HyperBus and HyperFlash memory controllers
A subsystem for HyperBus, a high-speed 8-bit memory interface originally created by Cypress (now Infineon) and used to attach HyperFlash NOR flash and HyperRAM chips to embedded SoCs. The stack covers Texas Instruments AM65x HyperBus memory controllers and the Renesas RPC-IF interface, typically found in industrial and automotive boards from the late 2010s onward.
recommendation
It should stay in the kernel because the hardware is still being sold for new designs in 2025: TI continues to list AM65x SoCs as current products and Infineon's HyperFlash parts have planned availability into the 2030s. The code is also actively maintained, with bug fixes and stable backports landing for both the TI and Renesas variants in 2024 and 2025. Real-world deployment is niche and concentrated in embedded and industrial systems, but there is no sign of abandonment.
repository signals
sources
- lore.kernel.org
File-level lore activity shows the directory was still being touched in 2025 upstream, indicating the driver is maintained rather than abandoned.
- lore.kernel.org
A 2025 stable backport fixes an OF node reference leak in hbmc-am654, showing real bug-fix traffic and downstream relevance.
- lore.kernel.org
A 2024 stable backport adds a missing MODULE_DEVICE_TABLE for rpc-if, showing continued maintenance for the Renesas side as well.
- ti.com
TI still lists AM65x devices as current products, supporting that AM65x HyperBus-capable SoCs remain available for new designs.
- infineon.com
Infineon still lists HyperFlash parts as active/preferred with planned availability into the 2030s, indicating the attached memory ecosystem is not obsolete.
codex reasoning notes (technical)
Local exec_command on Kconfig and sources showed this is a real HyperBus/HyperFlash driver stack for TI AM65x HBMC and Renesas RPC-IF, not a helper library. lore_file_timeline on the directory path returned no matches, so I used mcp__lore_http__.lore_activity on the three .c files instead; those yielded 2024-2025 upstream/stable fixes and cleanups, with no removal signal in the gathered lore evidence. TI and Infineon product URLs were obtained via web.search_query and show currently marketed SoC/memory parts, so the hardware looks niche embedded/industrial but still sold; that supports keep, with low current deployment rather than deprecate/remove.