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    Subject[PATCH 5.15 045/247] ARM: dts: aspeed: ast2600-evb: Enable RX delay for MAC0/MAC1
    Date
    From: Howard Chiu <howard_chiu@aspeedtech.com>

    [ Upstream commit 4d338ee40ba89e508c5d3e1b4af956af7cb5e12e ]

    Since mac0/1 and mac2/3 are physically located on different die,
    they have different properties by nature, which is mac0/1 has smaller delay step.

    The property 'phy-mode' on ast2600 mac0 and mac1 is recommended to set to 'rgmii-rxid'
    which enables the RX interface delay from the PHY chip.
    Refer page 45 of SDK User Guide v08.00
    https://github.com/AspeedTech-BMC/openbmc/releases/download/v08.00/SDK_User_Guide_v08.00.pdf

    Fixes: 2ca5646b5c2f ("ARM: dts: aspeed: Add AST2600 and EVB")
    Signed-off-by: Howard Chiu <howard_chiu@aspeedtech.com>
    Link: https://lore.kernel.org/r/SG2PR06MB23152A548AAE81140B57DD69E6E09@SG2PR06MB2315.apcprd06.prod.outlook.com
    Signed-off-by: Joel Stanley <joel@jms.id.au>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arm/boot/dts/aspeed-ast2600-evb.dts | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb.dts b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
    index b7eb552640cb..788448cdd6b3 100644
    --- a/arch/arm/boot/dts/aspeed-ast2600-evb.dts
    +++ b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
    @@ -103,7 +103,7 @@
    &mac0 {
    status = "okay";

    - phy-mode = "rgmii";
    + phy-mode = "rgmii-rxid";
    phy-handle = <&ethphy0>;

    pinctrl-names = "default";
    @@ -114,7 +114,7 @@
    &mac1 {
    status = "okay";

    - phy-mode = "rgmii";
    + phy-mode = "rgmii-rxid";
    phy-handle = <&ethphy1>;

    pinctrl-names = "default";
    --
    2.35.1


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