diff --git a/boards/st/stm32mp135f_dk/Kconfig.defconfig b/boards/st/stm32mp135f_dk/Kconfig.defconfig
new file mode 100644
index 00000000000..0a9aafe3c80
--- /dev/null
+++ b/boards/st/stm32mp135f_dk/Kconfig.defconfig
@@ -0,0 +1,15 @@
+# STM32MP135F DISCOVERY board configuration
+
+# Copyright (c) 2025 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_STM32MP135F_DK
+
+if GPIO_MCP230XX
+
+config GPIO_MCP230XX_INIT_PRIORITY
+	default I2C_INIT_PRIORITY
+
+endif # GPIO_MCP230XX
+
+endif # BOARD_STM32MP135F_DK