Renesas SH, R-Car, and RZ Ethernet, AVB, and TSN controllers
Ethernet MAC, Audio Video Bridging (AVB), Time-Sensitive Networking (TSN), and on-chip Ethernet switch controllers built into Renesas system-on-chip parts, ranging from older SuperH microcontrollers to current RZ/G industrial SoCs and R-Car automotive processors used in cars, factory equipment, and embedded networking gear.
recommendation
It should stay because this directory holds several actively maintained drivers for Renesas Ethernet hardware that ships in current SoCs. The older SH Ethernet support sits alongside RAVB, R-Switch, and RTSN drivers that were still receiving feature work and stable fixes in 2026, and Renesas continues to sell RZ/G2L (with longevity guaranteed to 2037) and R-Car V4H automotive parts that rely on these drivers.
repository signals
sources
- lore.kernel.org
`ravb_main.c` was still receiving bug-fix and stable-track attention in April 2026 ('net: ethernet: ravb: Disable interrupts when closing device').
- lore.kernel.org
`rswitch_main.c` was under active net-next feature development in March 2026 as part of a v3 13-patch series.
- renesas.com
Renesas lists RZ/G2L as Active with product longevity to 2037 and integrated Gigabit Ethernet, indicating current sale of SoCs using this driver family.
- renesas.com
Renesas lists R-Car V4H as Active and advertises Ethernet AVB and TSN, matching the newer Renesas Ethernet drivers in this directory.
codex reasoning notes (technical)
Local tree inspection via `exec_command` showed this directory contains multiple real platform drivers (`sh_eth`, `ravb`, `rswitch`, `rtsn`) in Kconfig and module declarations, so it is an active multi-driver vendor subtree rather than a legacy singleton. Lore evidence was gathered with `lore_activity` on `ravb_main.c` and `rswitch_main.c`; both show 2026 activity, including stable fixes and net-next feature work, and no removal signal was found. Vendor deployment evidence was gathered with `web.search_query`, which returned current Renesas product pages for RZ/G2L and R-Car V4H marked Active; together they show this subtree still maps to shipping embedded/automotive silicon. Because the directory mixes old SH-era support with actively developed AVB/TSN/switch blocks and has no single successor driver, removal or deprecation is not justified.