In the OPS register description, as well as in the files modules/hal/nordic/nrfx/mdk/nrf5340_application.h and nrf5340_network.h the HFCLKAUDIOALWAYSRUN register is incorrectly marked as read-only.This contradicts the OPS operational description where it is stated that this register must be written to enable always on operation.
current header files:
__IM uint32_t HFCLKAUDIOALWAYSRUN; /*!< (@ 0x0000057C) Automatic or manual control of HFCLKAUDIO
should be:
__IOM uint32_t HFCLKAUDIOALWAYSRUN; /*!< (@ 0x0000057C) Automatic or manual control of HFCLKAUDIO
Forgot to add - this is using latest NCS from github