linux-drivers/
drivers/clk/renesas

Renesas R-Car and RZ SoC clock controllers

Clock and reset controller support for Renesas system-on-chip families, including the automotive R-Car series, the RZ/G, RZ/V, and RZ/T microprocessor lines, and older R-Mobile and SuperH parts. These chips are widely used in cars, industrial gateways, and embedded HMI systems, with new members still being launched in 2025.

keep conf=0.93 deploy=medium replacement=none subsystem=clk category=infrastructure
93%

recommendation

It should stay because Renesas is still shipping new silicon that depends on it: the RZ/G3E MPU launched in July 2025 and the R-Car V4H automotive chip remains an active product. Maintenance is visibly healthy too, with patches to the shared CPG/MSSR clock code still flowing on the linux-clk list and being backported into CIP stable as recently as 2026.

repository signals

61 files
22,982 source lines
529 commits, 5y
+14,934 / −3,934 lines added / removed, 5y
54 authors, 5y
monthly commits · 2021-04-21 → 2026-04-21 · 529 total · active in 58/61 months
2021 2022 2023 2024 2025 2026 2021-04: 7 commits · +86 −51 2021-05: 3 commits · +4 −7 2021-06: 18 commits · +1,204 −111 2021-07: 7 commits · +198 −4 2021-08: 2 commits · +2 −4 2021-09: 9 commits · +175 −3 2021-10: 5 commits · +298 −87 2021-11: 17 commits · +216 −260 2021-12: 8 commits · +660 −345 2022-01: 3 commits · +11 −1 2022-02: 4 commits · +258 −192 2022-03: 3 commits · +22 −3 2022-04: 27 commits · +1,183 −82 2022-05: 20 commits · +352 −89 2022-06: 12 commits · +109 −93 2022-07: 3 commits · +16 −1 2022-08: 3 commits · +10 −0 2022-09: 10 commits · +29 −4 2022-10: 16 commits · +62 −41 2022-11: 9 commits · +36 −15 2022-12: 7 commits · +263 −9 2023-01: 5 commits · +36 −7 2023-02: 11 commits · +60 −178 2023-03: 7 commits · +549 −206 2023-04: 0 commits · +0 −0 2023-05: 3 commits · +4 −7 2023-06: 9 commits · +76 −49 2023-07: 7 commits · +20 −12 2023-08: 1 commit · +2 −3 2023-09: 16 commits · +188 −105 2023-10: 6 commits · +600 −53 2023-11: 3 commits · +20 −23 2023-12: 2 commits · +54 −15 2024-01: 12 commits · +422 −37 2024-02: 6 commits · +12 −0 2024-03: 4 commits · +8 −3 2024-04: 9 commits · +331 −34 2024-05: 5 commits · +7 −12 2024-06: 6 commits · +49 −5 2024-07: 28 commits · +1,238 −203 2024-08: 4 commits · +307 −3 2024-09: 4 commits · +24 −9 2024-10: 7 commits · +63 −75 2024-11: 5 commits · +279 −1 2024-12: 11 commits · +585 −135 2025-01: 15 commits · +155 −8 2025-02: 10 commits · +77 −31 2025-03: 8 commits · +127 −50 2025-04: 12 commits · +340 −15 2025-05: 16 commits · +1,355 −727 2025-06: 17 commits · +281 −34 2025-07: 3 commits · +87 −2 2025-08: 11 commits · +232 −169 2025-09: 16 commits · +225 −81 2025-10: 19 commits · +908 −37 2025-11: 17 commits · +478 −82 2025-12: 6 commits · +290 −1 2026-01: 4 commits · +22 −20 2026-02: 3 commits · +70 −70 2026-03: 0 commits · +0 −0 2026-04: 0 commits · +0 −0

sources

  1. lore.kernel.org

    Mainline-facing maintenance for the shared Renesas CPG/MSSR clock code was still landing on linux-clk in March 2026.

  2. lore.kernel.org

    Renesas clock code was still being actively backported and reviewed in CIP stable work in April 2026, indicating ongoing deployed users.

  3. renesas.com

    Renesas launched the RZ/G3E MPU on July 29, 2025, showing this driver family still covers newly introduced silicon in 2025.

  4. renesas.com

    Renesas lists RZ/G3E as Active on its product page.

  5. renesas.com

    Renesas lists the R-Car V4H automotive SoC as Active, confirming current-production R-Car coverage by this driver directory.

codex reasoning notes (technical)

Local shell inspection of Kconfig/file names shows this directory is the Renesas SoC clock driver set spanning R-Car and multiple current RZ families. lore_activity on drivers/clk/renesas/renesas-cpg-mssr.c returned multiple 2026 linux-clk/CIP patches with lore_url evidence, so upstream and downstream maintenance is clearly active. A lore_file_timeline query on the directory path returned no matches, and a lore_regex removal query timed out; a fallback lei public-inbox query could not run in this sandbox, so removal-talk evidence is limited, but the provided static commit history plus 2026 lore traffic strongly argues against deprecation. Renesas product/news pages were obtained via web search and show active/current 2025-2026 RZ/G3E and R-Car V4H parts, so there is no natural successor driver and no obsolescence case for this directory.