diff --git a/boards/boards_legacy/arm/efm32hg_slstk3400a/Kconfig.defconfig b/boards/silabs/efm32hg_slstk3400a/Kconfig.defconfig
similarity index 84%
rename from boards/boards_legacy/arm/efm32hg_slstk3400a/Kconfig.defconfig
rename to boards/silabs/efm32hg_slstk3400a/Kconfig.defconfig
index 08b75e0857f..c15834e7229 100644
--- a/boards/boards_legacy/arm/efm32hg_slstk3400a/Kconfig.defconfig
+++ b/boards/silabs/efm32hg_slstk3400a/Kconfig.defconfig
@@ -5,9 +5,6 @@
 
 if BOARD_EFM32HG_SLSTK3400A
 
-config BOARD
-	default "efm32hg_slstk3400a"
-
 config CMU_HFXO_FREQ
 	default 24000000
 
diff --git a/boards/boards_legacy/arm/efm32hg_slstk3400a/Kconfig.board b/boards/silabs/efm32hg_slstk3400a/Kconfig.efm32hg_slstk3400a
similarity index 69%
rename from boards/boards_legacy/arm/efm32hg_slstk3400a/Kconfig.board
rename to boards/silabs/efm32hg_slstk3400a/Kconfig.efm32hg_slstk3400a
index eb3ca8af2cc..3ab1289920f 100644
--- a/boards/boards_legacy/arm/efm32hg_slstk3400a/Kconfig.board
+++ b/boards/silabs/efm32hg_slstk3400a/Kconfig.efm32hg_slstk3400a
@@ -4,6 +4,4 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_EFM32HG_SLSTK3400A
-	bool "SiLabs EFM32HG-SLSTK3400A (Happy Gecko)"
-	depends on SOC_SERIES_EFM32HG
 	select SOC_PART_NUMBER_EFM32HG322F64
diff --git a/boards/silabs/efm32hg_slstk3400a/board.yml b/boards/silabs/efm32hg_slstk3400a/board.yml
new file mode 100644
index 00000000000..8aae393fcae
--- /dev/null
+++ b/boards/silabs/efm32hg_slstk3400a/board.yml
@@ -0,0 +1,5 @@
+board:
+  name: efm32hg_slstk3400a
+  vendor: silabs
+  socs:
+  - name: efm32hg322f64
diff --git a/boards/boards_legacy/arm/efm32hg_slstk3400a/doc/efm32hg_slstk3400a.jpg b/boards/silabs/efm32hg_slstk3400a/doc/efm32hg_slstk3400a.jpg
similarity index 100%
rename from boards/boards_legacy/arm/efm32hg_slstk3400a/doc/efm32hg_slstk3400a.jpg
rename to boards/silabs/efm32hg_slstk3400a/doc/efm32hg_slstk3400a.jpg
diff --git a/boards/boards_legacy/arm/efm32hg_slstk3400a/doc/index.rst b/boards/silabs/efm32hg_slstk3400a/doc/index.rst
similarity index 100%
rename from boards/boards_legacy/arm/efm32hg_slstk3400a/doc/index.rst
rename to boards/silabs/efm32hg_slstk3400a/doc/index.rst
diff --git a/boards/boards_legacy/arm/efm32hg_slstk3400a/efm32hg_slstk3400a.dts b/boards/silabs/efm32hg_slstk3400a/efm32hg_slstk3400a.dts
similarity index 100%
rename from boards/boards_legacy/arm/efm32hg_slstk3400a/efm32hg_slstk3400a.dts
rename to boards/silabs/efm32hg_slstk3400a/efm32hg_slstk3400a.dts
diff --git a/boards/boards_legacy/arm/efm32hg_slstk3400a/efm32hg_slstk3400a.yaml b/boards/silabs/efm32hg_slstk3400a/efm32hg_slstk3400a.yaml
similarity index 100%
rename from boards/boards_legacy/arm/efm32hg_slstk3400a/efm32hg_slstk3400a.yaml
rename to boards/silabs/efm32hg_slstk3400a/efm32hg_slstk3400a.yaml
diff --git a/boards/boards_legacy/arm/efm32hg_slstk3400a/efm32hg_slstk3400a_defconfig b/boards/silabs/efm32hg_slstk3400a/efm32hg_slstk3400a_defconfig
similarity index 82%
rename from boards/boards_legacy/arm/efm32hg_slstk3400a/efm32hg_slstk3400a_defconfig
rename to boards/silabs/efm32hg_slstk3400a/efm32hg_slstk3400a_defconfig
index 834cb328d0c..957fedcc584 100644
--- a/boards/boards_legacy/arm/efm32hg_slstk3400a/efm32hg_slstk3400a_defconfig
+++ b/boards/silabs/efm32hg_slstk3400a/efm32hg_slstk3400a_defconfig
@@ -1,7 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_EFM32HG=y
-CONFIG_BOARD_EFM32HG_SLSTK3400A=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
 CONFIG_SERIAL=y