Re: [PATCH 5/8] arm64: dts: meson: remove reset-gpios from ethernet node for VIM2 meson-gxm-khadas-vim2

[Martin Blumenstingl]

Hello Artem,

On Fri, Sep 25, 2020 at 5:31 AM Artem Lapkin <email2tema@xxxxxxxxx> wrote:
>
> 1) fix down/up ethernet interface - need remove reset-gpios for ethernet node
>
> `ifconfig eth0 down && ifconfig eth0 up` # didnt works with reset-gpios
what is the problem that you observe here?
did you investigate further why resetting the PHY changes this?

the problem I see with removing the reset-gpios is that we cannot
fully reset the PHY into a defined state
some of the registers are kept with a soft-reset

> 2) add max-speed 1Gbit
my understanding is that max-speed is needed when (in this case) the
PHY advertises a higher speed than the hardware is actually capable of
(for whatever reason)
what is the problem that you have seen when max-speed was not set?


Best regards,
Martin