From: Jakub Kicinski Date: Sat, 6 Jun 2026 01:46:55 +0000 (-0700) Subject: Merge branch 'net-airoha-support-multiple-net_devices-connected-to-the-same-gdm-port' X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ecc4aa6f41c7f00498f1c4bb4c5ec46794ab0aa8;p=thirdparty%2Flinux.git Merge branch 'net-airoha-support-multiple-net_devices-connected-to-the-same-gdm-port' Lorenzo Bianconi says: ==================== net: airoha: Support multiple net_devices connected to the same GDM port EN7581 or AN7583 SoCs support connecting multiple external SerDes (e.g. Ethernet or USB SerDes) to GDM3 or GDM4 ports via a hw arbiter that manages the traffic in a TDM manner. As a result multiple net_devices can connect to the same GDM{3,4} port and there is a theoretical "1:n" relation between GDM ports and net_devices. ┌─────────────────────────────────┐ │ │ ┌──────┐ │ P1 GDM1 ├────►MT7530│ │ │ └──────┘ │ │ ETH0 (DSA conduit) │ │ │ PSE/FE │ │ │ │ │ │ │ ┌─────┐ │ P0 CDM1 ├────►QDMA0│ │ P4 P9 GDM4 │ └─────┘ └──┬─────────────────────────┬────┘ │ │ ┌──▼──┐ ┌────▼────┐ │ PPE │ │ ARB │ └─────┘ └─┬─────┬─┘ │ │ ┌──▼──┐┌─▼───┐ │ ETH ││ USB │ └─────┘└─────┘ ETH1 ETH2 This series introduces support for multiple net_devices connected to the same Frame Engine (FE) GDM port (GDM3 or GDM4) via an external hw arbiter. Please note GDM1 or GDM2 does not support the connection with the external arbiter. ==================== Link: https://patch.msgid.link/20260603-airoha-eth-multi-serdes-v9-0-5d476bc2f426@kernel.org Signed-off-by: Jakub Kicinski --- ecc4aa6f41c7f00498f1c4bb4c5ec46794ab0aa8