boards: silabs: Add xG29-RB4412A radio board

# Copyright (c) 2025 Silicon Laboratories Inc.

# SPDX-License-Identifier: Apache-2.0

if BOARD_XG29_RB4412A

config LOG_BACKEND_SWO_FREQ_HZ

	default 875000

	depends on LOG_BACKEND_SWO

if SOC_GECKO_USE_RAIL

config FPU

	default y

endif # SOC_GECKO_USE_RAIL

if BT

config FPU

	default y

config COMMON_LIBC_MALLOC_ARENA_SIZE

	default 8192

config MAIN_STACK_SIZE

	default 3072 if PM

	default 2304

endif # BT

endif # BOARD_XG29_RB4412A

# Copyright (c) 2025 Silicon Laboratories Inc.

# SPDX-License-Identifier: Apache-2.0

config BOARD_XG29_RB4412A

	select SOC_PART_NUMBER_EFR32MG29B140F1024IM40

# SPDX-License-Identifier: Apache-2.0

board_runner_args(jlink "--device=EFR32MG29BxxxF1024")

include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

board_runner_args(silabs_commander "--device=EFR32MG29B140F1024IM40")

include(${ZEPHYR_BASE}/boards/common/silabs_commander.board.cmake)

board:

  name: xg29_rb4412a

  full_name: EFR32xG29 2.4 GHz 8 dBm Buck (xG29-RB4412A)

  vendor: silabs

  socs:

    - name: efr32mg29b140f1024im40

.. zephyr:board:: xg29_rb4412a

Overview

********

The xG24-RB4412A radio board provides support for the Silicon Labs EFR32MG29 SoC.

Hardware

********

- EFR32MG29B140F1024IM40 SoC

- CPU core: ARM Cortex®-M33 with FPU

- Flash memory: 1024 kB

- RAM: 256 kB

- Transmit power: up to +8 dBm

- Operation frequency: 2.4 GHz

- Crystal oscillators for LFXO (32.768 kHz) and HFXO (38.4 MHz)

Supported Features

==================

The ``xg29_rb4412a`` board target supports the following hardware features:

+-----------+------------+------------------------+

| Interface | Controller | Driver/Component       |

+===========+============+========================+

| CMU       | on-chip    | clock control          |

+-----------+------------+------------------------+

| MSC       | on-chip    | flash                  |

+-----------+------------+------------------------+

| GPIO      | on-chip    | gpio, pin control      |

+-----------+------------+------------------------+

| RTCC      | on-chip    | system clock, counter  |

+-----------+------------+------------------------+

| MPU       | on-chip    | memory protection unit |

+-----------+------------+------------------------+

| NVIC      | on-chip    | interrupt controller   |

+-----------+------------+------------------------+

| USART     | on-chip    | serial, spi            |

+-----------+------------+------------------------+

| EUSART    | on-chip    | serial, spi            |

+-----------+------------+------------------------+

| I2C       | on-chip    | i2c                    |

+-----------+------------+------------------------+

| LDMA      | on-chip    | dma                    |

+-----------+------------+------------------------+

| WDOG      | on-chip    | watchdog               |

+-----------+------------+------------------------+

| SE        | on-chip    | entropy                |

+-----------+------------+------------------------+

| RADIO     | on-chip    | bluetooth              |

+-----------+------------+------------------------+

Programming and Debugging

*************************

Applications for the ``xg29_rb4412a`` board target can be built, flashed, and debugged in the

usual way. See :ref:`build_an_application` and :ref:`application_run` for more details on

building and running.

Flashing

========

As an example, this section shows how to build and flash the :zephyr:code-sample:`hello_world`

application.

To build and program the sample to the xG24-RB4412A, complete the following steps:

First, plug the xG24-RB4412A to a compatible mainboard and connect the mainboard to your computer

using the USB port on the left side.

Next, build and flash the sample by running the following command:

.. zephyr-app-commands::

   :zephyr-app: samples/hello_world

   :board: xg29_rb4412a

   :goals: build flash

``west flash`` will by default use SEGGER JLink. Make sure that the JLinkExe binary is available on

the PATH. Alternatively, use ``west flash -r silabs_commander`` to use Simplicity Commander to flash.

In this case, make sure that the commander binary is available on PATH.

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! xg29_rb4412a

Bluetooth

=========

To use the BLE function, run the command below to retrieve necessary binary

blobs from the SiLabs HAL repository.

.. code-block:: console

   west blobs fetch hal_silabs

Then build the Zephyr kernel and a Bluetooth sample with the following

command. The :zephyr:code-sample:`bluetooth_observer` sample application is used in

this example.

.. zephyr-app-commands::

   :zephyr-app: samples/bluetooth/observer

   :board: xg29_rb4412a

   :goals: build