diff --git a/arch/arm/boot/dts/exynos4412-i9300.dts b/arch/arm/boot/dts/exynos4412-i9300.dts
index 07fbcf845c49..63451caf56f9 100644
--- a/arch/arm/boot/dts/exynos4412-i9300.dts
+++ b/arch/arm/boot/dts/exynos4412-i9300.dts
@@ -8,6 +8,7 @@
 
 /dts-v1/;
 #include "exynos4412-galaxy-s3.dtsi"
+#include "exynos4412-n7105.dtsi" // XXX lazy hack
 
 / {
 	model = "Samsung Galaxy S3 (GT-I9300) based on Exynos4412";
diff --git a/arch/arm/boot/dts/exynos4412-midas.dtsi b/arch/arm/boot/dts/exynos4412-midas.dtsi
index 7a95e7365fcb..357ee8d82d10 100644
--- a/arch/arm/boot/dts/exynos4412-midas.dtsi
+++ b/arch/arm/boot/dts/exynos4412-midas.dtsi
@@ -451,6 +451,16 @@ &dsi_0 {
 	samsung,pll-clock-frequency = <24000000>;
 };
 
+&ehci {
+	samsung,vbus-gpio = <&gpf0 7 0>;
+	status = "okay";
+
+	port@1 {
+		/* HSIC0 */
+		status = "okay";
+	};
+};
+
 &exynos_usbphy {
 	vbus-supply = <&esafeout1_reg>;
 	status = "okay";
@@ -796,6 +806,7 @@ ldo15_reg: LDO15 {
 				regulator-name = "VHSIC_1.0V";
 				regulator-min-microvolt = <1000000>;
 				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
 				regulator-state-mem {
 					regulator-on-in-suspend;
 				};
@@ -805,6 +816,7 @@ ldo16_reg: LDO16 {
 				regulator-name = "VHSIC_1.8V";
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
 				regulator-state-mem {
 					regulator-on-in-suspend;
 				};
diff --git a/arch/arm/boot/dts/exynos4412-n7105.dtsi b/arch/arm/boot/dts/exynos4412-n7105.dtsi
new file mode 100644
index 000000000000..6d3512774d10
--- /dev/null
+++ b/arch/arm/boot/dts/exynos4412-n7105.dtsi
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/pinctrl/samsung.h>
+
+&pinctrl_0 {
+	ap2mdm-err-fatal {
+		samsung,pins = "gpj0-1";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-val = <0>;
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
+		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+	};
+	ap2mdm-status {
+		samsung,pins = "gpf1-6";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-val = <0>;
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
+		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+	};
+	mdm2ap-hsic-pwr-active {
+		samsung,pins = "gpf2-2";
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
+		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+	};
+};
+
+&pinctrl_1 {
+	mdm2ap-err-fatal {
+		samsung,pins = "gpx1-2";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+	mdm2ap-status {
+		samsung,pins = "gpx0-5";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+	ap2mdm-hsic-port-active {
+		samsung,pins = "gpx3-2";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
+	};
+	mdm2ap-hsic-resume-req {
+		samsung,pins = "gpx0-6";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
+		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
+	};
+	ap2mdm-soft-reset-n {
+		samsung,pins = "gpl2-5";
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
+		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+	};
+	ap2mdm-pmic-pwr-en {
+		samsung,pins = "gpy2-3";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-val = <1>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
+		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV4>;
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
+		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+	};
+	ap2mdm-wakeup {
+		samsung,pins = "gpm2-4";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-val = <0>;
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
+		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_DOWN>;
+	};
+};
diff --git a/arch/arm/configs/replicant_defconfig b/arch/arm/configs/replicant_defconfig
index ad9f00c23827..1a00857fdfe7 100644
--- a/arch/arm/configs/replicant_defconfig
+++ b/arch/arm/configs/replicant_defconfig
@@ -212,6 +212,7 @@ CONFIG_USB_RTL8152=y
 CONFIG_USB_USBNET=y
 CONFIG_USB_NET_SMSC75XX=y
 CONFIG_USB_NET_SMSC95XX=y
+CONFIG_USB_NET_QMI_WWAN=y
 # CONFIG_WLAN_VENDOR_ADMTEK is not set
 # CONFIG_WLAN_VENDOR_ATH is not set
 # CONFIG_WLAN_VENDOR_ATMEL is not set
@@ -350,6 +351,8 @@ CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_EXYNOS=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_DWC2=y
+CONFIG_USB_SERIAL=y
+CONFIG_USB_SERIAL_QUALCOMM=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_VBUS_DRAW=500
 CONFIG_U_SERIAL_CONSOLE=y