HCI_UART on NRF52840, attaching the device on a Yocto based Linux SBC errors out saying "Can't init device hci0: Cannot assign requested address (99)"

Question

I am trying to Interface a BLE module based on Nordic's nrf52840 to a Yocto based SBC, to which all the BlueZ related packages have been added.

I have flashed Zephyr's sample hci_uart program onto the module. The module seems to run perfectly on my Linux PC (BlueZ version 5.48), whereas on the SBC(BlueZ version 5.54) it fails to get inited. Here's the error that comes when I use

root@rb-imx6:~# hciconfig hci0 up

root@rb-imx6:~# Can't init device hci0: Cannot assign requested address (99)

Can anyone please help me out on this?

Thanks in advance.

Answer 1

The error of assigning an address is caused by missing Linux kernel configuration options:

CONFIG_CRYPTO_USER
CONFIG_CRYPTO_USER_API
CONFIG_CRYPTO_USER_API_AEAD
CONFIG_CRYPTO_USER_API_HASH

CONFIG_CRYPTO_AES
CONFIG_CRYPTO_CCM
CONFIG_CRYPTO_AEAD
CONFIG_CRYPTO_CMAC

This is likely to happen with a self-built Buildroot or Yocto Embedded Linux system. If you run into this error, you should enable above options and recompile the kernel.

See the BlueZ requirements here: https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/README#n64

To see detailed debug output from BlueZ, run it with -d option:

bluetoothd -d