drivers/clk/ralink · keep-annotate

Ralink and MediaTek MIPS router SoC clock controllers

Provides the on-chip clock generators for Ralink and early MediaTek MIPS system-on-chips that powered a generation of inexpensive consumer Wi-Fi routers and travel routers from roughly the late 2000s through the late 2010s, including the RT288x, RT305x, RT3883, MT7620, MT7621, and MT76x8 families. Without it, the CPU and peripherals on those router boards cannot be clocked correctly at boot.

keep-annotate conf=0.85 last_sold=2023 deploy=low replacement=none subsystem=clk category=platform-vendor

85%

recommendation

Worth keeping but flagging as legacy silicon. The clock controllers are still receiving upstream bug-fix attention (a stable backport landed in February 2025), and at least one supported chip, the MT7628NN, was still being sold new in inexpensive travel routers like the GL.iNet GL-MT300N-V2 in 2025. Volumes are low and the SoC family is well past its prime, but there is no replacement driver because the hardware support is inherently SoC-specific.

repository signals

4 files

1,715 source lines

14 commits, 5y

+1,282 / −54 lines added / removed, 5y

4 authors, 5y

monthly commits · 2021-04-21 → 2026-04-21 · 14 total · active in 8/61 months

sources

git.kernel.org
Kernel Kconfig for this directory covers MediaTek MT7621 and older Ralink/MediaTek MIPS SoCs including RT305X/RT288X/RT3883/MT7620 families.
lore.kernel.org
A 2025 stable backport for clk-mtmips ('remove duplicated xtal clock for Ralink SoC RT3883') shows the driver still receives upstream bug-fix attention rather than removal.
store-us.gl-inet.com
GL.iNet was still selling the GL-MT300N-V2 with MT7628NN, showing at least part of the supported SoC family remained available new in 2025-era retail channels.

codex reasoning notes (technical)

Real clock driver, not a helper library. Local tree inspection (`rg`) showed `drivers/clk/ralink/Kconfig` and the two C files target MT7621 plus older RT/MTMIPS SoCs. Lore evidence came from `lore_activity(file=drivers/clk/ralink/clk-mtmips.c, since=5y/2y)`, which surfaced a 2025 stable fix and no removal thread; `clk-mt7621.c` showed no recent lore hits, but the directory-level static metadata still shows substantive 2025 activity. Deployment looks legacy-heavy but not extinct: the kernel.org Kconfig URL is a canonical-recall source for supported chip families, and the GL.iNet store URL was obtained by web search and shows an MT7628NN product still on sale. Conclusion: keep the driver, but annotate it as legacy/low-volume consumer-router silicon with no natural replacement beyond SoC-specific support.