Arm Ethos-U65 and Ethos-U85 microNPU accelerators
Arm's Ethos-U65 and Ethos-U85 are small neural processing units (microNPUs) licensed as IP blocks for embedded and edge-AI devices, used to accelerate machine-learning inference on microcontroller-class and low-power Linux systems. They are current Arm products aimed at new edge-AI designs rather than mass-market PCs or servers.
recommendation
It should stay because the driver was only just added upstream in late 2025 and is still receiving active maintenance into 2026, with Arm continuing to sell Ethos-U65 and U85 as current IP for new edge-AI products. Deployments are niche today, but no alternative in-tree driver covers this hardware, so removal would simply orphan a freshly landed accelerator.
repository signals
sources
- lkml.org
The driver was added upstream in late 2025 as "accel: Add Arm Ethos-U NPU driver", so it is a newly introduced in-tree driver rather than legacy code.
- spinics.net
As of April 1, 2026 there were still maintenance patches touching drivers/accel/ethosu, here adding an ARM/ARM64 hardware dependency hint in Kconfig.
- spinics.net
Rob Herring replied "Applied, thanks." on April 2, 2026, showing active upstream maintenance rather than deprecation/removal.
- spinics.net
A March/April 2026 scheduler API update included drivers/accel/ethosu/ethosu_job.c and carried an Acked-by from Rob Herring, indicating ongoing treewide upkeep for the driver.
- cateee.net
LKDDb lists CONFIG_DRM_ACCEL_ARM_ETHOSU for Arm Ethos-U65/U85 NPUs and compatible strings arm,ethos-u65 and arm,ethos-u85 in 6.19 and HEAD.
- developer.arm.com
Arm's Ethos-U65 product brief describes it as a current microNPU product for embedded devices, supporting new edge-AI deployments.
- developer.arm.com
Arm still markets Ethos-U85 as a current processor/IP product, supporting the conclusion that covered hardware remains current rather than obsolete.
- developer.arm.com
Arm's October 24, 2024 blog discusses active software enablement and upcoming platforms around Ethos-U85, consistent with ongoing/new deployments.
codex reasoning notes (technical)
Keep. Search results were obtained via web search because lore-http MCP/lei were unavailable in this environment. LKML result shows the driver only landed in 2025; Spinics kernel/dri-devel/amd-gfx pages show active 2026 maintenance and no removal/deprecation thread surfaced in searched results, so any removal claim would be unsupported. Arm product pages/product brief/blog indicate U65/U85 are current Arm IP blocks aimed at new edge/embedded AI designs, but these are niche embedded NPUs rather than mass PC/server devices, so deployments today are low. No natural in-tree replacement exists for the same hardware; this is the hardware-specific upstream driver.