Microchip AT91, SAM9, SAMA5, and SAMA7 SoC support
Vendor support code for Microchip's (formerly Atmel) AT91, SAM9, SAMA5, and SAMA7 series of ARM-based microprocessors, widely used in industrial controllers, point-of-sale gear, networking appliances, and other embedded designs from the 2000s through today. It handles SoC identification and access to the special-function registers found on SAMA5D2, SAMA5D4, and newer parts.
recommendation
It should stay because the code provides SoC identification and special-function-register access for Microchip's AT91-derived microprocessor families, which are still actively sold in 2025. Maintenance is healthy, with 2025 fixes for the SAM9X7 line and new enablement for the SAMA7D65, and Microchip lists both SAM9X75 and SAMA7D65 as in production for current embedded and industrial designs. There is no replacement driver because this code is the vendor support layer for these chips.
repository signals
sources
- lore.kernel.org
Upstream maintenance remained active in 2025 with a functional fix for sam9x7 handling in drivers/soc/atmel.
- lore.kernel.org
The directory gained new SoC enablement in 2025 via SAMA7D65 support, which argues against obsolescence or removal.
- microchip.com
Microchip listed SAM9X75 as 'Status: In Production', showing this family is still being sold for new designs in 2025/2026.
- microchip.com
Microchip listed SAMA7D65 as 'Status: In Production', confirming current-market hardware covered by this directory.
codex reasoning notes (technical)
Local shell inspection showed this is real driver/subsystem code: soc.c identifies many AT91/SAM9/SAMA5/SAMA7 SoCs and sfr.c is a platform driver for SFR nvmem on SAMA5D2/4. lore_file_timeline(tool) on soc.c and sfr.c showed recent fix/enablement traffic, including 2025 sam9x7 fixes and 2025 SAMA7D65 support, plus a 2026 cleanup conversion; no removal-oriented subjects appeared in the timeline. Web search(tool) found official Microchip product pages for SAM9X75 and SAMA7D65 marked in production, so the covered hardware is still sold and used in embedded/industrial designs. No natural replacement driver exists because this directory provides SoC identification/SFR support for these Microchip MPU families.