modules: openthread: New OpenThread radio implementation for nRF

Implemented the new OpenThread radio implementation for the
nRF Connect platform.
The new radio implementation is based on the nRF IEEE802.15.4 radio
driver and does not use Zephyr's IEEE802.15.4 shim layer.
In this solution, the Zephyr's networking L2 layer is disabled, and
radio packets are passed directly to the nRF radio.

Prepared a build environment to support building OpenThread without
Zephyr's L2 and IEEE802.15.4 shim layers.

To use the new radio implementation, the CONFIG_NET_L2_OPENTHREAD
Kconfig must be set to `n`.

Signed-off-by: Adrian Gielniewski <adrian.gielniewski@nordicsemi.no>
Signed-off-by: Arkadiusz Balys <arkadiusz.balys@nordicsemi.no>

Author: ArekBalysNordic

modules/openthread/Kconfig

@@ -11,4 +11,8 @@ menu "OpenThread stack nrf features"
 rsource "Kconfig.features.nrf"
 endmenu
 
+menu "NRF5 radio configuration"
+rsource "Kconfig.nrf5"
+endmenu
+
 endif # OPENTHREAD

modules/openthread/Kconfig.features.nrf

@@ -1,7 +1,7 @@
 # SDK-nrf-specific OpenThread stack features for selection
 
 # Copyright (c) 2025 Nordic Semiconductor ASA
-# SPDX-License-Identifier: Apache-2.0
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 
 choice OPENTHREAD_PSA_NVM_BACKEND
 	prompt "Backend to store persistent crypto materials"

modules/openthread/Kconfig.nrf5

@@ -0,0 +1,70 @@
+# Copyright (c) 2025 Nordic Semiconductor ASA
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+if !NET_L2_OPENTHREAD
+
+config NRF5_SELECTIVE_TXCHANNEL
+	bool "Support for selective TX channel setting"
+	help
+	  Enable support for selectively setting TX channel for every timed transmission request.
+
+config NRF5_CARRIER_FUNCTIONS
+	bool "Support for carrier functions"
+	default y if OPENTHREAD_DIAG
+	help
+	  Enable support for functions such as modulated carrier and continuous carrier.
+
+config NRF5_VENDOR_OUI_ENABLE
+	bool "Support setting Vendor Organizationally Unique Identifier"
+	help
+	  This option enables setting custom vendor
+	  OUI using NRF5_VENDOR_OUI . After enabling,
+	  user is obliged to set NRF5_VENDOR_OUI value,
+	  as this option has no default value.
+
+if NRF5_VENDOR_OUI_ENABLE
+
+config NRF5_VENDOR_OUI
+	int "Vendor Organizationally Unique Identifier"
+	help
+	  Custom vendor OUI, which makes 24 most-significant
+	  bits of MAC address
+
+endif # NRF5_VENDOR_OUI_ENABLE
+
+config NRF5_UICR_EUI64_ENABLE
+	bool "Support usage of EUI64 value stored in UICR registers"
+	depends on !NRF5_VENDOR_OUI_ENABLE
+	depends on SOC_SERIES_NRF52X || SOC_SERIES_NRF53X || SOC_SERIES_NRF54LX
+	help
+	  This option enables setting custom vendor EUI64 value
+	  stored in User information configuration registers (UICR).
+	  Notice that this disables the default setting of EUI64
+	  value from Factory information configuration registers
+	  (FICR).
+
+if NRF5_UICR_EUI64_ENABLE
+
+config NRF5_UICR_EUI64_REG
+	int "UICR base register for the EUI64 value"
+	range 0 30 if SOC_SERIES_NRF52X
+	range 0 190 if SOC_SERIES_NRF53X
+	range 0 318 if SOC_SERIES_NRF54LX
+	default 0
+	help
+	  Base of the two consecutive registers from the UICR customer
+	  section in which custom EUI64 is stored.
+
+endif # NRF5_UICR_EUI64_ENABLE
+
+config NRF5_LOG_RX_FAILURES
+	bool "Frame reception failures logging"
+	help
+	  There are few cases where the frame reception failure can happen because of
+	  internal cause. These cases are reported forward by general code error.
+
+	  This options enables logging the reason of frame reception failure.
+	  It can be helpful for the network traffic analyze but it generates also
+	  a lot of log records in a stress environment.
+
+endif # !NET_L2_OPENTHREAD

modules/openthread/platform/CMakeLists.txt

@@ -16,6 +16,10 @@ zephyr_library_sources(
 if(NOT CONFIG_HDLC_RCP_IF)
   # Radio platform implementation dedicated for L2 Platform adaptation layer
   zephyr_library_sources_ifdef(CONFIG_NET_L2_OPENTHREAD ${ZEPHYR_BASE}/modules/openthread/platform/radio.c)
+
+  # Radio platform implementation dedicated for nrf-sdk
+  zephyr_library_sources_ifndef(CONFIG_NET_L2_OPENTHREAD radio_nrf5.c)
+
   zephyr_library_sources(${ZEPHYR_BASE}/modules/openthread/platform/spi.c)
 endif()