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SubjectRe: [PATCH v2 2/2] ARM: dts: ls1021: Fix SGMII PCS link remaining down after PHY disconnect
On Fri, 12 Apr 2019 at 02:27, Vladimir Oltean <olteanv@gmail.com> wrote:
>
> Each eTSEC MAC has its own TBI (SGMII) PCS and private MDIO bus.
> But due to a DTS oversight, both SGMII-compatible MACs of the LS1021 SoC
> are pointing towards the same internal PCS. Therefore nobody is
> controlling the internal PCS of eTSEC0.
>
> Upon initial ndo_open, the SGMII link is ok by virtue of U-boot
> initialization. But upon an ifdown/ifup sequence, the code path from
> ndo_open -> init_phy -> gfar_configure_serdes does not get executed for
> the PCS of eTSEC0 (and is executed twice for MAC eTSEC1). So the SGMII
> link remains down for eTSEC0. On the LS1021A-TWR board, to signal this
> failure condition, the PHY driver keeps printing
> '803x_aneg_done: SGMII link is not ok'.
>
> Fixes: 055223d4d22d ("ARM: dts: ls1021a: Enable the eTSEC ports on QDS and TWR")
> Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
> Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
> ---
> arch/arm/boot/dts/ls1021a-twr.dts | 9 ++++++++-
> arch/arm/boot/dts/ls1021a.dtsi | 9 +++++++++
> 2 files changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/ls1021a-twr.dts b/arch/arm/boot/dts/ls1021a-twr.dts
> index 97e1fb7ea932..9b1fe99d55b1 100644
> --- a/arch/arm/boot/dts/ls1021a-twr.dts
> +++ b/arch/arm/boot/dts/ls1021a-twr.dts
> @@ -145,7 +145,7 @@
> };
>
> &enet0 {
> - tbi-handle = <&tbi1>;
> + tbi-handle = <&tbi0>;
> phy-handle = <&sgmii_phy2>;
> phy-connection-type = "sgmii";
> status = "okay";
> @@ -225,6 +225,13 @@
> sgmii_phy2: ethernet-phy@2 {
> reg = <0x2>;
> };
> + tbi0: tbi-phy@1f {
> + reg = <0x1f>;
> + device_type = "tbi-phy";
> + };
> +};
> +
> +&mdio1 {
> tbi1: tbi-phy@1f {
> reg = <0x1f>;
> device_type = "tbi-phy";
> diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi
> index 1a2a9509d9c2..89eab1fd1f7f 100644
> --- a/arch/arm/boot/dts/ls1021a.dtsi
> +++ b/arch/arm/boot/dts/ls1021a.dtsi
> @@ -709,6 +709,15 @@
> <0x0 0x2d10030 0x0 0x4>;
> };
>
> + mdio1: mdio@2d64000 {
> + compatible = "fsl,etsec2-mdio";
> + device_type = "mdio";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x0 0x2d64000 0x0 0x4000>,
> + <0x0 0x2d50030 0x0 0x4>;
> + };
> +
> ptp_clock@2d10e00 {
> compatible = "fsl,etsec-ptp";
> reg = <0x0 0x2d10e00 0x0 0xb0>;
> --
> 2.17.1
>

Hi Leo,

Just a reminder that I resent this patch rebased on top of the
compatible string change.

Thanks,
-Vladimir

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