Hi Biju,
On Fri, Oct 16, 2020 at 8:13 AM Biju Das <biju.das.jz@xxxxxxxxxxxxxx> wrote:
> > Subject: Re: [PATCH 2/2] arm64: dts: renesas: cat875: Remove rxc-skew-ps
> > from ethernet-phy node
> > On Thu, Oct 15, 2020 at 3:24 PM Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > wrote:
> > > The CAT875 sub board from Silicon Linux uses Realtek phy and the
> > > driver does not support rxc-skew-ps property.
> > >
> > > Fixes: 6b170cd3ed02949f ("arm64: dts: renesas: cat875: Add ethernet
> > > support")
> > > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-
> > lad.rj@xxxxxxxxxxxxxx>
> >
> > Thanks for your patch!
> >
> > > --- a/arch/arm64/boot/dts/renesas/cat875.dtsi
> > > +++ b/arch/arm64/boot/dts/renesas/cat875.dtsi
> > > @@ -21,7 +21,6 @@
> > > status = "okay";
> > >
> > > phy0: ethernet-phy@0 {
> > > - rxc-skew-ps = <1500>;
> > > reg = <0>;
> > > interrupt-parent = <&gpio2>;
> > > interrupts = <21 IRQ_TYPE_LEVEL_LOW>;
> >
> > Should "rx-internal-delay-ps = <1800>" be added to the avb node instead
> > (after [1] has entered v5.10-rc1, and the DTS part of [2] has been applied to
> > renesas-devel)?
>
> Looking at the schematic, it is not needed, since it has "2ns" internal delay (4.7K Ohm latched to 2.5 V) on the Rx side.
Thanks for the pointer, I can confirm LED2_RXDLY is strapped high
(to 3.3V, not 2.5V though).
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
i.e. will queue in renesas-devel for v5.11.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
