16, 2019 at 12:54 PM Martin Schiller <[email protected]>
wrote:
Hi!
I am searching for a possibility to disable Auto Negotiation of an
PEF7072 which is attached to MAC1 of the Lantiq xrx200 switch.
The xrx200-net driver does not seem to have support for that.
I don't know about xrx200-net, but ...
Accessing the STD_CRTL register on the mdio bus from uboot with the
mdio
command works like expected.
Any suggestions how to do that from linux userspace?
... my (limited) understanding is that this is one of the benefits of
DSA:
you get one interface per port - with that you can use for example
ethtool to disable auto negotiation for one port
kernel source reference: [0]
I also do not know if xrx200-net supports that or if it is possible
with
swconfig at all. There is also a DSA driver for this switch in the
mainline kernel:
https://elixir.bootlin.com/linux/latest/source/drivers/net/dsa/lantiq_gswip.c
This driver should support everything the xrx200-net driver supports
plus some extras.
I would prefer to use the DSA driver also in OpenWrt, but we need a way
to migrate the existing configurations which are based on swconfig to
DSA.
You could try the fixed-link attribute in device tree to model this
with
DSA.
Thanks for your answers.
Switching to DSA would be nice, but it's too much work I can't afford
right now.
Disabling ANEG in the DTS is not enough, because I also need a way to
turn
ANEG on and off at runtime.
Meanwhile I found out that there is a mechanism with swconfig to
configure
the link attributes:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=6219b3deae1c8dfbf405f5a701d3f3b00ebacce1
I will try to integrate this into the "old" xrx200-net driver.
Martin
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