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    Subject[PATCH AUTOSEL for 4.15 089/102] arm64: dts: renesas: salvator-common: Add EthernetAVB PHY reset
    Date
    From: Geert Uytterhoeven <geert+renesas@glider.be>

    [ Upstream commit f5bbcd533a9d1af97b8a0862a421bb8455f1bf6d ]

    Describe the GPIO used to reset the Ethernet PHY for EthernetAVB.
    This allows the driver to reset the PHY during probe and after system
    resume.

    This fixes Ethernet operation after resume from s2ram on Salvator-XS,
    where the enable pin of the regulator providing PHY power is connected
    to PRESETn, and PSCI powers down the SoC during system suspend.

    On Salvator-X, the enable pin is always pulled high, but the driver may
    still need to reset the PHY if this wasn't done by the bootloader
    before.

    Inspired by patches in the BSP for the individual Salvator-X/XS boards
    by Kazuya Mizuguchi.

    Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
    Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    ---
    arch/arm64/boot/dts/renesas/salvator-common.dtsi | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
    index dbe2648649db..7c49b3e8c8fb 100644
    --- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
    +++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
    @@ -263,6 +263,7 @@
    reg = <0>;
    interrupt-parent = <&gpio2>;
    interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
    + reset-gpios = <&gpio2 10 GPIO_ACTIVE_LOW>;
    };
    };

    --
    2.14.1
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