linux-kernel - Re: [PATCH v2] ARM: dts: zynq: Fix ethernet PHY for v5 schematics

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Date:   Fri, 1 May 2020 19:10:08 +0300
From:   "Matwey V. Kornilov" <matwey.kornilov@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/ZYNQ ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        Anton Gerasimov <tossel@...il.com>
Subject: Re: [PATCH v2] ARM: dts: zynq: Fix ethernet PHY for v5 schematics

Hi Anton,

I hope you are doing good. Could you please check this patch, since
you are initial author of zynq-zturn.dts and I suppose you do have the
"v4" board variant to test.

вт, 28 апр. 2020 г. в 13:04, Matwey V. Kornilov <matwey@....msu.ru>:
>
> There are at least two different versions existing for MYIR Zturn:
>
>  * v4 schematics has Atheros AR8035 PHY at 0b000
>      http://www.myirtech.com/download/Zynq7000/Z-TURNBOARD_schematic.pdf
>  * v5 schematics has Micrel KSZ9031 PHY at 0b011
>      v5 schematics available at DVD disk supplied with the board
>
> Specify both PHYs to make ethernet interface working for any board
> revision. This commit relies on of_mdiobus_register() behavior.
> When phy-handle is missed, every nested PHY node is considered,
> while ENODEVs are ignored.
>
> Before the patch:
>
> [   28.295002] macb e000b000.ethernet eth0: Could not attach PHY (-19)
>
> After the patch:
>
> [   28.257365] macb e000b000.ethernet eth0: PHY [e000b000.ethernet-ffffffff:00] driver [Micrel KSZ9031 Gigabit PHY] (irq=POLL)
> [   28.257384] macb e000b000.ethernet eth0: configuring for phy/rgmii-id link mode
>
> Signed-off-by: Matwey V. Kornilov <matwey@....msu.ru>

Cc: Anton Gerasimov <tossel@...il.com>

> ---
> Changes since v1:
>  - reworded commit message
>
>  arch/arm/boot/dts/zynq-zturn.dts | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/boot/dts/zynq-zturn.dts b/arch/arm/boot/dts/zynq-zturn.dts
> index 5ec616ebca08..07da9cf60d02 100644
> --- a/arch/arm/boot/dts/zynq-zturn.dts
> +++ b/arch/arm/boot/dts/zynq-zturn.dts
> @@ -67,10 +67,17 @@
>  &gem0 {
>         status = "okay";
>         phy-mode = "rgmii-id";
> -       phy-handle = <&ethernet_phy>;
>
> -       ethernet_phy: ethernet-phy@0 {
> -               reg = <0x0>;
> +       ethernet-phy@0 {
> +               compatible = "ethernet-phy-ieee802.3-c22";
> +               reg = <0>;
> +               max-speed = <1000>;
> +       };
> +
> +       ethernet-phy@3 {
> +               compatible = "ethernet-phy-ieee802.3-c22";
> +               reg = <3>;
> +               max-speed = <1000>;
>         };
>  };
>
> --
> 2.16.4
>


-- 
With best regards,
Matwey V. Kornilov