NPU not working in OrangePi5Plus Vendor Kernel

[Ravi Terala]

Hello All.. I am trying to get rknpu working properly. I have resolute minimal install with 6.1 vendor kernel installed. Default install does not have `/dev/rknpu` and shows error with loading the rknpu driver. Can any one help resolve this? This is with fresh install of the OS on the NVME drive: There is no NPU option in the dtb list for orangepi5plus.
 

Quote

Linux opi5plus 6.1.115-vendor-rk35xx #1 SMP Mon May 18 05:13:49 UTC 2026 aarch64 GNU/Linux

 

PRETTY_NAME="Armbian 26.5.1 resolute"
NAME="Ubuntu"
VERSION_ID="26.04"
VERSION="26.04 (Resolute Raccoon)"
VERSION_CODENAME=resolute
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.armbian.com"
SUPPORT_URL="https://forum.armbian.com"
BUG_REPORT_URL="https://www.armbian.com/bugs"
PRIVACY_POLICY_URL="https://www.armbian.com"
UBUNTU_CODENAME=resolute
LOGO="armbian-logo"
ARMBIAN_PRETTY_NAME="Armbian 26.5.1 resolute"

 

This is the error in dmesg

[   15.981999] RKNPU fdab0000.npu: Adding to iommu group 0
[   15.982175] RKNPU fdab0000.npu: RKNPU: rknpu iommu is enabled, using iommu mode
[   15.982308] RKNPU fdab0000.npu: Looking up rknpu-supply from device tree
[   15.985241] RKNPU fdab0000.npu: Looking up mem-supply from device tree
[   15.988551] RKNPU fdab0000.npu: can't request region for resource [mem 0xfdab0000-0xfdabffff]
[   15.988583] RKNPU fdab0000.npu: can't request region for resource [mem 0xfdac0000-0xfdacffff]
[   15.988603] RKNPU fdab0000.npu: can't request region for resource [mem 0xfdad0000-0xfdadffff]
[   15.989174] [drm] Initialized rknpu 0.9.8 20240828 for fdab0000.npu on minor 1
[   15.993547] RKNPU fdab0000.npu: Looking up rknpu-supply from device tree
[   15.996066] RKNPU fdab0000.npu: RKNPU: bin=0
[   15.996288] RKNPU fdab0000.npu: leakage=8
[   15.996320] RKNPU fdab0000.npu: Looking up rknpu-supply from device tree
[   15.996356] debugfs: Directory 'fdab0000.npu-rknpu' with parent 'vdd_npu_s0' already present!
[   16.005738] RKNPU fdab0000.npu: pvtm=868
[   16.011925] RKNPU fdab0000.npu: pvtm-volt-sel=3
[   16.012005] RKNPU fdab0000.npu: Looking up rknpu-supply from device tree
[   16.012037] debugfs: Directory 'fdab0000.npu-rknpu' with parent 'vdd_npu_s0' already present!
[   16.012656] RKNPU fdab0000.npu: Looking up mem-supply from device tree
[   16.014725] RKNPU fdab0000.npu: avs=0
[   16.014836] RKNPU fdab0000.npu: rockchip_pvtpll_set_volt_sel: error cfg clk_id=6 voltsel (-1)
[   16.015007] RKNPU fdab0000.npu: l=15000 h=85000 hyst=5000 l_limit=0 h_limit=800000000 h_table=0

 

Edited 1 hour ago by Ravi Terala
adding detail

[Werner]

Providing logs with 

armbianmonitor -u

 helps with troubleshooting and significantly raises chances that issue gets addressed.