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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jan 2026 06:12:24.3229 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2ced4f0b-b851-4d4b-201b-08de57eae11f X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.194];Helo=[flwvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000397AF.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM3PPFA35BF3976 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 the 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, This patch is based on commit 24d479d26b25 Linux 6.19-rc6 of Mainline Linux. Patch has been tested on the AM62D2 EVM verifying Ethernet functionality in the form of NFS (Network File System) mounted using the CPSW3G Ethernet interface 'eth0'. Test Logs: https://gist.github.com/Siddharth-Vadapalli-at-TI/04c51da22c0a05f7fc930afc9= 8997571 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