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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jan 2026 05:44:39.5564 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 28720447-32ae-4ba6-0590-08de58b02b49 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.23.195];Helo=[lewvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF000001CD.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM3PPF5F5663669 Content-Type: text/plain; charset="utf-8" MAC Ports 1 and 2 of the CPSW3G Ethernet Switch in the AM62D2 SoC are both connected to different instances of the DP83867 Ethernet PHY on the AM62D2 EVM, with the 'phy-mode' set to 'rgmii-id'. The DP83867 Ethernet PHY has to add a 2 nanosecond delay on receive (from wire) based on the EVM design. Since the device driver for the DP83867 Ethernet PHY coincidentally assumes that a 2 nanosecond receive delay has to be added in the absence of the 'ti,rx-internal-delay' property, Ethernet is functional. However, since the device-tree is intended to describe the Hardware, and, the device driver for the DP83867 Ethernet PHY may change in the future, add the 'ti,rx-internal-delay' property and assign it the value 'DP83867_RGMIIDCTL_2_00_NS' which corresponds to a 2 nanosecond delay. Fixes: 1544bca2f188 ("arm64: dts: ti: Add support for AM62D2-EVM") Cc: Signed-off-by: Siddharth Vadapalli Reviewed-by: Hari Prasath Gujulan Elango --- Hello, v1 of this patch is at: https://lore.kernel.org/r/20260120061335.1497832-1-s-vadapalli@ti.com/ Changes since v1: - Fixed typo in the commit message based on the feedback at: https://lore.kernel.org/r/6650770b-2e9c-4f9a-8310-1f335ffa69f8@ti.com/ - Collected Reviewed-by tag from Hari Prasath Gujulan Elango https://lore.kernel.org/r/6650770b-2e9c-4f9a-8310-1f335ffa69f8@ti.com/ Patch is based on commit 6c790212c588 Merge tag 'devicetree-fixes-for-6.19-3' of git://git.kernel.or= g/pub/scm/linux/kernel/git/robh/linux of Mainline Linux. Regards, Siddharth. arch/arm64/boot/dts/ti/k3-am62d2-evm.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts b/arch/arm64/boot/dts= /ti/k3-am62d2-evm.dts index 2b233bc0323d..17c64af4f97b 100644 --- a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts +++ b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts @@ -649,12 +649,14 @@ &cpsw3g_mdio { =20 cpsw3g_phy0: ethernet-phy@0 { reg =3D <0>; + ti,rx-internal-delay =3D ; ti,fifo-depth =3D ; ti,min-output-impedance; }; =20 cpsw3g_phy1: ethernet-phy@3 { reg =3D <3>; + ti,rx-internal-delay =3D ; ti,fifo-depth =3D ; ti,min-output-impedance; }; --=20 2.51.1