[PATCH] mx6cuboxi: fix ethernet after synchronise device-tree

[Tom Rini]

On Thu, Jul 28, 2022 at 07:08:35AM +0000, Josua Mayer wrote:
> Please hold off merging this patch until someone tested it, I can not do so
> this week.
> @Tom Can you confirm if this fixes the networking on your Cubox?
> Also note that the phy-handle property may or may not be required, I am not
> sure.

Ah, the patch email itself seems to have gotten lost, can you resend and
I'll test?  Thanks.

> 
> sincerely
> Josua Mayer
> 
> On Thu, Jul 28, 2022 at 7:05 AM Josua Mayer <josua at solid-run.com> wrote:
> 
> > The i.MX6 Cubox-i and HummingBoards can have different PHYs at varying
> > addresses. U-Boot needs to auto-detect which phy is actually present,
> > and at which address it is responding.
> >
> > Auto-detection from multiple phy nodes specified in device-tree does not
> > currently work correct. As a work-around merge all three possible phys
> > into one node with the special address 0xffffffff which indicates to the
> > generic phy driver to probe all addresses.
> > Also fixup this fake address before booting Linux, *if* booting with
> > U-Boot's internal dtb.
> >
> > Signed-off-by: Josua Mayer <josua at solid-run.com>
> > Fixes: d0399a46e7cd
> > ---
> >  arch/arm/dts/imx6qdl-sr-som.dtsi     | 30 +++++++++-------------------
> >  board/solidrun/mx6cuboxi/mx6cuboxi.c |  6 +++++-
> >  2 files changed, 14 insertions(+), 22 deletions(-)
> >
> > diff --git a/arch/arm/dts/imx6qdl-sr-som.dtsi
> > b/arch/arm/dts/imx6qdl-sr-som.dtsi
> > index ce543e325c..2d7cbc26b3 100644
> > --- a/arch/arm/dts/imx6qdl-sr-som.dtsi
> > +++ b/arch/arm/dts/imx6qdl-sr-som.dtsi
> > @@ -53,6 +53,7 @@
> >  &fec {
> >         pinctrl-names = "default";
> >         pinctrl-0 = <&pinctrl_microsom_enet_ar8035>;
> > +       phy-handle = <&phy>;
> >         phy-mode = "rgmii-id";
> >
> >         /*
> > @@ -68,30 +69,17 @@
> >                 #address-cells = <1>;
> >                 #size-cells = <0>;
> >
> > -               /*
> > -                * The PHY can appear at either address 0 or 4 due to the
> > -                * configuration (LED) pin not being pulled sufficiently.
> > -                */
> > -               ethernet-phy at 0 {
> > -                       reg = <0>;
> > +               phy: ethernet-phy at 0 {
> > +                       /*
> > +                        * The PHY can appear either:
> > +                        * - AR8035: at address 0 or 4
> > +                        * - ADIN1300: at address 1
> > +                        * Actual address being detected at runtime.
> > +                        */
> > +                       reg = <0xffffffff>;
> >                         qca,clk-out-frequency = <125000000>;
> >                         qca,smarteee-tw-us-1g = <24>;
> > -               };
> > -
> > -               ethernet-phy at 4 {
> > -                       reg = <4>;
> > -                       qca,clk-out-frequency = <125000000>;
> > -                       qca,smarteee-tw-us-1g = <24>;
> > -               };
> > -
> > -               /*
> > -                * ADIN1300 (som rev 1.9 or later) is always at address 1.
> > It
> > -                * will be enabled automatically by U-Boot if detected.
> > -                */
> > -               ethernet-phy at 1 {
> > -                       reg = <1>;
> >                         adi,phy-output-clock = "125mhz-free-running";
> > -                       status = "disabled";
> >                 };
> >         };
> >  };
> > diff --git a/board/solidrun/mx6cuboxi/mx6cuboxi.c
> > b/board/solidrun/mx6cuboxi/mx6cuboxi.c
> > index debf4f6a3b..52172a03b1 100644
> > --- a/board/solidrun/mx6cuboxi/mx6cuboxi.c
> > +++ b/board/solidrun/mx6cuboxi/mx6cuboxi.c
> > @@ -446,7 +446,7 @@ static int find_ethernet_phy(void)
> >   */
> >  int ft_board_setup(void *fdt, struct bd_info *bd)
> >  {
> > -       int node_phy0, node_phy1, node_phy4;
> > +       int node_phy, node_phy0, node_phy1, node_phy4;
> >         int ret, phy;
> >         bool enable_phy0 = false, enable_phy1 = false, enable_phy4 = false;
> >         enum board_type board;
> > @@ -478,6 +478,10 @@ int ft_board_setup(void *fdt, struct bd_info *bd)
> >                 return 0;
> >         }
> >
> > +       // update U-Boot's own unified phy node phy address, if present
> > +       node_phy = fdt_path_offset(fdt, "/soc/bus at 2100000/ethernet at 2188000
> > /mdio/phy");
> > +       ret = fdt_setprop_u32(fdt, node_phy, "reg", phy);
> > +
> >         // update all phy nodes status
> >         node_phy0 = fdt_path_offset(fdt, "/soc/bus at 2100000
> > /ethernet at 2188000/mdio/ethernet-phy at 0");
> >         ret = fdt_setprop_string(fdt, node_phy0, "status", enable_phy0 ?
> > "okay" : "disabled");
> > --
> > 2.37.1
> >
> >

-- 
Tom
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