diff --git a/boards/arduino/opta/arduino_opta-common.dtsi b/boards/arduino/opta/arduino_opta-common.dtsi
index cf276172889de..afb351894373e 100644
--- a/boards/arduino/opta/arduino_opta-common.dtsi
+++ b/boards/arduino/opta/arduino_opta-common.dtsi
@@ -201,3 +201,27 @@
 		zephyr,resolution = <16>;
 	};
 };
+
+sdhc: &sdmmc1 {
+	compatible = "st,stm32-sdio";
+	pinctrl-0 = <&sdmmc1_d0_pc8 &sdmmc1_d1_pc9
+			&sdmmc1_d2_pc10 &sdmmc1_d3_pc11
+			&sdmmc1_ck_pc12 &sdmmc1_cmd_pd2>;
+	pinctrl-names = "default";
+	sdhi-on-gpios = <&gpioj 1 GPIO_ACTIVE_HIGH>;
+	power-delay-ms = <50>;
+	interrupts = <49 0>;
+	interrupt-names = "event";
+	min-bus-freq = <DT_FREQ_K(400)>;
+	max-bus-freq = <DT_FREQ_M(208)>;
+	hw-flow-control;
+	bus-width = <4>;
+	status= "okay";
+
+	wifi: airoc-wifi {
+		status = "okay";
+		compatible = "infineon,airoc-wifi";
+		wifi-reg-on-gpios    = <&gpioj 1 GPIO_ACTIVE_HIGH>;
+		wifi-host-wake-gpios = <&gpioj 5 GPIO_ACTIVE_HIGH>;
+	};
+};
diff --git a/boards/arduino/opta/arduino_opta_stm32h747xx_m7.dts b/boards/arduino/opta/arduino_opta_stm32h747xx_m7.dts
index 7bedf04db4b9d..86908b8de4e7a 100644
--- a/boards/arduino/opta/arduino_opta_stm32h747xx_m7.dts
+++ b/boards/arduino/opta/arduino_opta_stm32h747xx_m7.dts
@@ -21,6 +21,14 @@
 		zephyr,code-partition = &slot0_partition;
 		zephyr,bt-hci = &bt_hci_uart;
 	};
+
+	ext_memory: memory@90000000 {
+		compatible = "zephyr,memory-region";
+		reg = <0x90000000 DT_SIZE_M(16)>; /* max addressable area */
+		zephyr,memory-region = "EXTMEM";
+		/* The ATTR_MPU_EXTMEM attribut causing a MPU FAULT */
+		zephyr,memory-attr = <( DT_MEM_ARM(ATTR_MPU_IO) )>;
+	};
 };
 
 zephyr_udc0: &usbotg_fs {
@@ -169,8 +177,7 @@ zephyr_udc0: &usbotg_fs {
 		size = <DT_SIZE_M(128)>; /* 128 MBits */
 		qspi-max-frequency = <80000000>;
 		jedec-id = [01 1f 89];
-		spi-bus-width = <4>;
-		quad-enable-requirements = "NONE";
+		spi-bus-width = <2>;
 		status = "okay";
 
 		/* The following partitions are valid only if the Opta external flash
diff --git a/boards/arduino/portenta_h7/arduino_portenta_h7_stm32h747xx_m7.dts b/boards/arduino/portenta_h7/arduino_portenta_h7_stm32h747xx_m7.dts
index 001d8509059e2..3a30aef0c89ba 100644
--- a/boards/arduino/portenta_h7/arduino_portenta_h7_stm32h747xx_m7.dts
+++ b/boards/arduino/portenta_h7/arduino_portenta_h7_stm32h747xx_m7.dts
@@ -45,6 +45,14 @@
 		zephyr,memory-region = "SDRAM1";
 		zephyr,memory-attr = <( DT_MEM_ARM(ATTR_MPU_RAM) )>;
 	};
+
+	ext_memory: memory@90000000 {
+		compatible = "zephyr,memory-region";
+		reg = <0x90000000 DT_SIZE_M(16)>; /* max addressable area */
+		zephyr,memory-region = "EXTMEM";
+		/* The ATTR_MPU_EXTMEM attribut causing a MPU FAULT */
+		zephyr,memory-attr = <( DT_MEM_ARM(ATTR_MPU_IO) )>;
+	};
 };
 
 &clk_hse {