U-Boot atheros PHY support and cubox ethernet

[Fabio Estevam]

Hi Tom,

On Wed, Jun 17, 2020 at 6:28 PM Fabio Estevam <festevam at gmail.com> wrote:
>
> Hi Tom,
>
> On Wed, Jun 17, 2020 at 4:00 PM Tom Rini <trini at konsulko.com> wrote:
>
> > Based on your follow-up patches, I think you'll be unsurprised it
> > doesn't work.  I get:
> > Net:   Could not get PHY for FEC0: addr 0
>
> Now I understand why the PHY could not be found with the patches I sent.
>
> On mx6cubox the AR8035 is clocked from a 25MHz clock coming from the
> i.MX6 GPIO16 pin.
>
> My patch incorrectly removed this setting.
>
> > +       int ret = enable_fec_anatop_clock(0, ENET_25MHZ);
> > +       if (ret)
> > +               return ret;
> > +
> > +       /* set gpr1[ENET_CLK_SEL] */
> > +       setbits_le32(&iomuxc_regs->gpr[1], IOMUXC_GPR1_ENET_CLK_SEL_MASK);
>
> enable_fec_anatop_clock() and GPR1 settings above must remain.
>
> In order to get patch 1 to work (the one that adds the
> qca,clk-out-frequency property ) you also need this FEC change:
> https://pastebin.com/raw/mcKdwwTs
>
> I hope this helps.

Good news! I managed to get access to an imx6 humming board and
managed to fix the Eternet issue.

I will submit the AR8035 fix.