Zephyr main efr32bg22 support

CODEOWNERS

@@ -50,6 +50,7 @@
 /soc/arm/rpi_pico/                        @yonsch
 /soc/arm/silabs_exx32/efm32pg1b/          @rdmeneze
 /soc/arm/silabs_exx32/efr32mg21/          @l-alfred
+/soc/arm/silabs_exx32/efr32bg22/          @sateeshkotapati
 /soc/arm/st_stm32/                        @erwango
 /soc/arm/st_stm32/*/power.c               @FRASTM
 /soc/arm/st_stm32/stm32mp1/               @arnopo
@@ -492,6 +493,7 @@
 /dts/arm/silabs/efm32pg1b*                @rdmeneze
 /dts/arm/silabs/efr32mg21*                @l-alfred
 /dts/arm/silabs/efr32fg13*                @yonsch
+/dts/arm/silabs/efr32bg22*                @sateeshkotapati
 /dts/riscv/                               @kgugala @pgielda
 /dts/riscv/ite/                           @ite
 /dts/riscv/microsemi/microsemi-miv.dtsi   @galak

boards/arm/efr32bg_sltb010a/CMakeLists.txt

@@ -0,0 +1,7 @@
+# Copyright (c) 2021 Sateesh Kotapati
+# SPDX-License-Identifier: Apache-2.0
+
+if(CONFIG_UART_GECKO)
+  zephyr_library()
+  zephyr_library_sources(board.c)
+endif()

boards/arm/efr32bg_sltb010a/Kconfig

@@ -0,0 +1,12 @@
+# EFR32BG SLTB010A board
+
+# Copyright (c) 2022, Silicon Labs
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_EFR32BG_SLTB010A
+
+module = BOARD_EFR32BG22
+module-str = Board Control
+source "subsys/logging/Kconfig.template.log_config"
+
+endif # BOARD_EFR32BG_SLTB010A

boards/arm/efr32bg_sltb010a/Kconfig.board

@@ -0,0 +1,9 @@
+# EFR32BG SLTB010A board
+
+# Copyright (c) 2021, Sateesh Kotapati
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_EFR32BG_SLTB010A
+	bool "SiLabs EFR32BG-SLTB010A (Thunderboard BG22)"
+	depends on SOC_SERIES_EFR32BG22
+	select SOC_PART_NUMBER_EFR32BG22C224F512IM40

boards/arm/efr32bg_sltb010a/Kconfig.defconfig

@@ -0,0 +1,21 @@
+# EFR32BG SLTB010A board
+
+# Copyright (c) 2021, Sateesh Kotapati
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_EFR32BG_SLTB010A
+
+config BOARD
+	default "efr32bg_sltb010a"
+
+config CMU_HFXO_FREQ
+	default 40000000
+
+config CMU_LFXO_FREQ
+	default 32768
+
+config UART_GECKO
+	default y
+	depends on SERIAL
+
+endif # BOARD_EFR32BG_SLTB010A

boards/arm/efr32bg_sltb010a/board.c

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2021 Sateesh Kotapati
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/init.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/sys/printk.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_REGISTER(efr32bg_sltb010a, CONFIG_BOARD_EFR32BG22_LOG_LEVEL);
+
+static int efr32bg_sltb010a_init(const struct device *dev)
+{
+	const struct gpio_dt_spec vcen_dev =
+		GPIO_DT_SPEC_GET(DT_ALIAS(vcomenable), gpios);
+
+	ARG_UNUSED(dev);
+
+	if (!device_is_ready(vcen_dev.port)) {
+		LOG_ERR("Virtual COM Port Enable device was not found!\n");
+		return -ENODEV;
+	}
+	gpio_pin_configure_dt(&vcen_dev, GPIO_OUTPUT_HIGH);
+
+	return 0;
+}
+
+/* needs to be done after GPIO driver init */
+SYS_INIT(efr32bg_sltb010a_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);

boards/arm/efr32bg_sltb010a/board.cmake

@@ -0,0 +1,7 @@
+# Copyright (c) 2021, Sateesh Kotapati
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+board_runner_args(jlink "--device=EFR32BG22C224F512IM40" "--reset-after-load")
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/arm/efr32bg_sltb010a/doc/index.rst

@@ -0,0 +1,184 @@
+.. _efr32bg_sltb010a:
+
+EFR32BG-SLTB010A
+################
+
+Overview
+********
+
+The EFR32™ Blue Gecko Starter Kit EFR32BG-SLTB010A (a.k.a Thunderboard EFR32BG22)
+contains a MCU from the EFR32BG family built on ARM® Cortex®-M33F
+processor with low power capabilities.
+
+.. image:: ./efr32bg_sltb010a.jpg
+   :align: center
+   :alt: EFR32BG-SLTB010A
+
+Hardware
+********
+
+- EFR32BG22 Blue Gecko Wireless SoC with upto 76.8 MHz operating frequency
+- ARM® Cortex® M33 core with 32 kB RAM and 512 kB Flash
+- Macronix ultra low power 8-Mbit SPI flash (MX25R8035F)
+- 2.4 GHz ceramic antenna for wireless transmission
+- Silicon Labs Si7021 relative humidity and temperature sensor
+- Silicon Labs Si1133 UV index and ambient light sensor
+- Silicon Labs Si7210 hall effect sensor
+- TDK InvenSense ICM-20648 6-axis inertial sensor
+- One LED and one push button
+- Power enable signals and isolation switches for ultra low power operation
+- On-board SEGGER J-Link debugger for easy programming and debugging, which
+  includes a USB virtual COM port and Packet Trace Interface (PTI)
+- Mini Simplicity connector for access to energy profiling and advanced wireless
+  network debugging
+- Breakout pads for GPIO access and connection to external hardware
+- Reset button
+- Automatic switch-over between USB and battery power
+- CR2032 coin cell holder and external battery connector
+
+For more information about the EFR32BG SoC and Thunderboard EFR32BG22
+(EFR32BG-SLTB010A) board:
+
+- `EFR32BG22 Website`_
+- `EFR32BG22 Datasheet`_
+- `EFR32xG22 Reference Manual`_
+- `EFR32BG22-SLTB010A Website`_
+- `EFR32BG22-SLTB010A User Guide`_
+- `EFR32BG22-SLTB010A Schematics`_
+
+Supported Features
+==================
+
+The efr32bg_sltb010a board configuration supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| MPU       | on-chip    | memory protection unit              |
++-----------+------------+-------------------------------------+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| SYSTICK   | on-chip    | systick                             |
++-----------+------------+-------------------------------------+
+| COUNTER   | on-chip    | stimer                              |
++-----------+------------+-------------------------------------+
+| FLASH     | on-chip    | flash memory                        |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| UART      | on-chip    | serial                              |
++-----------+------------+-------------------------------------+
+| WATCHDOG  | on-chip    | watchdog                            |
++-----------+------------+-------------------------------------+
+| TRNG      | on-chip    | true random number generator        |
++-----------+------------+-------------------------------------+
+
+The default configuration can be found in the defconfig file:
+``boards/arm/efr32bg_sltb010a/efr32bg_sltb010a_defconfig``.
+
+Other hardware features are currently not supported by the port.
+
+Connections and IOs
+===================
+
+The EFR32BG SoC has six gpio controllers (PORTA, PORTB, PORTC, PORTD,
+PORTE and PORTF).
+
+In the following table, the column Name contains Pin names. For example, PE2
+means Pin number 2 on PORTE and #27 represents the location bitfield , as used
+in the board's and microcontroller's datasheets and manuals.
+
++------+-------------+-----------------------------------+
+| Name | Function    | Usage                             |
++======+=============+===================================+
+| PB0  | GPIO        | LED0 (RED)                        |
++------+-------------+-----------------------------------+
+| PB1  | GPIO        | SW0 Push Button PB0               |
++------+-------------+-----------------------------------+
+| PA5  | UART_TX     | UART TX Console VCOM_TX US1_TX #1 |
++------+-------------+-----------------------------------+
+| PA6  | UART_RX     | UART RX Console VCOM_RX US1_RX #1 |
++------+-------------+-----------------------------------+
+
+System Clock
+============
+
+The EFR32BG SoC is configured to use the 38.4 MHz external oscillator on the
+board.
+
+Serial Port
+===========
+
+The EFR32BG22 SoC has two USARTs.
+USART1 is connected to the board controller and is used for the console.
+
+Programming and Debugging
+*************************
+
+.. note::
+   Before using the kit the first time, you should update the J-Link firmware
+   from `J-Link-Downloads`_
+
+Flashing
+========
+
+The EFR32BG-SLTB010A 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 Mass Storage and a
+  USB Serial Port.
+- A Serial Flash device, which implements the USB flash disk file storage.
+- A physical UART connection which is relayed over interface USB Serial port.
+
+Flashing an application to EFR32BG-SLTB010A
+-------------------------------------------
+
+The sample application :ref:`hello_world` is used for this example.
+Build the Zephyr kernel and application:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: efr32bg_sltb010a
+   :goals: build
+
+Connect the EFR32BG-SLTB010A to your host computer using the USB port and you
+should see a USB connection.
+
+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 be able to see on the corresponding Serial Port
+the following message:
+
+.. code-block:: console
+
+   Hello World! efr32bg_sltb010a
+
+
+.. _EFR32BG22-SLTB010A Website:
+   https://www.silabs.com/development-tools/thunderboard/thunderboard-bg22-kit
+
+.. _EFR32BG22-SLTB010A User Guide:
+   https://www.silabs.com/documents/public/user-guides/ug415-sltb010a-user-guide.pdf
+
+.. _EFR32BG22-SLTB010A Schematics:
+   https://www.silabs.com/documents/public/schematic-files/BRD4184A-A01-schematic.pdf
+
+.. _EFR32BG22 Website:
+   https://www.silabs.com/wireless/bluetooth/efr32bg22-series-2-socs
+
+.. _EFR32BG22 Datasheet:
+   https://www.silabs.com/documents/public/data-sheets/efr32bg22-datasheet.pdf
+
+.. _EFR32xG22 Reference Manual:
+   https://www.silabs.com/documents/public/reference-manuals/efr32xg22-rm.pdf
+
+.. _J-Link:
+   https://www.segger.com/jlink-debug-probes.html
+
+.. _J-Link-Downloads:
+   https://www.segger.com/downloads/jlink