boards: arm: Add adafruit_itsybitsy_nrf52840 board
Adds support for the Adafruit ItsyBitsy nRF52840 Express.
This board ships with the UF2 bootloader, so the device has
been set up so that Zephyr applications are flashed the
same way that other (Adafruit) firmware is flashed with the
UF2 bootloader.
This has been tested locally, and the button, blinky and
led_apa102 samples run without problems.
Signed-off-by: Embla Flatlandsmo <embla.flatlandsmo@gmail.com>
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig b/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig
new file mode 100644
index 0000000..9895b06
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig
@@ -0,0 +1,14 @@
+# Adafruit ItsyBitsy nRF52840 Express board configuration
+
+# Copyright (c) 2022 Embla Flatlandsmo <embla.flatlandsmo@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ENABLE_DCDC
+ bool "DCDC mode"
+ select SOC_DCDC_NRF52X
+ default y
+ depends on BOARD_ADAFRUIT_ITSYBITSY_NRF52840
+
+config BOARD_ENABLE_USB_CDC
+ bool "USB CDC"
+ default y
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig.board b/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig.board
new file mode 100644
index 0000000..f0a4444
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig.board
@@ -0,0 +1,8 @@
+# Adafruit ItsyBitsy nRF52840 Express board configuration
+
+# Copyright (c) 2022 Embla Flatlandsmo <embla.flatlandsmo@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_ADAFRUIT_ITSYBITSY_NRF52840
+ bool "Adafruit ItsyBitsy nRF52840 Express"
+ depends on SOC_NRF52840_QIAA
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig.defconfig b/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig.defconfig
new file mode 100644
index 0000000..964bd85
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/Kconfig.defconfig
@@ -0,0 +1,51 @@
+# Adafruit ItsyBitsy nRF52840 Express board configuration
+
+# Copyright (c) 2022 Embla Flatlandsmo <embla.flatlandsmo@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_ADAFRUIT_ITSYBITSY_NRF52840
+
+config BOARD
+ default "adafruit_itsybitsy_nrf52840"
+
+config BT_CTLR
+ default BT
+
+if BOARD_ENABLE_USB_CDC
+
+config USB_DEVICE_STACK
+ default y
+
+config USB_CDC_ACM
+ default y
+
+config UART_CONSOLE
+ default CONSOLE
+
+config USB_DEVICE_INITIALIZE_AT_BOOT
+ default y
+
+config SHELL_BACKEND_SERIAL_CHECK_DTR
+ default SHELL
+
+config USB_DEVICE_REMOTE_WAKEUP
+ default n
+
+if LOG
+
+# Set USB and CDC log level to error only
+config USB_CDC_ACM_LOG_LEVEL
+ default 1
+
+config USB_DEVICE_LOG_LEVEL
+ default 1
+
+# Wait 1500ms at startup for logging
+config LOG_PROCESS_THREAD_STARTUP_DELAY_MS
+ default 1500
+
+endif # LOG
+
+endif # BOARD_ENABLE_USB_CDC
+
+endif # BOARD_ADAFRUIT_ITSYBITSY_NRF52840
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840-pinctrl.dtsi b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840-pinctrl.dtsi
new file mode 100644
index 0000000..ea7d0e8
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840-pinctrl.dtsi
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2022 Embla Flatlandsmo <embla.flatlandsmo@gmail.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+ uart0_default: uart0_default {
+ group1 {
+ psels = <NRF_PSEL(UART_TX, 0, 24)>,
+ <NRF_PSEL(UART_RX, 0, 25)>;
+ };
+ };
+
+ uart0_sleep: uart0_sleep {
+ group1 {
+ psels = <NRF_PSEL(UART_TX, 0, 24)>,
+ <NRF_PSEL(UART_RX, 0, 25)>;
+ low-power-enable;
+ };
+ };
+
+ i2c0_default: i2c0_default {
+ group1 {
+ psels = <NRF_PSEL(TWIM_SDA, 0, 16)>,
+ <NRF_PSEL(TWIM_SCL, 0, 14)>;
+ };
+ };
+
+ i2c0_sleep: i2c0_sleep {
+ group1 {
+ psels = <NRF_PSEL(TWIM_SDA, 0, 16)>,
+ <NRF_PSEL(TWIM_SCL, 0, 14)>;
+ low-power-enable;
+ };
+ };
+
+ spi2_default: spi2_default {
+ group1 {
+ psels = <NRF_PSEL(SPIM_SCK, 1, 9)>,
+ <NRF_PSEL(SPIM_MOSI, 0, 8)>;
+ };
+ };
+
+ spi2_sleep: spi2_sleep {
+ group1 {
+ psels = <NRF_PSEL(SPIM_SCK, 1, 9)>,
+ <NRF_PSEL(SPIM_MOSI, 0, 8)>;
+ low-power-enable;
+ };
+ };
+
+ spi1_default: spi1_default {
+ group1 {
+ psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
+ <NRF_PSEL(SPIM_MOSI, 0, 15)>,
+ <NRF_PSEL(SPIM_MISO, 0, 20)>;
+ };
+ };
+
+ spi1_sleep: spi1_sleep {
+ group1 {
+ psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
+ <NRF_PSEL(SPIM_MOSI, 0, 15)>,
+ <NRF_PSEL(SPIM_MISO, 0, 20)>;
+ low-power-enable;
+ };
+ };
+
+ qspi_default: qspi_default {
+ group1 {
+ psels = <NRF_PSEL(QSPI_SCK, 0, 19)>,
+ <NRF_PSEL(QSPI_IO0, 0, 21)>,
+ <NRF_PSEL(QSPI_IO1, 0, 22)>,
+ <NRF_PSEL(QSPI_IO2, 1, 00)>,
+ <NRF_PSEL(QSPI_IO3, 0, 17)>,
+ <NRF_PSEL(QSPI_CSN, 0, 23)>;
+ };
+ };
+
+ qspi_sleep: qspi_sleep {
+ group1 {
+ psels = <NRF_PSEL(QSPI_SCK, 0, 19)>,
+ <NRF_PSEL(QSPI_IO0, 0, 21)>,
+ <NRF_PSEL(QSPI_IO1, 0, 22)>,
+ <NRF_PSEL(QSPI_IO2, 1, 00)>,
+ <NRF_PSEL(QSPI_IO3, 0, 17)>,
+ <NRF_PSEL(QSPI_CSN, 0, 23)>;
+ low-power-enable;
+ };
+ };
+};
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840.dts b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840.dts
new file mode 100644
index 0000000..2b05371
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840.dts
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2022 Embla Flatlandsmo <embla.flatlandsmo@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <nordic/nrf52840_qiaa.dtsi>
+#include "adafruit_itsybitsy_nrf52840-pinctrl.dtsi"
+
+/ {
+ model = "Adafruit ItsyBitsy nRF52840 Express";
+ compatible = "adafruit,itsybitsy-nrf52840";
+
+ chosen {
+ zephyr,console = &cdc_acm_uart0;
+ zephyr,shell-uart = &cdc_acm_uart0;
+ zephyr,uart-mcumgr = &cdc_acm_uart0;
+ zephyr,bt-mon-uart = &cdc_acm_uart0;
+ zephyr,bt-c2h-uart = &cdc_acm_uart0;
+ zephyr,sram = &sram0;
+ zephyr,flash = &flash0;
+ zephyr,code-partition = &code_partition;
+ };
+
+ leds {
+ compatible = "gpio-leds";
+ led0: led_0 {
+ gpios = <&gpio0 6 GPIO_ACTIVE_HIGH>;
+ label = "Red LED";
+ };
+ };
+
+ buttons {
+ compatible = "gpio-keys";
+ button0: button_0 {
+ gpios = <&gpio0 29 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+ label = "Push button switch";
+ };
+ };
+
+ /* These aliases are provided for compatibility with samples */
+ aliases {
+ led0 = &led0;
+ sw0 = &button0;
+ watchdog0 = &wdt0;
+ spi-flash0 = &gd25q16;
+ };
+};
+
+&adc {
+ status = "okay";
+};
+
+&gpiote {
+ status = "okay";
+};
+
+&gpio0 {
+ status = "okay";
+};
+
+&gpio1 {
+ status = "okay";
+};
+
+&uart0 {
+ compatible = "nordic,nrf-uarte";
+ current-speed = <115200>;
+ status = "disabled";
+ pinctrl-0 = <&uart0_default>;
+ pinctrl-1 = <&uart0_sleep>;
+ pinctrl-names = "default", "sleep";
+};
+
+&i2c0 {
+ compatible = "nordic,nrf-twi";
+ status = "okay";
+ pinctrl-0 = <&i2c0_default>;
+ pinctrl-1 = <&i2c0_sleep>;
+ pinctrl-names = "default", "sleep";
+};
+
+&spi1 {
+ compatible = "nordic,nrf-spi";
+ status = "okay";
+ pinctrl-0 = <&spi1_default>;
+ pinctrl-1 = <&spi1_sleep>;
+ pinctrl-names = "default", "sleep";
+};
+
+&spi2 {
+ compatible = "nordic,nrf-spi";
+ status = "okay";
+ pinctrl-0 = <&spi2_default>;
+ pinctrl-1 = <&spi2_sleep>;
+ pinctrl-names = "default", "sleep";
+ apa102: apa102@0 {
+ compatible = "apa,apa102";
+ reg = <0>;
+ spi-max-frequency = <5250000>;
+ };
+};
+
+&qspi {
+ status = "okay";
+ pinctrl-0 = <&qspi_default>;
+ pinctrl-1 = <&qspi_sleep>;
+ pinctrl-names = "default", "sleep";
+ gd25q16: gd25q16@0 {
+ compatible = "nordic,qspi-nor";
+ reg = <0>;
+ writeoc = "pp4o";
+ readoc = "read4io";
+ sck-frequency = <32000000>;
+ jedec-id = [c8 40 15];
+ size = <16777216>;
+ has-dpd;
+ t-enter-dpd = <20000>;
+ t-exit-dpd = <20000>;
+ quad-enable-requirements = "S2B1v1";
+ };
+};
+
+&flash0 {
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ /* To enable flashing with UF2 bootloader, we
+ * must reserve a partition for SoftDevice.
+ * See https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather?view=all#hathach-memory-map
+ */
+ reserved_partition_0: partition@0 {
+ label = "SoftDevice";
+ reg = <0x000000000 DT_SIZE_K(152)>;
+ };
+ code_partition: partition@26000 {
+ label = "Application";
+ reg = <0x00026000 DT_SIZE_K(796)>;
+ };
+
+ /*
+ * The flash starting at 0x000ed000 and ending at
+ * 0x000f4000 is reserved for use by the application.
+ */
+ storage_partition: partition@ed000 {
+ label = "storage";
+ reg = <0x0000ed000 DT_SIZE_K(28)>;
+ };
+
+ boot_partition: partition@f4000 {
+ label = "UF2";
+ reg = <0x000f4000 DT_SIZE_K(48)>;
+ };
+ };
+};
+
+&gd25q16 {
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ lfs_partition: partition@0 {
+ label = "lfs_storage";
+ reg = <0x00000000 DT_SIZE_M(2)>;
+ };
+ };
+};
+
+zephyr_udc0: &usbd {
+ compatible = "nordic,nrf-usbd";
+ status = "okay";
+
+ cdc_acm_uart0: cdc_acm_uart0 {
+ compatible = "zephyr,cdc-acm-uart";
+ };
+};
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840.yaml b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840.yaml
new file mode 100644
index 0000000..eba07de
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840.yaml
@@ -0,0 +1,21 @@
+identifier: adafruit_itsybitsy_nrf52840
+name: Adafruit ItsyBitsy nRF52840 Express
+type: mcu
+arch: arm
+ram: 256
+flash: 1024
+toolchain:
+ - zephyr
+ - gnuarmemb
+ - xtools
+supported:
+ - adc
+ - ble
+ - counter
+ - gpio
+ - i2c
+ - pwm
+ - spi
+ - usb_cdc
+ - usb_device
+ - watchdog
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840_defconfig b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840_defconfig
new file mode 100644
index 0000000..bc27efc
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840_defconfig
@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_SERIES_NRF52X=y
+CONFIG_SOC_NRF52840_QIAA=y
+CONFIG_BOARD_ADAFRUIT_ITSYBITSY_NRF52840=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+# enable uart driver
+CONFIG_SERIAL=y
+
+# enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# additional board options
+CONFIG_GPIO_AS_PINRESET=y
+CONFIG_PINCTRL=y
+
+# Flashing
+CONFIG_USE_DT_CODE_PARTITION=y
+CONFIG_BUILD_OUTPUT_UF2=y
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/board.cmake b/boards/arm/adafruit_itsybitsy_nrf52840/board.cmake
new file mode 100644
index 0000000..6366e47
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/board.cmake
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: Apache-2.0
+
+include(${ZEPHYR_BASE}/boards/common/bossac.board.cmake)
+board_runner_args(jlink "--device=nRF52840_xxAA" "--speed=4000")
+board_runner_args(pyocd "--target=nrf52840" "--frequency=4000000")
+include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd-nrf5.board.cmake)
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/doc/img/adafruit_itsybitsy_nrf52840.jpeg b/boards/arm/adafruit_itsybitsy_nrf52840/doc/img/adafruit_itsybitsy_nrf52840.jpeg
new file mode 100644
index 0000000..1af7426
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/doc/img/adafruit_itsybitsy_nrf52840.jpeg
Binary files differ
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/doc/index.rst b/boards/arm/adafruit_itsybitsy_nrf52840/doc/index.rst
new file mode 100644
index 0000000..699e215
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/doc/index.rst
@@ -0,0 +1,192 @@
+.. _adafruit_itsybitsy_nrf52840:
+
+Adafruit ItsyBitsy nRF52840
+###########################
+
+Overview
+********
+
+The Adafruit ItsyBitsy nRF52840 Express is a small (36 mm x 18 mm) ARM
+development board with an onboard RGB LED, USB port, 2 MB of QSPI flash,
+and range of I/O broken out onto 21 GPIO pins.
+
+This development kit has the following features:
+
+* :abbr:`ADC (Analog to Digital Converter)`
+* CLOCK
+* FLASH
+* :abbr:`GPIO (General Purpose Input Output)`
+* :abbr:`I2C (Inter-Integrated Circuit)`
+* :abbr:`I2S (Inter-Integrated Sound)`
+* :abbr:`MPU (Memory Protection Unit)`
+* :abbr:`NVIC (Nested Vectored Interrupt Controller)`
+* :abbr:`PWM (Pulse Width Modulation)`
+* :abbr:`QSPI (Quad Serial Peripheral Interface)`
+* RADIO (Bluetooth Low Energy and 802.15.4)
+* :abbr:`RTC (nRF RTC System Clock)`
+* :abbr:`SPI (Serial Peripheral Interface)`
+* :abbr:`UARTE (Universal asynchronous receiver-transmitter)`
+* :abbr:`USB (Universal Serial Bus)`
+* :abbr:`WDT (Watchdog Timer)`
+
+.. image:: img/adafruit_itsybitsy_nrf52840.jpeg
+ :align: center
+ :alt: Adafruit ItsyBitsy nRF52840 Express
+
+Hardware
+********
+- nRF52840 ARM Cortex-M4F CPU at 64MHz
+- 1 MB of flash memory and 256 KB of SRAM
+- 2 MB of QSPI flash
+- A user LED
+- A user switch
+- An RGB DotStar LED
+- Native USB port
+- One reset button
+
+Supported Features
+==================
+
+The Adafruit ItsyBitsy nRF52840 board configuration supports the
+following hardware features:
+
++-----------+------------+----------------------+
+| Interface | Controller | Driver/Component |
++===========+============+======================+
+| ADC | on-chip | adc |
++-----------+------------+----------------------+
+| CLOCK | on-chip | clock_control |
++-----------+------------+----------------------+
+| FLASH | on-chip | flash |
++-----------+------------+----------------------+
+| GPIO | on-chip | gpio |
++-----------+------------+----------------------+
+| I2C | on-chip | i2c |
++-----------+------------+----------------------+
+| MPU | on-chip | arch/arm |
++-----------+------------+----------------------+
+| NVIC | on-chip | arch/arm |
++-----------+------------+----------------------+
+| PWM | on-chip | pwm |
++-----------+------------+----------------------+
+| QSPI(M) | on-chip | nor |
++-----------+------------+----------------------+
+| RADIO | on-chip | Bluetooth, |
+| | | ieee802154 |
++-----------+------------+----------------------+
+| RTC | on-chip | system clock |
++-----------+------------+----------------------+
+| SPI | on-chip | spi |
++-----------+------------+----------------------+
+| UARTE | on-chip | serial |
++-----------+------------+----------------------+
+| USB | on-chip | usb |
++-----------+------------+----------------------+
+| WDT | on-chip | watchdog |
++-----------+------------+----------------------+
+
+Other hardware features have not been enabled yet for this board.
+
+Connections and IOs
+===================
+
+The `Adafruit ItsyBitsy nRF52840 Express Learn site`_ has detailed
+information about the board including `pinouts`_ and the `schematic`_.
+
+LED
+---
+
+* LED0 (red) = P0.06
+
+* LED1 (Adafruit DotStar)
+
+ * DATA = P0.08
+
+ * CLK = P1.09
+
+Push buttons
+------------
+
+* SWITCH = P0.29
+
+* RESET = P0.18
+
+Logging
+-------
+
+Logging is done using the USB-CDC port. See the :ref:`logger_sample`
+or the :ref:`cdc-acm-console` sample applications to see how this works.
+
+Testing LEDs and buttons on the Adafruit ItsyBitsy nRF52840 Express
+*******************************************************************
+The :ref:`button-sample` sample lets you test the buttons (switches) and the red LED.
+The :ref:`blinky-sample` sample lets you test the red LED.
+
+The DotStar LED has been implemented as a SPI device and can be tested
+with the :ref:`led_apa102_sample` sample application.
+
+You can build and flash the examples to make sure Zephyr is running correctly on
+your board. The button and LED definitions can be found in
+:zephyr_file:`boards/arm/adafruit_itsybitsy_nrf52840/adafruit_itsybitsy_nrf52840.dts`.
+
+Programming and Debugging
+*************************
+The ItsyBitsy ships with the BOSSA compatible UF2 bootloader. The
+bootloader can be entered by quickly tapping the reset button twice.
+
+First time setup
+================
+Some versions of this board were shipped with a buggy bootloader.
+Ensure that the bootloader is up to date by following the
+`Adafruit UF2 Bootloader update`_ tutorial. Note that this tutorial
+was made for the Adafruit Feather nRF52840, but the steps to update
+the bootloader are the same for the ItsyBitsy. The files for the
+ItsyBitsy bootloader can be found in the `Adafruit nRF52 Bootloader repo`_.
+
+The building and flashing of Zephyr applications have been tested with
+release 0.7.0 of the UF2 bootloader.
+
+Flashing
+========
+Flashing is done by dragging and dropping the built Zephyr UF2-file
+into the :code:`ITSY840BOOT` drive.
+
+#. Build the Zephyr kernel and the :ref:`blinky-sample`
+ sample application:
+
+ .. zephyr-app-commands::
+ :zephyr-app: samples/basic/blinky
+ :board: adafruit_itsybitsy_nrf52840
+ :goals: build
+ :compact:
+
+#. Connect the ItsyBitsy to your host computer using USB
+
+#. Tap the reset button twice quickly to enter bootloader mode
+
+#. Flash the image:
+
+ Drag and drop the file :code:`samples/basic/blinky/build/zephyr/zephyr.uf2`
+ into :code:`ITSY840BOOT`
+
+The device will disconnect and you should see the red LED blink.
+
+References
+**********
+
+.. target-notes::
+
+.. _Adafruit ItsyBitsy nRF52840 Express Learn site:
+ https://learn.adafruit.com/adafruit-itsybitsy-nrf52840-express
+
+.. _pinouts:
+ https://learn.adafruit.com/adafruit-itsybitsy-nrf52840-express/pinouts
+
+.. _schematic:
+ https://learn.adafruit.com/adafruit-itsybitsy-nrf52840-express/downloads
+
+.. _Adafruit UF2 Bootloader update:
+ https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/update-bootloader
+
+.. _Adafruit nRF52 Bootloader repo:
+ https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases
diff --git a/boards/arm/adafruit_itsybitsy_nrf52840/pre_dt_board.cmake b/boards/arm/adafruit_itsybitsy_nrf52840/pre_dt_board.cmake
new file mode 100644
index 0000000..8bdaab4
--- /dev/null
+++ b/boards/arm/adafruit_itsybitsy_nrf52840/pre_dt_board.cmake
@@ -0,0 +1,7 @@
+# Copyright (c) 2022 Embla Flatlandsmo <embla.flatlandsmo@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+# Suppress "unique_unit_address_if_enabled" to handle the following overlaps:
+# - power@40000000 & clock@40000000 & bprot@40000000
+# - acl@4001e000 & flash-controller@4001e000
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
diff --git a/tests/drivers/adc/adc_api/src/test_adc.c b/tests/drivers/adc/adc_api/src/test_adc.c
index 1614e91..4ef8df5 100644
--- a/tests/drivers/adc/adc_api/src/test_adc.c
+++ b/tests/drivers/adc/adc_api/src/test_adc.c
@@ -48,6 +48,7 @@
defined(CONFIG_BOARD_BL654_SENSOR_BOARD) || \
defined(CONFIG_BOARD_DEGU_EVK) || \
defined(CONFIG_BOARD_ADAFRUIT_FEATHER_NRF52840) || \
+ defined(CONFIG_BOARD_ADAFRUIT_ITSYBITSY_NRF52840) || \
defined(CONFIG_BOARD_RUUVI_RUUVITAG) || \
defined(CONFIG_BOARD_BT510) || \
defined(CONFIG_BOARD_PINNACLE_100_DVK) || \
