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    Subject[PATCH 4.5 155/238] ARC: [plat-axs10x] add Ethernet PHY description in .dts
    Date
    4.5-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>

    commit 667a490bdb6e27db0887d2ca515b907d6aa87118 upstream.

    Commit e34d65696d2e ("stmmac: create of compatible mdio bus for stmmac
    driver") broke DW GMAC functionality on ARC AXS10x boards:

    That's what happens on eth0 up:
    --------------------------->8------------------------
    | libphy: PHY stmmac-0:ffffffff not found
    | eth0: Could not attach to PHY
    | stmmac_open: Cannot attach to PHY (error: -19)
    --------------------------->8------------------------

    Simplest solution is to add PHY description in board's .dts.
    And so we do here.

    Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
    Cc: Rob Herring <robh@kernel.org>
    Cc: Phil Reid <preid@electromag.com.au>
    Cc: David S. Miller <davem@davemloft.net>
    Cc: linux-kernel@vger.kernel.org
    Cc: netdev@vger.kernel.org
    Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
    Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/arc/boot/dts/axs10x_mb.dtsi | 8 ++++++++
    1 file changed, 8 insertions(+)

    --- a/arch/arc/boot/dts/axs10x_mb.dtsi
    +++ b/arch/arc/boot/dts/axs10x_mb.dtsi
    @@ -47,6 +47,14 @@
    clocks = <&apbclk>;
    clock-names = "stmmaceth";
    max-speed = <100>;
    + mdio0 {
    + #address-cells = <1>;
    + #size-cells = <0>;
    + compatible = "snps,dwmac-mdio";
    + phy1: ethernet-phy@1 {
    + reg = <1>;
    + };
    + };
    };

    ehci@0x40000 {

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