Sophgo CV18xx and SG200x/SG204x SoC clock controllers
On-chip clock controllers for Sophgo's RISC-V system-on-chip family, including the CV1800, CV1810 and CV1812H camera/edge SoCs, the SG2000 used in Milk-V Duo boards, and the higher-end SG2042 and SG2044 server-class chips. These blocks gate and divide the clocks that feed every other peripheral on the SoC, so Linux cannot boot usefully on these chips without them.
recommendation
It should stay because this code supports current, actively sold RISC-V hardware: Milk-V is still shipping SG2000-based Duo modules, Sophgo promotes the CV1812H Huashan Pi board, and SG2044 support was added upstream as recently as April 2025 with further maintenance work continuing into 2026. There is no generic replacement for an SoC's own clock controller, and the upstream activity shows healthy ongoing development rather than any move toward removal.
repository signals
sources
- spinics.net
April 2025 patch series '[PATCH v5 0/5] clk: sophgo: add SG2044 clock controller support' shows new feature enablement, not removal.
- spinics.net
January 2026 patch '[PATCH 01/27] clk: sophgo: cv18xx-ip: convert from divider_round_rate() to divider_determine_rate()' shows ongoing API-maintenance work in this directory.
- spinics.net
April 2025 coccicheck-fix thread for clk: sophgo shows routine upkeep and review activity.
- milkv.io
Milk-V's SG2000 chip page presents the SG2000 as a current chip for edge/smart-home products and includes a 'Buy Now' path.
- milkv.io
Milk-V Duo Module 01 is a current product built around SG2000 and marketed for product development.
- en.sophgo.com
Sophgo's open-source hardware page lists the Huashan Pi evaluation board for the CV1812H, indicating current ecosystem/deployment interest.
codex reasoning notes (technical)
Local source inspection via shell `rg` showed active support for CV1800/CV1810/CV1812H/SG2000, SG2042, and SG2044 in this directory. Lore-equivalent maintenance evidence was gathered by web search because `lei` and the advertised lore MCP were unavailable: spinics thread https://www.spinics.net/lists/kernel/msg5662715.html shows SG2044 support being added in 2025; https://www.spinics.net/lists/kernel/msg5993591.html and https://www.spinics.net/lists/kernel/msg5626958.html show 2026/2025 follow-on maintenance rather than deprecation. Deployment evidence came from web-searched vendor/product pages: Milk-V SG2000 chip and Duo Module 01 pages, plus Sophgo's CV1812H Huashan Pi page. This is new and still-commercial embedded hardware with no generic replacement; deprecation/removal is not indicated.