diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index faf46abaa4a2..4da1b19178ec 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -701,6 +701,7 @@ dtb-$(CONFIG_ARCH_QCOM) += \
 	qcom-msm8660-surf.dtb \
 	qcom-msm8960-cdp.dtb \
 	qcom-msm8974-lge-nexus5-hammerhead.dtb \
+	qcom-msm8974-sony-xperia-castor.dtb \
 	qcom-msm8974-sony-xperia-honami.dtb \
 	qcom-mdm9615-wp8548-mangoh-green.dtb
 dtb-$(CONFIG_ARCH_REALVIEW) += \
diff --git a/arch/arm/boot/dts/qcom-msm8974-sony-xperia-castor.dts b/arch/arm/boot/dts/qcom-msm8974-sony-xperia-castor.dts
new file mode 100644
index 000000000000..e87f2c99060d
--- /dev/null
+++ b/arch/arm/boot/dts/qcom-msm8974-sony-xperia-castor.dts
@@ -0,0 +1,641 @@
+#include "qcom-msm8974pro.dtsi"
+#include "qcom-pm8841.dtsi"
+#include "qcom-pm8941.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
+
+/ {
+	model = "Sony Xperia Z2 Tablet";
+	compatible = "sony,xperia-castor", "qcom,msm8974";
+
+	aliases {
+		serial0 = &blsp1_uart2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		input-name = "gpio-keys";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&gpio_keys_pin_a>;
+
+		volume-down {
+			label = "volume_down";
+			gpios = <&pm8941_gpios 2 GPIO_ACTIVE_LOW>;
+			linux,input-type = <1>;
+			linux,code = <KEY_VOLUMEDOWN>;
+		};
+
+		camera-snapshot {
+			label = "camera_snapshot";
+			gpios = <&pm8941_gpios 3 GPIO_ACTIVE_LOW>;
+			linux,input-type = <1>;
+			linux,code = <KEY_CAMERA>;
+		};
+
+		camera-focus {
+			label = "camera_focus";
+			gpios = <&pm8941_gpios 4 GPIO_ACTIVE_LOW>;
+			linux,input-type = <1>;
+			linux,code = <KEY_CAMERA_FOCUS>;
+		};
+
+		volume-up {
+			label = "volume_up";
+			gpios = <&pm8941_gpios 5 GPIO_ACTIVE_LOW>;
+			linux,input-type = <1>;
+			linux,code = <KEY_VOLUMEUP>;
+		};
+	};
+
+	smd {
+		rpm {
+			rpm_requests {
+				pm8941-regulators {
+					vdd_l1_l3-supply = <&pm8941_s1>;
+					vdd_l2_lvs1_2_3-supply = <&pm8941_s3>;
+					vdd_l4_l11-supply = <&pm8941_s1>;
+					vdd_l5_l7-supply = <&pm8941_s2>;
+					vdd_l6_l12_l14_l15-supply = <&pm8941_s2>;
+					vdd_l9_l10_l17_l22-supply = <&vreg_boost>;
+					vdd_l13_l20_l23_l24-supply = <&vreg_boost>;
+					vdd_l21-supply = <&vreg_boost>;
+
+					s1 {
+						regulator-min-microvolt = <1300000>;
+						regulator-max-microvolt = <1300000>;
+						regulator-always-on;
+						regulator-boot-on;
+					};
+
+					s2 {
+						regulator-min-microvolt = <2150000>;
+						regulator-max-microvolt = <2150000>;
+						regulator-boot-on;
+					};
+
+					s3 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <1800000>;
+						regulator-always-on;
+						regulator-boot-on;
+
+						regulator-system-load = <154000>;
+					};
+
+					s4 {
+						regulator-min-microvolt = <5000000>;
+						regulator-max-microvolt = <5000000>;
+					};
+
+					l1 {
+						regulator-min-microvolt = <1225000>;
+						regulator-max-microvolt = <1225000>;
+
+						regulator-always-on;
+						regulator-boot-on;
+					};
+
+					l2 {
+						regulator-min-microvolt = <1200000>;
+						regulator-max-microvolt = <1200000>;
+					};
+
+					l3 {
+						regulator-min-microvolt = <1200000>;
+						regulator-max-microvolt = <1200000>;
+					};
+
+					l4 {
+						regulator-min-microvolt = <1225000>;
+						regulator-max-microvolt = <1225000>;
+					};
+
+					l5 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <1800000>;
+					};
+
+					l6 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <1800000>;
+
+						regulator-boot-on;
+					};
+
+					l7 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <1800000>;
+
+						regulator-boot-on;
+					};
+
+					l8 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <1800000>;
+					};
+
+					l9 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <2950000>;
+					};
+
+					l11 {
+						regulator-min-microvolt = <1300000>;
+						regulator-max-microvolt = <1350000>;
+					};
+
+					l12 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <1800000>;
+
+						regulator-always-on;
+						regulator-boot-on;
+					};
+
+					l13 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <2950000>;
+
+						regulator-boot-on;
+					};
+
+					l14 {
+						regulator-min-microvolt = <1800000>;
+						regulator-max-microvolt = <1800000>;
+					};
+
+					l15 {
+						regulator-min-microvolt = <2050000>;
+						regulator-max-microvolt = <2050000>;
+					};
+
+					l16 {
+						regulator-min-microvolt = <2700000>;
+						regulator-max-microvolt = <2700000>;
+					};
+
+					l17 {
+						regulator-min-microvolt = <2700000>;
+						regulator-max-microvolt = <2700000>;
+					};
+
+					l18 {
+						regulator-min-microvolt = <2850000>;
+						regulator-max-microvolt = <2850000>;
+					};
+
+					l19 {
+						regulator-min-microvolt = <2850000>;
+						regulator-max-microvolt = <2850000>;
+					};
+
+					l20 {
+						regulator-min-microvolt = <2950000>;
+						regulator-max-microvolt = <2950000>;
+
+						regulator-allow-set-load;
+						regulator-boot-on;
+						regulator-allow-set-load;
+						regulator-system-load = <500000>;
+					};
+
+					l21 {
+						regulator-min-microvolt = <2950000>;
+						regulator-max-microvolt = <2950000>;
+
+						regulator-boot-on;
+					};
+
+					l22 {
+						regulator-min-microvolt = <3000000>;
+						regulator-max-microvolt = <3000000>;
+					};
+
+					l23 {
+						regulator-min-microvolt = <2800000>;
+						regulator-max-microvolt = <2800000>;
+					};
+
+					l24 {
+						regulator-min-microvolt = <3075000>;
+						regulator-max-microvolt = <3075000>;
+
+						regulator-boot-on;
+					};
+				};
+			};
+		};
+	};
+
+	vreg_bl_vddio: lcd-backlight-vddio {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg_bl_vddio";
+		regulator-min-microvolt = <3150000>;
+		regulator-max-microvolt = <3150000>;
+
+		gpio = <&msmgpio 69 0>;
+		enable-active-high;
+
+		vin-supply = <&pm8941_s3>;
+		startup-delay-us = <70000>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&lcd_backlight_en_pin_a>;
+	};
+
+	vreg_vsp: lcd-dcdc-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg_vsp";
+		regulator-min-microvolt = <5600000>;
+		regulator-max-microvolt = <5600000>;
+
+		gpio = <&pm8941_gpios 20 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&lcd_dcdc_en_pin_a>;
+	};
+
+	vreg_wlan: wlan-regulator {
+		compatible = "regulator-fixed";
+
+		regulator-name = "wl-reg";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&pm8941_gpios 18 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&wlan_regulator_pin>;
+	};
+};
+
+&soc {
+	sdhci@f9824900 {
+		status = "ok";
+
+		vmmc-supply = <&pm8941_l20>;
+		vqmmc-supply = <&pm8941_s3>;
+
+		bus-width = <8>;
+		non-removable;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdhc1_pin_a>;
+	};
+
+	sdhci@f9864900 {
+		status = "ok";
+
+		max-frequency = <100000000>;
+		non-removable;
+		vmmc-supply = <&vreg_wlan>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdhc3_pin_a>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		bcrmf@1 {
+			compatible = "brcm,bcm4339-fmac", "brcm,bcm4329-fmac";
+			reg = <1>;
+
+			brcm,drive-strength = <10>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&wlan_sleep_clk_pin>;
+		};
+	};
+
+	sdhci@f98a4900 {
+		status = "ok";
+
+		bus-width = <4>;
+
+		vmmc-supply = <&pm8941_l21>;
+		vqmmc-supply = <&pm8941_l13>;
+
+		cd-gpios = <&msmgpio 62 GPIO_ACTIVE_LOW>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&sdhc2_pin_a>, <&sdhc2_cd_pin_a>;
+	};
+
+	serial@f991e000 {
+		status = "ok";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&blsp1_uart2_pin_a>;
+	};
+
+	usb@f9a55000 {
+		status = "ok";
+
+		phys = <&usb_hs1_phy>;
+		phy-select = <&tcsr 0xb000 0>;
+		extcon = <&smbb>, <&usb_id>;
+		vbus-supply = <&chg_otg>;
+
+		hnp-disable;
+		srp-disable;
+		adp-disable;
+
+		ulpi {
+			phy@a {
+				status = "ok";
+
+				v1p8-supply = <&pm8941_l6>;
+				v3p3-supply = <&pm8941_l24>;
+
+				extcon = <&smbb>;
+				qcom,init-seq = /bits/ 8 <0x1 0x64>;
+			};
+		};
+	};
+
+	pinctrl@fd510000 {
+		blsp1_uart2_pin_a: blsp1-uart2-pin-active {
+			rx {
+				pins = "gpio5";
+				function = "blsp_uart2";
+
+				drive-strength = <2>;
+				bias-pull-up;
+			};
+
+			tx {
+				pins = "gpio4";
+				function = "blsp_uart2";
+
+				drive-strength = <4>;
+				bias-disable;
+			};
+		};
+
+		i2c8_pins: i2c8 {
+			mux {
+				pins = "gpio47", "gpio48";
+				function = "blsp_i2c8";
+
+				drive-strength = <2>;
+				bias-disable;
+			};
+		};
+
+		i2c11_pins: i2c11 {
+			mux {
+				pins = "gpio83", "gpio84";
+				function = "blsp_i2c11";
+
+				drive-strength = <2>;
+				bias-disable;
+			};
+		};
+
+		lcd_backlight_en_pin_a: lcd-backlight-vddio {
+			pins = "gpio69";
+			drive-strength = <10>;
+			output-low;
+			bias-disable;
+		};
+
+		sdhc1_pin_a: sdhc1-pin-active {
+			clk {
+				pins = "sdc1_clk";
+				drive-strength = <16>;
+				bias-disable;
+			};
+
+			cmd-data {
+				pins = "sdc1_cmd", "sdc1_data";
+				drive-strength = <10>;
+				bias-pull-up;
+			};
+		};
+
+		sdhc2_cd_pin_a: sdhc2-cd-pin-active {
+			pins = "gpio62";
+			function = "gpio";
+
+			drive-strength = <2>;
+			bias-disable;
+		 };
+
+		sdhc2_pin_a: sdhc2-pin-active {
+			clk {
+				pins = "sdc2_clk";
+				drive-strength = <6>;
+				bias-disable;
+			};
+
+			cmd-data {
+				pins = "sdc2_cmd", "sdc2_data";
+				drive-strength = <6>;
+				bias-pull-up;
+			};
+		};
+
+		sdhc3_pin_a: sdhc3-pin-active {
+			clk {
+				pins = "gpio40";
+				function = "sdc3";
+
+				drive-strength = <10>;
+				bias-disable;
+			};
+
+			cmd {
+				pins = "gpio39";
+				function = "sdc3";
+
+				drive-strength = <10>;
+				bias-pull-up;
+			};
+
+			data {
+				pins = "gpio35", "gpio36", "gpio37", "gpio38";
+				function = "sdc3";
+
+				drive-strength = <10>;
+				bias-pull-up;
+			};
+		};
+
+		ts_int_pin: synaptics {
+			pin {
+				pins = "gpio86";
+				function = "gpio";
+
+				drive-strength = <2>;
+				bias-disable;
+				input-enable;
+			};
+		};
+	};
+
+	i2c@f9964000 {
+		status = "ok";
+
+		clock-frequency = <355000>;
+		qcom,src-freq = <50000000>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c8_pins>;
+
+		synaptics@2c {
+			compatible = "syna,rmi-i2c";
+			reg = <0x2c>;
+
+			interrupt-parent = <&msmgpio>;
+			interrupts = <86 IRQ_TYPE_EDGE_FALLING>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			vdd-supply = <&pm8941_l22>;
+			vio-supply = <&pm8941_lvs3>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&ts_int_pin>;
+
+			rmi-f01@1 {
+				reg = <0x1>;
+				syna,nosleep = <1>;
+			};
+
+			rmi-f11@11 {
+				reg = <0x11>;
+				syna,f11-flip-x = <1>;
+				syna,sensor-type = <1>;
+			};
+		};
+	};
+
+	i2c@f9967000 {
+		status = "ok";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c11_pins>;
+		clock-frequency = <355000>;
+		qcom,src-freq = <50000000>;
+
+		lp8566_wled: backlight@2c {
+			compatible = "ti,lp8556";
+			reg = <0x2c>;
+			power-supply = <&vreg_bl_vddio>;
+
+			bl-name = "backlight";
+			dev-ctrl = /bits/ 8 <0x05>;
+			init-brt = /bits/ 8 <0x3f>;
+			rom_a0h {
+				rom-addr = /bits/ 8 <0xa0>;
+				rom-val = /bits/ 8 <0xff>;
+			};
+			rom_a1h {
+				rom-addr = /bits/ 8 <0xa1>;
+				rom-val = /bits/ 8 <0x3f>;
+			};
+			rom_a2h {
+				rom-addr = /bits/ 8 <0xa2>;
+				rom-val = /bits/ 8 <0x20>;
+			};
+			rom_a3h {
+				rom-addr = /bits/ 8 <0xa3>;
+				rom-val = /bits/ 8 <0x5e>;
+			};
+			rom_a4h {
+				rom-addr = /bits/ 8 <0xa4>;
+				rom-val = /bits/ 8 <0x02>;
+			};
+			rom_a5h {
+				rom-addr = /bits/ 8 <0xa5>;
+				rom-val = /bits/ 8 <0x04>;
+			};
+			rom_a6h {
+				rom-addr = /bits/ 8 <0xa6>;
+				rom-val = /bits/ 8 <0x80>;
+			};
+			rom_a7h {
+				rom-addr = /bits/ 8 <0xa7>;
+				rom-val = /bits/ 8 <0xf7>;
+			};
+			rom_a9h {
+				rom-addr = /bits/ 8 <0xa9>;
+				rom-val = /bits/ 8 <0x80>;
+			};
+			rom_aah {
+				rom-addr = /bits/ 8 <0xaa>;
+				rom-val = /bits/ 8 <0x0f>;
+			};
+			rom_aeh {
+				rom-addr = /bits/ 8 <0xae>;
+				rom-val = /bits/ 8 <0x0f>;
+			};
+		};
+	};
+};
+
+&spmi_bus {
+	pm8941@0 {
+		charger@1000 {
+			qcom,fast-charge-safe-current = <1500000>;
+			qcom,fast-charge-current-limit = <1500000>;
+			qcom,dc-current-limit = <1800000>;
+			qcom,fast-charge-safe-voltage = <4400000>;
+			qcom,fast-charge-high-threshold-voltage = <4350000>;
+			qcom,fast-charge-low-threshold-voltage = <3400000>;
+			qcom,auto-recharge-threshold-voltage = <4200000>;
+			qcom,minimum-input-voltage = <4300000>;
+		};
+
+		gpios@c000 {
+			gpio_keys_pin_a: gpio-keys-active {
+				pins = "gpio2", "gpio5";
+				function = "normal";
+
+				bias-pull-up;
+				power-source = <PM8941_GPIO_S3>;
+			};
+
+			wlan_sleep_clk_pin: wl-sleep-clk {
+				pins = "gpio17";
+				function = "func2";
+
+				output-high;
+				power-source = <PM8941_GPIO_S3>;
+			};
+
+			wlan_regulator_pin: wl-reg-active {
+				pins = "gpio18";
+				function = "normal";
+
+				bias-disable;
+				power-source = <PM8941_GPIO_S3>;
+			};
+
+			lcd_dcdc_en_pin_a: lcd-dcdc-en-active {
+				pins = "gpio20";
+				function = "normal";
+
+				bias-disable;
+				power-source = <PM8941_GPIO_S3>;
+				input-disable;
+				output-low;
+			};
+
+		};
+
+		coincell@2800 {
+			status = "ok";
+			qcom,rset-ohms = <2100>;
+			qcom,vset-millivolts = <3000>;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-msm8974.dtsi
index a39207625354..75cae87219d6 100644
--- a/arch/arm/boot/dts/qcom-msm8974.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
@@ -613,6 +613,20 @@
 			status = "disabled";
 		};
 
+		sdhci@f9864900 {
+			compatible = "qcom,sdhci-msm-v4";
+			reg = <0xf9864900 0x11c>, <0xf9864000 0x800>;
+			reg-names = "hc_mem", "core_mem";
+			interrupts = <GIC_SPI 127 IRQ_TYPE_NONE>,
+				     <GIC_SPI 224 IRQ_TYPE_NONE>;
+			interrupt-names = "hc_irq", "pwr_irq";
+			clocks = <&gcc GCC_SDCC3_APPS_CLK>,
+				 <&gcc GCC_SDCC3_AHB_CLK>,
+				 <&xo_board>;
+			clock-names = "core", "iface", "xo";
+			status = "disabled";
+		};
+
 		sdhci@f98a4900 {
 			compatible = "qcom,sdhci-msm-v4";
 			reg = <0xf98a4900 0x11c>, <0xf98a4000 0x800>;
diff --git a/arch/arm/boot/dts/qcom-msm8974pro.dtsi b/arch/arm/boot/dts/qcom-msm8974pro.dtsi
new file mode 100644
index 000000000000..6740a4cb7da8
--- /dev/null
+++ b/arch/arm/boot/dts/qcom-msm8974pro.dtsi
@@ -0,0 +1,18 @@
+#include "qcom-msm8974.dtsi"
+
+/ {
+	soc {
+		sdhci@f9824900 {
+			clocks = <&gcc GCC_SDCC1_APPS_CLK>,
+				 <&gcc GCC_SDCC1_AHB_CLK>,
+				 <&xo_board>,
+				 <&gcc GCC_SDCC1_CDCCAL_FF_CLK>,
+				 <&gcc GCC_SDCC1_CDCCAL_SLEEP_CLK>;
+			clock-names = "core", "iface", "xo", "cal", "sleep";
+		};
+
+		clock-controller@fc400000 {
+				compatible = "qcom,gcc-msm8974pro";
+		};
+	};
+};
