OpenThread can't find TRNG driver on nRF5340

[Gunzter]

Describe the bug
While trying to to build the Echo Server Example for the nRF5340DK board the compilation fail. With message "#error OpenThread requires an entropy source for a TRNG". The issue seems rooted in Devicetree to me, but I am a complete newbie to Zephyr-OS.

To Reproduce
cd zephyrproject/zephyr
west build -p auto -b nrf5340dk_nrf5340_cpuapp samples/net/sockets/echo_server -- -DCONF_FILE="prj.conf overlay-ot.conf"

Building this example would be the first step in a research project using TF-M and OpenThread, so unfortunately this issue looks like a showstopper.

Logs and console output

west build -p auto -b nrf5340dk_nrf5340_cpuapp samples/net/sockets/echo_server -- -DCONF_FILE="prj.conf overlay-ot.conf"
-- west build: generating a build system
Including boilerplate (Zephyr base (cached)): /home/martin/workspace/zephyrproject/zephyr/cmake/app/boilerplate.cmake
-- Application: /home/martin/workspace/zephyrproject/zephyr/samples/net/sockets/echo_server
-- Zephyr version: 2.6.0-rc1 (/home/martin/workspace/zephyrproject/zephyr), build: v2.6.0-rc1-262-gaa8e34302a18
-- Found west (found suitable version "0.11.0", minimum required is "0.7.1")
-- Board: nrf5340dk_nrf5340_cpuapp
-- Cache files will be written to: /home/martin/.cache/zephyr
-- Using toolchain: zephyr 0.12.4 (/home/martin/zephyr-sdk-0.12.4)
-- Found dtc: /home/martin/zephyr-sdk-0.12.4/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.5.0", minimum required is "1.4.6")
-- Found BOARD.dts: /home/martin/workspace/zephyrproject/zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpuapp.dts
-- Generated zephyr.dts: /home/martin/workspace/zephyrproject/zephyr/build/zephyr/zephyr.dts
-- Generated devicetree_unfixed.h: /home/martin/workspace/zephyrproject/zephyr/build/zephyr/include/generated/devicetree_unfixed.h
-- Generated device_extern.h: /home/martin/workspace/zephyrproject/zephyr/build/zephyr/include/generated/device_extern.h
Parsing /home/martin/workspace/zephyrproject/zephyr/samples/net/sockets/echo_server/Kconfig
Loaded configuration '/home/martin/workspace/zephyrproject/zephyr/build/zephyr/.config'
Configuration saved to '/home/martin/workspace/zephyrproject/zephyr/build/zephyr/.config'
Kconfig header saved to '/home/martin/workspace/zephyrproject/zephyr/build/zephyr/include/generated/autoconf.h'
CMake Warning at ../../../../subsys/random/CMakeLists.txt:11 (message):
  

      Warning: CONFIG_TEST_RANDOM_GENERATOR is not a truly random generator.
      This capability is not secure and it is provided for testing purposes only.
      Use it carefully.


CMake Deprecation Warning at /home/martin/workspace/zephyrproject/modules/lib/civetweb/CMakeLists.txt:2 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- libmetal version: 1.0.0 (/home/martin/workspace/zephyrproject/zephyr/samples/net/sockets/echo_server)
-- Build type:  
-- Host:    Linux/x86_64
-- Target:  Generic/arm
-- Machine: cortexm
-- open-amp version: 1.0.0 (/home/martin/workspace/zephyrproject/modules/lib/open-amp/open-amp)
-- Host:    Linux/x86_64
-- Target:  Generic/arm
-- Machine: cortexm
-- C_FLAGS :  -Wall -Wextra
-- OpenThread Source Directory: /home/martin/workspace/zephyrproject/modules/lib/openthread
-- Package Name: OPENTHREAD
-- Setting default package version: gcdb957090
-- Package Version: gcdb957090
-- Configuring done
CMake Warning (dev) at ../../../../cmake/linker/ld/target.cmake:33 (add_custom_command):
  Policy CMP0116 is not set: Ninja generators transform DEPFILEs from
  add_custom_command().  Run "cmake --help-policy CMP0116" for policy
  details.  Use the cmake_policy command to set the policy and suppress this
  warning.
Call Stack (most recent call first):
  ../../../../CMakeLists.txt:1198 (configure_linker_script)
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at ../../../../cmake/linker/ld/target.cmake:33 (add_custom_command):
  Policy CMP0116 is not set: Ninja generators transform DEPFILEs from
  add_custom_command().  Run "cmake --help-policy CMP0116" for policy
  details.  Use the cmake_policy command to set the policy and suppress this
  warning.
Call Stack (most recent call first):
  ../../../../CMakeLists.txt:1253 (configure_linker_script)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Generating done
-- Build files have been written to: /home/martin/workspace/zephyrproject/zephyr/build
-- west build: building application
[2/566] cd /home/martin/workspace/zephyrproject/zephyr/build/module...orkspace/zephyrproject/modules/lib/openthread/etc/cmake/print.cmake
OPENTHREAD_CONFIG_ASSERT_ENABLE=1
OPENTHREAD_CONFIG_BACKBONE_ROUTER_DUA_NDPROXYING_ENABLE=0
OPENTHREAD_CONFIG_BACKBONE_ROUTER_MULTICAST_ROUTING_ENABLE=0
OPENTHREAD_CONFIG_ENABLE_BUILTIN_MBEDTLS=0
OPENTHREAD_CONFIG_ENABLE_BUILTIN_MBEDTLS_MANAGEMENT=0
OPENTHREAD_CONFIG_PING_SENDER_ENABLE=1
OPENTHREAD_SPINEL_CONFIG_RCP_RESTORATION_MAX_COUNT=0
PACKAGE_NAME=OPENTHREAD
PACKAGE_VERSION=gcdb957090
OPENTHREAD_CONFIG_THREAD_VERSION=OT_THREAD_VERSION_1_1
OPENTHREAD_CONFIG_NCP_HDLC_ENABLE=1
KERNEL
__ZEPHYR__=1
_FORTIFY_SOURCE=2
BUILD_VERSION=v2.6.0-rc1-262-gaa8e34302a18
__LINUX_ERRNO_EXTENSIONS__
__PROGRAM_START
NRF5340_XXAA_APPLICATION
MBEDTLS_CONFIG_FILE=config-tls-generic.h
NRF_802154_USE_RAW_API=1
NRF_802154_PENDING_SHORT_ADDRESSES=
NRF_802154_PENDING_EXTENDED_ADDRESSES=
NRF_802154_RX_BUFFERS=16
NRF_802154_CCA_CORR_LIMIT_DEFAULT=
NRF_802154_CCA_CORR_THRESHOLD_DEFAULT=
NRF_802154_CCA_ED_THRESHOLD_DEFAULT=
NRF_802154_CSMA_CA_ENABLED=1
NRF_802154_TX_STARTED_NOTIFY_ENABLED=1
NRF_802154_ACK_TIMEOUT_ENABLED=1
NRF_802154_INTERNAL_RADIO_IRQ_HANDLING=0
[323/566] Building C object zephyr/CMakeFiles/zephyr.dir/drivers/ieee802154/ieee802154_nrf5.c.obj
/home/martin/workspace/zephyrproject/zephyr/drivers/ieee802154/ieee802154_nrf5.c: In function 'nrf5_get_time':
/home/martin/workspace/zephyrproject/zephyr/drivers/ieee802154/ieee802154_nrf5.c:518:9: warning: implicit declaration of function 'nrf_802154_time_get'; did you mean 'nrf_802154_tx_power_get'? [-Wimplicit-function-declaration]
  518 |  return nrf_802154_time_get();
      |         ^~~~~~~~~~~~~~~~~~~
      |         nrf_802154_tx_power_get
[368/566] Building C object zephyr/subsys/net/lib/openthread/platform/CMakeFiles/openthread_platform.dir/entropy.c.obj
FAILED: zephyr/subsys/net/lib/openthread/platform/CMakeFiles/openthread_platform.dir/entropy.c.obj 
ccache /home/martin/zephyr-sdk-0.12.4/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc -DBUILD_VERSION=v2.6.0-rc1-262-gaa8e34302a18 -DKERNEL -DMBEDTLS_CONFIG_FILE=\"config-tls-generic.h\" -DNRF5340_XXAA_APPLICATION -DNRF_802154_ACK_TIMEOUT_ENABLED=1 -DNRF_802154_CCA_CORR_LIMIT_DEFAULT="" -DNRF_802154_CCA_CORR_THRESHOLD_DEFAULT="" -DNRF_802154_CCA_ED_THRESHOLD_DEFAULT="" -DNRF_802154_CSMA_CA_ENABLED=1 -DNRF_802154_INTERNAL_RADIO_IRQ_HANDLING=0 -DNRF_802154_PENDING_EXTENDED_ADDRESSES="" -DNRF_802154_PENDING_SHORT_ADDRESSES="" -DNRF_802154_RX_BUFFERS=16 -DNRF_802154_TX_STARTED_NOTIFY_ENABLED=1 -DNRF_802154_USE_RAW_API=1 -D_FORTIFY_SOURCE=2 -D__LINUX_ERRNO_EXTENSIONS__ -D__PROGRAM_START -D__ZEPHYR__=1 -I../include -Izephyr/include/generated -I../soc/arm/nordic_nrf/nrf53 -I../lib/libc/newlib/include -I../lib/util/fnmatch/. -I../subsys/net/lib/sockets/. -I../subsys/net/lib/conn_mgr/. -I../subsys/net/lib/openthread/platform/. -I../subsys/settings/include -I/home/martin/workspace/zephyrproject/modules/hal/cmsis/CMSIS/Core/Include -I/home/martin/workspace/zephyrproject/modules/hal/nordic/nrfx -I/home/martin/workspace/zephyrproject/modules/hal/nordic/nrfx/drivers/include -I/home/martin/workspace/zephyrproject/modules/hal/nordic/nrfx/mdk -I../modules/hal_nordic/nrfx/. -Imodules/libmetal/libmetal/lib/include -I/home/martin/workspace/zephyrproject/modules/lib/open-amp/open-amp/lib/include -I/home/martin/workspace/zephyrproject/modules/crypto/mbedtls/mbedtls/include -I../modules/mbedtls/configs -I/home/martin/workspace/zephyrproject/modules/hal/nordic/drivers/nrf_802154/serialization/include -I/home/martin/workspace/zephyrproject/modules/hal/nordic/drivers/nrf_802154/serialization/include/platform -I/home/martin/workspace/zephyrproject/modules/hal/nordic/drivers/nrf_802154/serialization/include/serialization -I/home/martin/workspace/zephyrproject/modules/hal/nordic/drivers/nrf_802154/serialization/include/host -Imodules/openthread/build/etc/cmake -I/home/martin/workspace/zephyrproject/modules/lib/openthread/etc/cmake -I/home/martin/workspace/zephyrproject/modules/lib/openthread/include -isystem /home/martin/workspace/zephyrproject/modules/lib/openthread/zephyr/../include -isystem /home/martin/workspace/zephyrproject/modules/lib/openthread/zephyr/../examples/platforms -Os -imacros /home/martin/workspace/zephyrproject/zephyr/build/zephyr/include/generated/autoconf.h -ffreestanding -fno-common -g -fdiagnostics-color=always -mcpu=cortex-m33 -mthumb -mabi=aapcs -imacros /home/martin/workspace/zephyrproject/zephyr/include/toolchain/zephyr_stdint.h -Wall -Wformat -Wformat-security -Wno-format-zero-length -Wno-main -Wno-pointer-sign -Wpointer-arith -Wexpansion-to-defined -Wno-address-of-packed-member -Wno-unused-but-set-variable -Werror=implicit-int -fno-asynchronous-unwind-tables -fno-pie -fno-pic -fno-strict-overflow -fno-reorder-functions -fno-defer-pop -fmacro-prefix-map=/home/martin/workspace/zephyrproject/zephyr/samples/net/sockets/echo_server=CMAKE_SOURCE_DIR -fmacro-prefix-map=/home/martin/workspace/zephyrproject/zephyr=ZEPHYR_BASE -fmacro-prefix-map=/home/martin/workspace/zephyrproject=WEST_TOPDIR -ffunction-sections -fdata-sections -specs=nano.specs -std=c99 -MD -MT zephyr/subsys/net/lib/openthread/platform/CMakeFiles/openthread_platform.dir/entropy.c.obj -MF zephyr/subsys/net/lib/openthread/platform/CMakeFiles/openthread_platform.dir/entropy.c.obj.d -o zephyr/subsys/net/lib/openthread/platform/CMakeFiles/openthread_platform.dir/entropy.c.obj -c /home/martin/workspace/zephyrproject/zephyr/subsys/net/lib/openthread/platform/entropy.c
/home/martin/workspace/zephyrproject/zephyr/subsys/net/lib/openthread/platform/entropy.c:19:2: error: #error OpenThread requires an entropy source for a TRNG
   19 | #error OpenThread requires an entropy source for a TRNG
      |  ^~~~~
/home/martin/workspace/zephyrproject/zephyr/subsys/net/lib/openthread/platform/entropy.c: In function 'otPlatEntropyGet':
/home/martin/workspace/zephyrproject/zephyr/subsys/net/lib/openthread/platform/entropy.c:33:28: error: 'DT_CHOSEN_ZEPHYR_ENTROPY_LABEL' undeclared (first use in this function); did you mean 'DT_CHOSEN_ZEPHYR_FLASH_CONTROLLER_LABEL'?
   33 |   dev = device_get_binding(DT_CHOSEN_ZEPHYR_ENTROPY_LABEL);
      |                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                            DT_CHOSEN_ZEPHYR_FLASH_CONTROLLER_LABEL
/home/martin/workspace/zephyrproject/zephyr/subsys/net/lib/openthread/platform/entropy.c:33:28: note: each undeclared identifier is reported only once for each function it appears in
[373/566] Building C object zephyr/subsys/net/lib/openthread/platform/CMakeFiles/openthread_platform.dir/radio.c.obj
ninja: build stopped: subcommand failed.
FATAL ERROR: command exited with status 1: /usr/bin/cmake --build /home/martin/workspace/zephyrproject/zephyr/build

Environment (please complete the following information):
Ubuntu 18.04
Zephyr SDK
commit aa8e343

[rlubos]

Hi,
OpenThread won't work for nRF5340 with vanilla Zephyr, i.e. it requires CryptoCell entropy which is only availalbe in the Zephyr-based nRF Connect SDK. Please use nRF Connect SDK instead.

[carlescufi]

Closing as per @rlubos' comment.

[pawelosyp-hid]

Hi all,
Has anything changed in this topic? Driver to CryptoCell entropy or other solution for that?
btw is it possible to make multiprotocol setup (BLE and OT) ? @rlubos

[rlubos]

Has anything changed in this topic? Driver to CryptoCell entropy or other solution for that?

Nothing has changed in this regard.

btw is it possible to make multiprotocol setup (BLE and OT) ?

Yes, it is possible, but you also need NCS for that:
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_multiprotocol_support.html#ug-multiprotocol-support

[pawelosyp-hid]

Are there any chances that it will be implemented in vanilla Zephyr? Or any part of that? Thanks for responce.

[rlubos]

I don't think there are plans for that as of today.