boards: arm: Add support for SiLabs EFR32BG13 BRD4104A board

This commit adds support for Silicon Labs BRD4104A (a.k.a. SLWRB4104A)
Blue Gecko and BRD4250B (a.k.a. SLWRB4250B) Flex Gecko Radio Boards.

Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>

boards/arm/efr32_radio/CMakeLists.txt

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: Apache-2.0
+
+if(CONFIG_UART_GECKO)
+  zephyr_library()
+  zephyr_library_sources(board.c)
+  zephyr_library_include_directories(${ZEPHYR_BASE}/drivers)
+endif()

boards/arm/efr32_radio/Kconfig

@@ -0,0 +1,18 @@
+# EFR32 radio board configuration
+
+# Copyright (c) 2020 Piotr Mienkowski
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_EFR32_RADIO
+	bool
+
+if BOARD_EFR32_RADIO
+
+config BOARD_INIT_PRIORITY
+	int
+	default KERNEL_INIT_PRIORITY_DEFAULT
+	help
+	  Board initialization priority. This must be bigger than
+	  GPIO_GECKO_COMMON_INIT_PRIORITY.
+
+endif # BOARD_EFR32_RADIO

boards/arm/efr32_radio/Kconfig.board

@@ -0,0 +1,16 @@
+# EFR32BG13 BRD4104A board
+
+# Copyright (c) 2020 Piotr Mienkowski
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_EFR32_RADIO_BRD4104A
+	bool "Silicon Labs BRD4104A (Blue Gecko Radio Board)"
+	depends on SOC_SERIES_EFR32BG13P
+	select BOARD_EFR32_RADIO
+	select SOC_PART_NUMBER_EFR32BG13P632F512GM48
+
+config BOARD_EFR32_RADIO_BRD4250B
+	bool "Silicon Labs BRD4250B (Flex Gecko Radio Board)"
+	depends on SOC_SERIES_EFR32FG1P
+	select BOARD_EFR32_RADIO
+	select SOC_PART_NUMBER_EFR32FG1P133F256GM48

boards/arm/efr32_radio/Kconfig.defconfig

@@ -0,0 +1,61 @@
+# EFR32 radio board
+
+# Copyright (c) 2020 Piotr Mienkowski
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_EFR32_RADIO
+
+config BOARD
+	default "efr32_radio_brd4104a" if BOARD_EFR32_RADIO_BRD4104A
+	default "efr32_radio_brd4250b" if BOARD_EFR32_RADIO_BRD4250B
+
+config CMU_HFXO_FREQ
+	default 38400000
+
+config CMU_LFXO_FREQ
+	default 32768
+
+if LOG_BACKEND_SWO
+
+config LOG_BACKEND_SWO_FREQ_HZ
+	default 875000
+
+endif # LOG_BACKEND_SWO
+
+if GPIO_GECKO
+
+config GPIO_GECKO_PORTA
+	default y
+
+config GPIO_GECKO_PORTB
+	default y
+
+config GPIO_GECKO_PORTC
+	default y
+
+config GPIO_GECKO_PORTD
+	default y
+
+config GPIO_GECKO_PORTE
+	default n
+
+config GPIO_GECKO_PORTF
+	default y
+
+endif # GPIO_GECKO
+
+if SERIAL
+
+config UART_GECKO
+	default y
+
+endif # SERIAL
+
+if COUNTER
+
+config COUNTER_GECKO_RTCC
+	default y
+
+endif # COUNTER
+
+endif # BOARD_EFR32_RADIO

boards/arm/efr32_radio/board.c

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2018 Christian Taedcke
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <init.h>
+#include <drivers/gpio.h>
+#include <sys/printk.h>
+
+/* This pin is used to enable the serial port using the board controller */
+#define VCOM_ENABLE_GPIO_NAME  DT_GPIO_GECKO_PORTA_NAME
+#define VCOM_ENABLE_GPIO_PIN   5
+
+static int efr32_radio_init(struct device *dev)
+{
+	struct device *vce_dev; /* Virtual COM Port Enable GPIO Device */
+
+	ARG_UNUSED(dev);
+
+	/* Enable the board controller to be able to use the serial port */
+	vce_dev = device_get_binding(VCOM_ENABLE_GPIO_NAME);
+	if (!vce_dev) {
+		printk("Virtual COM Port Enable device was not found!\n");
+		return -ENODEV;
+	}
+
+	gpio_pin_configure(vce_dev, VCOM_ENABLE_GPIO_PIN, GPIO_OUTPUT_HIGH);
+
+	return 0;
+}
+
+/* needs to be done after GPIO driver init */
+SYS_INIT(efr32_radio_init, PRE_KERNEL_1, CONFIG_BOARD_INIT_PRIORITY);

boards/arm/efr32_radio/board.cmake

@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(openocd)
+
+if(CONFIG_BOARD_EFR32_RADIO_BRD4104A)
+board_runner_args(jlink "--device=EFR32BG13PxxxF512")
+elseif(CONFIG_BOARD_EFR32_RADIO_BRD4250B)
+board_runner_args(jlink "--device=EFR32FG1PxxxF256")
+endif()
+
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/arm/efr32_radio/doc/brd4104a.rst

@@ -0,0 +1,124 @@
+.. _efr32_radio_brd4104a:
+
+EFR32 BRD4104A (SLWRB4104A)
+###########################
+
+Overview
+********
+
+The EFR32BG13 Blue Gecko Bluetooth® Low Energy Radio Board is one of the two
+radio boards delivered with `SLWSTK6020B Bluetooth SoC Starter Kit`_. It
+contains a Wireless System-On-Chip from the EFR32BG13 family built on an
+ARM Cortex®-M4F processor with excellent low power capabilities.
+
+.. figure:: ./efr32bg13-slwrb4104a.jpg
+   :height: 260px
+   :align: center
+   :alt: SLWRB4104A Blue Gecko Bluetooth® Low Energy Radio Board
+
+   SLWRB4104A (image courtesy of Silicon Labs)
+
+The BRD4104A a.k.a. SLWRB4104A radio board plugs into the Wireless Starter Kit
+Mainboard BRD4001A and is supported as one of :ref:`efr32_radio`.
+
+Hardware
+********
+
+- EFR32BG13P632F512GM48 Blue Gecko SoC
+- CPU core: ARM Cortex®-M4 with FPU
+- Flash memory: 512 kB
+- RAM: 64 kB
+- Transmit power: up to +10 dBm
+- Operation frequency: 2.4 GHz
+- 8Mbit SPI NOR Flash
+- Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz).
+
+For more information about the EFR32BG13 SoC and BRD4104A board, refer to these
+documents:
+
+- `EFR32BG13 Website`_
+- `EFR32BG13 Datasheet`_
+- `EFR32xG13 Reference Manual`_
+- `SLWSTK6020B Bluetooth SoC Starter Kit`_
+- `BRD4104A User Guide`_
+- `BRD4104A Reference Manual`_
+- `EFR32BG13-BRD4104A Schematics`_
+
+Supported Features
+==================
+
+Please refer to
+:ref:`EFR32 Radio Board Supported Features <efr32_radio_supported_features>`
+for details of the configuration and common features supported by the
+efr32_radio_brd4104a board.
+
+The default configuration can be found in the defconfig file:
+
+	``boards/arm/efr32_radio/efr32_radio_brd4104a_defconfig``
+
+System Clock
+============
+
+The EFR32BG13P SoC is configured to use the 38.4 MHz external oscillator on the
+board.
+
+Serial Port
+===========
+
+The EFR32BG13P SoC has three USARTs and one Low Energy UARTs (LEUART).
+USART0 is connected to the board controller and is used for the console.
+
+Programming and Debugging
+*************************
+
+Please refer to
+:ref:`Programming and Debugging EFR32 Radio Board <efr32_radio_programming>`
+for details on the supported debug interfaces.
+
+Flashing
+========
+
+Connect the BRD4001A board with a mounted BRD4104A radio module to your host
+computer using the USB port.
+
+Here is an example for the :ref:`hello_world` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: efr32_radio_brd4104a
+   :goals: flash
+
+Open a serial terminal (minicom, putty, etc.) with the following settings:
+
+- Speed: 115200
+- Data: 8 bits
+- Parity: None
+- Stop bits: 1
+
+Reset the board and you should see the following message in the terminal:
+
+.. code-block:: console
+
+   Hello World! efr32_radio_brd4104a
+
+
+.. _EFR32BG13 Website:
+   https://www.silabs.com/wireless/bluetooth/efr32bg13-series-1-socs
+
+.. _EFR32BG13 Datasheet:
+   https://www.silabs.com/documents/public/data-sheets/efr32bg13-datasheet.pdf
+
+.. _EFR32xG13 Reference Manual:
+   https://www.silabs.com/documents/public/reference-manuals/efr32xg13-rm.pdf
+
+.. _SLWSTK6020B Bluetooth SoC Starter Kit:
+   https://www.silabs.com/products/development-tools/wireless/bluetooth/blue-gecko-bluetooth-low-energy-soc-starter-kit
+
+.. _BRD4104A User Guide:
+   https://www.silabs.com/documents/public/user-guides/ug279-brd4104a-user-guide.pdf
+
+.. _BRD4104A Reference Manual:
+   https://www.silabs.com/documents/public/reference-manuals/brd4104a-rm.pdf
+
+.. _EFR32BG13-BRD4104A Schematics:
+   https://www.silabs.com/documents/public/schematic-files/EFR32BG13-BRD4104A-A00-schematic.pdf

boards/arm/efr32_radio/doc/brd4250b.rst

@@ -0,0 +1,123 @@
+.. _efr32_radio_brd4250b:
+
+EFR32 BRD4250B (SLWRB4250B)
+###########################
+
+Overview
+********
+
+The EFR32FG1 Flex Gecko 2.4 GHz and 868 MHz Radio Board is delivered as part of
+`SLWSTK6061B Proprietary Wireless Starter Kit`_. It contains a EFR32FG1 Wireless
+SoC built on an ARM Cortex®-M4F processor with excellent low power capabilities.
+
+.. figure:: ./efr32fg1-slwrb4250b.jpg
+   :height: 262px
+   :align: center
+   :alt: SLWRB4250B Flex Gecko 2.4 GHz and 868 MHz Radio Board
+
+   SLWRB4250B (image courtesy of Silicon Labs)
+
+The BRD4250B a.k.a. SLWRB4250B radio board plugs into the Wireless Starter Kit
+Mainboard BRD4001A and is supported as one of :ref:`efr32_radio`.
+
+Hardware
+********
+
+- EFR32FG1P133F256GM48 Flex Gecko SoC
+- CPU core: ARM Cortex®-M4 with FPU
+- Flash memory: 256 kB
+- RAM: 32 kB
+- Transmit power: up to +13 dBm
+- Operation frequency: 2.4 GHz, 868 MHz
+- 8Mbit SPI NOR Flash
+- Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz).
+
+For more information about the EFR32FG1 SoC and BRD4250B board, refer to these
+documents:
+
+- `EFR32FG1 Website`_
+- `EFR32FG1 Datasheet`_
+- `EFR32xG1 Reference Manual`_
+- `SLWSTK6061B Proprietary Wireless Starter Kit`_
+- `BRD4250B User Guide`_
+- `BRD4250B Reference Manual`_
+- `EFR32FG1-BRD4250B Schematics`_
+
+Supported Features
+==================
+
+Please refer to
+:ref:`EFR32 Radio Board Supported Features <efr32_radio_supported_features>`
+for details of the configuration and common features supported by the
+efr32_radio_brd4250b board.
+
+The default configuration can be found in the defconfig file:
+
+	``boards/arm/efr32_radio/efr32_radio_brd4250b_defconfig``
+
+System Clock
+============
+
+The EFR32FG1P SoC is configured to use the 38.4 MHz external oscillator on the
+board.
+
+Serial Port
+===========
+
+The EFR32FG1P SoC has two USARTs and one Low Energy UARTs (LEUART).
+USART0 is connected to the board controller and is used for the console.
+
+Programming and Debugging
+*************************
+
+Please refer to
+:ref:`Programming and Debugging EFR32 Radio Board <efr32_radio_programming>`
+for details on the supported debug interfaces.
+
+Flashing
+========
+
+Connect the BRD4001A board with a mounted BRD4250B radio module to your host
+computer using the USB port.
+
+Here is an example for the :ref:`hello_world` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: efr32_radio_brd4250b
+   :goals: flash
+
+Open a serial terminal (minicom, putty, etc.) with the following settings:
+
+- Speed: 115200
+- Data: 8 bits
+- Parity: None
+- Stop bits: 1
+
+Reset the board and you should see the following message in the terminal:
+
+.. code-block:: console
+
+   Hello World! efr32_radio_brd4250b
+
+
+.. _EFR32FG1 Website:
+   https://www.silabs.com/products/wireless/proprietary/efr32-flex-gecko-2-4-ghz-sub-ghz
+
+.. _EFR32FG1 Datasheet:
+   https://www.silabs.com/documents/public/data-sheets/efr32fg1-datasheet.pdf
+
+.. _EFR32xG1 Reference Manual:
+   https://www.silabs.com/documents/public/reference-manuals/efr32xg1-rm.pdf
+
+.. _SLWSTK6061B Proprietary Wireless Starter Kit:
+   https://www.silabs.com/products/development-tools/wireless/proprietary/slwstk6061b-efr32-flex-gecko-868-mhz-2-4-ghz-and-sub-ghz-starter-kit
+
+.. _BRD4250B User Guide:
+   https://www.silabs.com/documents/public/user-guides/ug182-brd4250b-user-guide.pdf
+
+.. _BRD4250B Reference Manual:
+   https://www.silabs.com/documents/public/reference-manuals/brd4250b-rm.pdf
+
+.. _EFR32FG1-BRD4250B Schematics:
+   https://www.silabs.com/documents/public/schematic-files/efr32fg1-brd4250b-b02-schematic.pdf

boards/arm/efr32_radio/doc/index.rst

@@ -0,0 +1,173 @@
+.. _efr32_radio:
+
+EFR32 Radio Boards
+##################
+
+.. toctree::
+   :maxdepth: 1
+
+   brd4104a.rst
+   brd4250b.rst
+
+Overview
+********
+
+Support for EFR32 Radio boards is provided by one of the starter kits
+
+- `SLWSTK6020B Bluetooth SoC Starter Kit`_
+- `SLWSTK6000B Mighty Gecko Wireless Starter Kit`_
+- `SLWSTK6061B Proprietary Wireless Starter Kit`_
+
+.. figure:: ./efr32_slwstk6020b.jpg
+   :width: 490px
+   :align: center
+   :alt: SLWSTK6020B Bluetooth SoC Starter Kit
+
+   SLWSTK6020B (image courtesy of Silicon Labs)
+
+Hardware
+********
+
+Wireless Starter Kit Mainboard:
+
+- Advanced Energy Monitoring provides real-time information about the energy
+  consumption of an application or prototype design.
+- Ultra-low power 128x128 pixel memory LCD
+- 2 user buttons and 2 LEDs
+- Si7021 Humidity and Temperature Sensor
+- On-board Segger J-Link USB and Ethernet debugger
+
+For more information about the BRD4001A board, refer to these documents:
+
+- `EFR32BG13 Blue Gecko Bluetooth Starter Kit User's Guide`_
+- `WSTK Main Board BRD4001A Schematics`_
+
+.. _efr32_radio_supported_features:
+
+Supported Features
+==================
+
+The board configuration supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| SYSTICK   | on-chip    | systick                             |
++-----------+------------+-------------------------------------+
+| COUNTER   | on-chip    | rtcc                                |
++-----------+------------+-------------------------------------+
+| FLASH     | on-chip    | flash memory                        |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| UART      | on-chip    | serial port-polling;                |
+|           |            | serial port-interrupt               |
++-----------+------------+-------------------------------------+
+| SPI(M)    | on-chip    | spi port-polling                    |
++-----------+------------+-------------------------------------+
+| WATCHDOG  | on-chip    | watchdog                            |
++-----------+------------+-------------------------------------+
+
+Other hardware features are currently not supported by the port.
+
+Connections and IOs
+===================
+
+In the following table, the column **Name** contains Pin names. For example, PA2
+means Pin number 2 on PORTA, as used in the board's datasheets and manuals.
+
++-------+-------------+-------------------------------------+
+| Name  | Function    | Usage                               |
++=======+=============+=====================================+
+| PF4   | GPIO        | LED0                                |
++-------+-------------+-------------------------------------+
+| PF5   | GPIO        | LED1                                |
++-------+-------------+-------------------------------------+
+| PF6   | GPIO        | Push Button PB0                     |
++-------+-------------+-------------------------------------+
+| PF7   | GPIO        | Push Button PB1                     |
++-------+-------------+-------------------------------------+
+| PA5   | GPIO        | Board Controller Enable             |
+|       |             | EFM_BC_EN                           |
++-------+-------------+-------------------------------------+
+| PA0   | USART0_TX   | UART Console EFM_BC_TX US0_TX #0    |
++-------+-------------+-------------------------------------+
+| PA1   | USART0_RX   | UART Console EFM_BC_RX US0_RX #0    |
++-------+-------------+-------------------------------------+
+| PC6   | SPI_MOSI    | Flash MOSI US1_TX #11               |
++-------+-------------+-------------------------------------+
+| PC7   | SPI_MISO    | Flash MISO US1_RX #11               |
++-------+-------------+-------------------------------------+
+| PC8   | SPI_SCLK    | Flash SCLK US1_CLK #11              |
++-------+-------------+-------------------------------------+
+| PA4   | SPI_CS      | Flash Chip Select (GPIO)            |
++-------+-------------+-------------------------------------+
+
+.. _efr32_radio_programming:
+
+Programming and Debugging
+*************************
+
+The BRD4001A includes an `J-Link`_ serial and debug adaptor built into the
+board. The adaptor provides:
+
+- A USB connection to the host computer, which exposes a debug interface and a
+  USB Serial Port.
+- A physical UART connection which is relayed over interface USB Serial port.
+- An Ethernet connection to support remote debugging.
+
+It is compatible with the following host debug tools:
+
+- :ref:`openocd-debug-host-tools`
+- :ref:`jlink-debug-host-tools`
+
+OpenOCD is included in the Zephyr SDK. Refer to the links above for information
+on how to install required host debug tools if you are not using the Zephyr SDK.
+
+Flashing
+========
+
+Connect the BRD4001A main board with the mounted radio module to your host
+computer using the USB port.
+
+Following example shows how to build the :ref:`hello_world` application for
+BRD4104A radio module.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: efr32_radio_brd4104a
+   :goals: flash
+
+Open a serial terminal (minicom, putty, etc.) with the following settings:
+
+- Speed: 115200
+- Data: 8 bits
+- Parity: None
+- Stop bits: 1
+
+Reset the board and you should see the following message in the terminal:
+
+.. code-block:: console
+
+   Hello World! efr32_radio_brd4104a
+
+
+.. _SLWSTK6020B Bluetooth SoC Starter Kit:
+   https://www.silabs.com/products/development-tools/wireless/bluetooth/blue-gecko-bluetooth-low-energy-soc-starter-kit
+
+.. _SLWSTK6000B Mighty Gecko Wireless Starter Kit:
+   https://www.silabs.com/products/development-tools/wireless/mesh-networking/mighty-gecko-starter-kit
+
+.. _SLWSTK6061B Proprietary Wireless Starter Kit:
+   https://www.silabs.com/products/development-tools/wireless/proprietary/slwstk6061b-efr32-flex-gecko-868-mhz-2-4-ghz-and-sub-ghz-starter-kit
+
+.. _EFR32BG13 Blue Gecko Bluetooth Starter Kit User's Guide:
+   https://www.silabs.com/documents/public/user-guides/ug279-brd4104a-user-guide.pdf
+
+.. _WSTK Main Board BRD4001A Schematics:
+   https://www.silabs.com/documents/public/schematic-files/WSTK-Main-BRD4001A-A01-schematic.pdf
+
+.. _J-Link:
+   https://www.segger.com/jlink-debug-probes.html

boards/arm/efr32_radio/efr32_radio.dtsi

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2020 Piotr Mienkowski
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,console = &usart0;
+		zephyr,shell-uart = &usart0;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+	};
+
+	/* These aliases are provided for compatibility with samples */
+	aliases {
+		led0 = &led0;
+		led1 = &led1;
+		sw0 = &button0;
+		sw1 = &button1;
+		watchdog0 = &wdog0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led0: led_0 {
+			gpios = <&gpiof 4 0>;
+			label = "LED 0";
+		};
+		led1: led_1 {
+			gpios = <&gpiof 5 0>;
+			label = "LED 1";
+		};
+	};
+
+	buttons {
+		compatible = "gpio-keys";
+		button0: button_0 {
+			/* gpio flags need validation */
+			gpios = <&gpiof 6 GPIO_ACTIVE_LOW>;
+			label = "User Push Button 0";
+		};
+		button1: button_1 {
+			/* gpio flags need validation */
+			gpios = <&gpiof 7 GPIO_ACTIVE_LOW>;
+			label = "User Push Button 1";
+		};
+	};
+
+};
+
+&usart0 {
+	current-speed = <115200>;
+	location-rx = <GECKO_LOCATION(0) GECKO_PORT_A GECKO_PIN(1)>;
+	location-tx = <GECKO_LOCATION(0) GECKO_PORT_A GECKO_PIN(0)>;
+	status = "okay";
+};
+
+&usart1 {
+	compatible = "silabs,gecko-spi-usart";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	location-rx = <GECKO_LOCATION(11) GECKO_PORT_C GECKO_PIN(7)>;
+	location-tx = <GECKO_LOCATION(11) GECKO_PORT_C GECKO_PIN(6)>;
+	location-clk = <GECKO_LOCATION(11) GECKO_PORT_C GECKO_PIN(8)>;
+
+	cs-gpios = <&gpioa 4 0>;
+
+	status = "okay";
+
+	mx25r80: mx25r8035f@0 {
+		compatible = "jedec,spi-nor";
+		label = "MX25R8035F";
+		reg = <0>;
+		spi-max-frequency = <33000000>;
+		size = <0x800000>;
+		has-be32k;
+		jedec-id = [c2 28 14];
+	};
+};
+
+&rtcc0 {
+	prescaler = <1>;
+	status = "okay";
+};
+
+&gpio {
+	location-swo = <0>;
+	status = "okay";
+};
+
+&wdog0 {
+	status = "okay";
+};

boards/arm/efr32_radio/efr32_radio_brd4104a.dts

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2020 Piotr Mienkowski
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <silabs/efr32bg13p632f512gm48.dtsi>
+#include "efr32_radio.dtsi"
+
+/ {
+	model = "Silicon Labs BRD4104A (Blue Gecko Radio Board)";
+	compatible = "silabs,efr32_radio_brd4104a", "silabs,efr32bg13p";
+
+};
+
+&cpu0 {
+	clock-frequency = <38400000>;
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* Reserve 32 kB for the bootloader */
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 0x00008000>;
+			read-only;
+		};
+
+		/* Reserve 220 kB for the application in slot 0 */
+		slot0_partition: partition@8000 {
+			label = "image-0";
+			reg = <0x0008000 0x00037000>;
+		};
+
+		/* Reserve 220 kB for the application in slot 1 */
+		slot1_partition: partition@3f000 {
+			label = "image-1";
+			reg = <0x0003f000 0x00037000>;
+		};
+
+		/* Reserve 32 kB for the scratch partition */
+		scratch_partition: partition@76000 {
+			label = "image-scratch";
+			reg = <0x00076000 0x00008000>;
+		};
+
+		/* Set 8Kb of storage at the end of the 512KB of flash */
+		storage_partition: partition@7e000 {
+			label = "storage";
+			reg = <0x0007e000 0x00002000>;
+		};
+
+	};
+};

boards/arm/efr32_radio/efr32_radio_brd4104a.yaml

@@ -0,0 +1,21 @@
+identifier: efr32_radio_brd4104a
+name: BRD4104A
+type: mcu
+arch: arm
+ram: 64
+flash: 512
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - counter
+  - gpio
+  - nvs
+  - spi
+  - uart
+  - watchdog
+testing:
+  ignore_tags:
+    - net
+    - bluetooth

boards/arm/efr32_radio/efr32_radio_brd4104a_defconfig

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_ARM_MPU=y
+CONFIG_SOC_SERIES_EFR32BG13P=y
+CONFIG_BOARD_EFR32_RADIO_BRD4104A=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_CORTEX_M_SYSTICK=y
+CONFIG_GPIO=y
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=38400000
+CONFIG_CMU_HFCLK_HFXO=y
+CONFIG_SOC_GECKO_EMU_DCDC=y
+CONFIG_SOC_GECKO_EMU_DCDC_MODE_ON=y

boards/arm/efr32_radio/efr32_radio_brd4250b.dts

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2020 Piotr Mienkowski
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <silabs/efr32fg1p133f256gm48.dtsi>
+#include "efr32_radio.dtsi"
+
+/ {
+	model = "Silicon Labs BRD4250B (Flex Gecko Radio Board)";
+	compatible = "silabs,efr32_radio_brd4250b", "silabs,efr32fg1p";
+
+};
+
+&cpu0 {
+	clock-frequency = <38400000>;
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* Reserve 32 kB for the bootloader */
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 0x00008000>;
+			read-only;
+		};
+
+		/* Reserve 94 kB for the application in slot 0 */
+		slot0_partition: partition@8000 {
+			label = "image-0";
+			reg = <0x0008000 0x00017800>;
+		};
+
+		/* Reserve 94 kB for the application in slot 1 */
+		slot1_partition: partition@1f800 {
+			label = "image-1";
+			reg = <0x0001f800 0x00017800>;
+		};
+
+		/* Reserve 32 kB for the scratch partition */
+		scratch_partition: partition@37000 {
+			label = "image-scratch";
+			reg = <0x00037000 0x00008000>;
+		};
+
+		/* Set 4Kb of storage at the end of the 256Kb of flash */
+		storage_partition: partition@3f000 {
+			label = "storage";
+			reg = <0x0003f000 0x00001000>;
+		};
+
+	};
+};

boards/arm/efr32_radio/efr32_radio_brd4250b.yaml

@@ -0,0 +1,21 @@
+identifier: efr32_radio_brd4250b
+name: BRD4250B
+type: mcu
+arch: arm
+ram: 32
+flash: 256
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - counter
+  - gpio
+  - nvs
+  - spi
+  - uart
+  - watchdog
+testing:
+  ignore_tags:
+    - net
+    - bluetooth

boards/arm/efr32_radio/efr32_radio_brd4250b_defconfig

@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_SERIES_EFR32FG1P=y
+CONFIG_BOARD_EFR32_RADIO_BRD4250B=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_CORTEX_M_SYSTICK=y
+CONFIG_GPIO=y
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=38400000
+CONFIG_CMU_HFCLK_HFXO=y
+CONFIG_SOC_GECKO_EMU_DCDC=y
+CONFIG_SOC_GECKO_EMU_DCDC_MODE_ON=y

boards/arm/efr32_radio/support/openocd.cfg

@@ -0,0 +1,25 @@
+if {[info exists env(OPENOCD_INTERFACE)]} {
+	set INTERFACE $env(OPENOCD_INTERFACE)
+} else {
+	# By default connect over Debug USB port using the J-Link interface
+	set INTERFACE "jlink"
+}
+
+source [find interface/$INTERFACE.cfg]
+
+transport select swd
+
+set CHIPNAME efr32
+
+source [find target/efm32.cfg]
+
+$_TARGETNAME configure -event gdb-attach {
+	echo "Debugger attaching: halting execution"
+	reset halt
+	gdb_breakpoint_override hard
+}
+
+$_TARGETNAME configure -event gdb-detach {
+	echo "Debugger detaching: resuming execution"
+	resume
+}