SpacemiT K1 and K3 RISC-V SoC reset controllers
The on-chip reset controllers found inside SpacemiT's K1 and K3 RISC-V system-on-chips, used to bring individual hardware blocks (peripherals, cores, AI accelerators) in and out of reset. The K1 powers single-board computers and compute modules sold from 2024 onward, while the K3 is a newer AI-focused CPU that began shipping in 2026 and is targeted at edge-AI and developer platforms.
recommendation
It should stay in the kernel because this supports brand-new RISC-V silicon from SpacemiT that is actively shipping: the K1 appeared in commercial products like the Banana Pi BPI-CM6 module in late 2025, and the K3 AI CPU launched in January 2026 with Canonical announcing Ubuntu availability for both. The driver itself is young and under active development, with patches in early 2026 refactoring shared code and adding K3 support, so upstream is expanding it rather than winding it down.
repository signals
sources
- spinics.net
January 20, 2026 patch series adds the SpacemiT K3 reset driver, showing active upstream enablement rather than removal.
- spinics.net
January 20, 2026 patch extracts common SpacemiT reset code for K1/K3, indicating ongoing maintenance and architecture expansion.
- cateee.net
LKDDb lists CONFIG_RESET_SPACEMIT in Linux 6.17-6.19, confirming this is a newly introduced upstream driver family.
- canonical.com
Canonical states Ubuntu is available on SpacemiT's new K3 SoC and existing K1 series platforms for developer and edge-AI use cases.
- cnx-software.com
A SpacemiT K1 compute module was commercially announced in November 2025, supporting evidence that K1 hardware was sold new in 2025.
- globenewswire.com
SpacemiT announced K3 in January 2026 with initial deliveries planned from the end of April 2026, showing current-generation hardware rollout.
codex reasoning notes (technical)
Local file inspection via `rg` showed reset controller drivers for SpacemiT K1 and K3, and local `git -c safe.directory=... log` showed four substantive 2026 commits including a March 20 follow-up fix. `lei` was unavailable, so lore evidence was obtained via web search hits to spinics.net lore mirrors; those show recent addition/refactoring patches and no removal discussion. Deployment evidence came from web search results on Canonical, CNX Software, and GlobeNewswire showing K1 products sold in late 2025 and K3 launch/deliveries in 2026. This is a young upstream driver for actively launched SoCs, with niche but real current deployments, so keep rather than deprecate.