Add support for WD MyCloud EX2 Ultra (+ versatile UART-based restart/poweroff drivers)

new file mode 100644
index 000000000000..86d036271b51
@@ -0,0 +1,38 @@
+* UART-based PM MCU power off driver
+
+Some devices have a microcontroller controlling the main power
+supply. This microcontroller is connected to UART of the SoC.
+Sending a sequence of characters tells the MCU to turn
+the power off.
+
+The length of the sequence, baud rate and the timeout to process
+the command may vary from device to device.
+
+This driver could be used for WD My Cloud (Marvell SoCs), QNAP
+(Kirkwood and Orion5x SoCs) and Synology NAS devices.
+
+Required properties:
+- compatible: Should be "uart-poweroff"
+- reg: Address and length of the register set for UART
+- clocks: The tclk clock
+- cmd: Array of bytes, the command to send to the MCU
+- baud: Baud rate [75..460800]
+
+Optional properties:
+- byte-delay: A delay after each byte of a command, could be useful
+              for sloppy MCUs [ms], default value is 5
+- timeout: A timeout to wait for the MCU to process the command [ms],
+           default value is 1000
+- override: Boolean flag that indicates if the driver should
+            prioritize itself over any existing power off driver,
+            default behaviour is not to interfere
+
+Example:
+	poweroff@12100 {
+		compatible = "uart-poweroff";
+		reg = <0x12100 0x100>;
+		clocks = <&coreclk 0>;
+		baud = <19200>;
+		cmd = [fa 03 03 01 00 00 fb];
+		status = "okay";
+	};

new file mode 100644
index 000000000000..bf831d9bdff8
@@ -0,0 +1,39 @@
+* UART-based PM MCU restart driver
+
+Some devices have a microcontroller controlling the main power
+supply. This microcontroller is connected to UART of the SoC.
+Sending a sequence of characters tells the MCU to reset the SoC
+and/or MCU itself.
+
+The length of the sequence, baud rate and the timeout to process
+the command may vary from device to device.
+
+This driver could be used for WD My Cloud (Marvell SoCs), QNAP
+(Kirkwood and Orion5x SoCs) and Synology NAS devices.
+
+Required properties:
+- compatible: Should be "uart-restart"
+- reg: Address and length of the register set for UART
+- clocks: The tclk clock
+- cmd: Array of bytes, the command to send to the MCU
+- baud: Baud rate [75..460800]
+
+Optional properties:
+- byte-delay: A delay after each byte of a command, could be useful
+              for sloppy MCUs [ms], default value is 5
+- timeout: A timeout to wait for the MCU to process the command [ms],
+           default value is 1000
+- override: Boolean flag that indicates if the driver should
+            prioritize itself over any existing restart driver,
+            default behaviour is not to interfere
+
+Example:
+	restart@12100 {
+		compatible = "uart-restart";
+		reg = <0x12100 0x100>;
+		clocks = <&coreclk 0>;
+		baud = <19200>;
+		cmd = [fa 03 03 02 00 00 fb];
+		override;
+		status = "okay";
+	};

index a564237278ff..02fdf45e3988 100644
@@ -216,6 +216,13 @@ config POWER_RESET_RMOBILE
 	help
 	  Reboot support for Renesas R-Mobile and SH-Mobile SoCs.
 
+config POWER_RESET_UART_POWEROFF
+	tristate "UART-based PM MCU power off driver"
+	depends on OF_GPIO
+	help
+	  Power off support for boards with UART-based PM MCU
+	  such as WD My Cloud NAS, QNAP Turbo NAS, Synology devices.
+
 config POWER_RESET_ZX
 	tristate "ZTE SoCs reset driver"
 	depends on ARCH_ZX || COMPILE_TEST

index 85da3198e4e0..efe8f25f463d 100644
@@ -25,6 +25,7 @@ obj-$(CONFIG_POWER_RESET_KEYSTONE) += keystone-reset.o
 obj-$(CONFIG_POWER_RESET_SYSCON) += syscon-reboot.o
 obj-$(CONFIG_POWER_RESET_SYSCON_POWEROFF) += syscon-poweroff.o
 obj-$(CONFIG_POWER_RESET_RMOBILE) += rmobile-reset.o
+obj-$(CONFIG_POWER_RESET_UART_POWEROFF) += uart-poweroff.o
 obj-$(CONFIG_POWER_RESET_ZX) += zx-reboot.o
 obj-$(CONFIG_REBOOT_MODE) += reboot-mode.o
 obj-$(CONFIG_SYSCON_REBOOT_MODE) += syscon-reboot-mode.o

index 02fdf45e3988..4b187af1fba6 100644
@@ -223,6 +223,13 @@ config POWER_RESET_UART_POWEROFF
 	  Power off support for boards with UART-based PM MCU
 	  such as WD My Cloud NAS, QNAP Turbo NAS, Synology devices.
 
+config POWER_RESET_UART
+	tristate "UART-based PM MCU restart driver"
+	depends on OF_GPIO
+	help
+	  Reboot support for boards with UART-based PM MCU
+	  such as WD My Cloud NAS, QNAP Turbo NAS, Synology devices.
+
 config POWER_RESET_ZX
 	tristate "ZTE SoCs reset driver"
 	depends on ARCH_ZX || COMPILE_TEST

index efe8f25f463d..fa8a936d7a1a 100644
@@ -26,6 +26,7 @@ obj-$(CONFIG_POWER_RESET_SYSCON) += syscon-reboot.o
 obj-$(CONFIG_POWER_RESET_SYSCON_POWEROFF) += syscon-poweroff.o
 obj-$(CONFIG_POWER_RESET_RMOBILE) += rmobile-reset.o
 obj-$(CONFIG_POWER_RESET_UART_POWEROFF) += uart-poweroff.o
+obj-$(CONFIG_POWER_RESET_UART) += uart-restart.o
 obj-$(CONFIG_POWER_RESET_ZX) += zx-reboot.o
 obj-$(CONFIG_REBOOT_MODE) += reboot-mode.o
 obj-$(CONFIG_SYSCON_REBOOT_MODE) += syscon-reboot-mode.o

new file mode 100644
index 000000000000..018e66adbb93
@@ -0,0 +1,313 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Device Tree file for Western Digital My Cloud EX2 Ultra
+ * (BVBZ/Ranger Peak)
+ *
+ * Copyright (C) 2019 Evgeny Kolesnikov <[email protected]>
+ *
+ * Based on the code from:
+ *
+ * Copyright (C) 2016 Martin Mueller <[email protected]>
+ * Copyright (C) 2013 Gregory CLEMENT <[email protected]>
+ * Copyright (C) 2013 Thomas Petazzoni <[email protected]>
+ */
+
+/dts-v1/;
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include "armada-385.dtsi"
+
+/ {
+	model = "WD My Cloud EX2 Ultra (BVBZ/Ranger Peak)";
+	compatible = "wd,mcex2u", "marvell,armada385", "marvell,armada380";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs = "console=ttyS0,115200";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x40000000>; /* 1024 MB */
+	};
+
+	soc {
+		ranges = <MBUS_ID(0xf0, 0x01) 0 0xf1000000 0x100000
+			  MBUS_ID(0x01, 0x1d) 0 0xfff00000 0x100000
+			  MBUS_ID(0x09, 0x19) 0 0xf1100000 0x10000
+			  MBUS_ID(0x09, 0x15) 0 0xf1110000 0x10000
+			  MBUS_ID(0x0c, 0x04) 0 0xf1200000 0x100000>;
+
+		internal-regs {
+			timer@c200 {
+				status = "disabled";
+			};
+
+			i2c0: i2c@11000 {
+				status = "okay";
+				clock-frequency = <100000>;
+			};
+
+			i2c1: i2c@11100 {
+				status = "okay";
+				clock-frequency = <100000>;
+			};
+
+			serial@12000 {
+				status = "okay";
+			};
+
+			/* Connected to Welltrend 6703F-OG240WT MCU
+			 * which controls power, fan and other things
+			 */
+			serial@12100 {
+				status = "okay";
+			};
+
+			poweroff@12100 {
+				compatible = "uart-poweroff";
+				reg = <0x12100 0x100>;
+				clocks = <&coreclk 0>;
+				baud = <19200>;
+				cmd = [fa 03 03 01 00 00 fb];
+				status = "okay";
+			};
+
+			restart@12100 {
+				compatible = "uart-restart";
+				reg = <0x12100 0x100>;
+				clocks = <&coreclk 0>;
+				baud = <19200>;
+				cmd = [fa 03 03 02 00 00 fb];
+				override;
+				status = "okay";
+			};
+
+			pinctrl@18000 {
+				uart1_pins: uart-pins-1 {
+					marvell,pins = "mpp19";
+					marvell,function = "ua1";
+				};
+
+				xhci0_vbus_pins: xhci0-vbus-pins {
+					marvell,pins = "mpp26";
+					marvell,function = "gpio";
+				};
+
+				xhci1_vbus_pins: xhci1-vbus-pins {
+					marvell,pins = "mpp27";
+					marvell,function = "gpio";
+				};
+
+				sata0_pins: sata-pins-0 {
+					marvell,pins = "mpp55";
+					marvell,function = "sata0";
+				};
+
+				sata1_pins: sata-pins-1 {
+					marvell,pins = "mpp56";
+					marvell,function = "sata1";
+				};
+
+				sata_leds: sata-leds {
+					marvell,pins = "mpp43", "mpp52",
+						       "mpp53", "mpp54";
+					marvell,function = "gpio";
+				};
+
+				btn_pins: btn-pins {
+					marvell,pins = "mpp50";
+					marvell,function = "gpio";
+				};
+			};
+
+			ethernet@34000 {
+				phy = <&phy0>;
+				phy-mode = "sgmii";
+				buffer-manager = <&bm>;
+				bm,pool-long = <0>;
+				bm,pool-short = <1>;
+				status = "okay";
+			};
+
+			usb@58000 {
+				status = "okay";
+			};
+
+			mdio@72004 {
+				phy0: ethernet-phy@0 {
+					/* Init ETH LEDs */
+					marvell,reg-init = <3 16 0 0x101e>;
+					reg = <0>;
+				};
+			};
+
+			crypto@9d000 {
+				status = "okay";
+			};
+
+			rtc@a3800 {
+				status = "okay";
+			};
+
+			sata@a8000 {
+				status = "okay";
+			};
+
+			bm@c8000 {
+				status = "okay";
+			};
+
+			nand-controller@d0000 {
+				status = "okay";
+
+				nand: nand@0 {
+					reg = <0>;
+					label = "pxa3xx_nand-0";
+					marvell,nand-keep-config;
+					nand-rb = <0>;
+					nand-on-flash-bbt;
+					nand-ecc-strength = <4>;
+					nand-ecc-step-size = <512>;
+
+					partitions {
+						compatible = "fixed-partitions";
+						#address-cells = <1>;
+						#size-cells = <1>;
+
+						partition@0000000 {
+							label = "U-Boot";
+							reg = <0x00000000 0x00500000>;
+							read-only;
+						};
+						partition@0500000 {
+							label = "kernel";
+							reg = <0x00500000 0x00500000>;
+						};
+						partition@0a00000 {
+							label = "uRamdisk";
+							reg = <0x00a00000 0x00500000>;
+							read-only;
+						};
+						partition@0f00000 {
+							label = "ubi";
+							reg = <0x00f00000 0x0b900000>;
+						};
+						partition@c800000 {
+							label = "Recovery";
+							reg = <0x0c800000 0x00f00000>;
+							read-only;
+						};
+						partition@d700000 {
+							label = "config";
+							reg = <0x0d700000 0x01400000>;
+						};
+						partition@eb00000 {
+							label = "reserve1";
+							reg = <0x0eb00000 0x00a00000>;
+							read-only;
+						};
+						partition@f500000 {
+							label = "reserve2";
+							reg = <0x0f500000 0x00a00000>;
+							read-only;
+						};
+					};
+				};
+			};
+
+			sdhci@d8000 {
+				status = "disabled";
+			};
+
+			usb3@f0000 {
+				usb-phy = <&usb3_0_phy>;
+				status = "okay";
+			};
+
+			usb3@f8000 {
+				usb-phy = <&usb3_1_phy>;
+				status = "okay";
+			};
+		};
+
+		bm-bppi {
+			status = "okay";
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&sata_leds>;
+
+		sata1-red-led {
+			label = "wdmcex2u:red:hdd1";
+			gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+		};
+		sata2-red-led {
+			label = "wdmcex2u:red:hdd2";
+			gpios = <&gpio1 20 GPIO_ACTIVE_HIGH>;
+		};
+		sata1-blue-led {
+			label = "wdmcex2u:blue:hdd1";
+			gpios = <&gpio1 21 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "default-on";
+		};
+		sata2-blue-led {
+			label = "wdmcex2u:blue:hdd2";
+			gpios = <&gpio1 22 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "default-on";
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+		pinctrl-0 = <&btn_pins>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio1 18 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			wakeup-source;
+		};
+	};
+
+	usb3_0_phy: usb3_0_phy {
+		compatible = "usb-nop-xceiv";
+		vcc-supply = <&reg_usb3_0_vbus>;
+	};
+
+	usb3_1_phy: usb3_1_phy {
+		compatible = "usb-nop-xceiv";
+		vcc-supply = <&reg_usb3_1_vbus>;
+	};
+
+	reg_usb3_0_vbus: usb3-vbus0 {
+		compatible = "regulator-fixed";
+		regulator-name = "usb3-vbus0";
+		pinctrl-names = "default";
+		pinctrl-0 = <&xhci0_vbus_pins>;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		enable-active-high;
+		regulator-always-on;
+		gpio = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+	};
+
+	reg_usb3_1_vbus: usb3-vbus1 {
+		compatible = "regulator-fixed";
+		regulator-name = "usb3-vbus1";
+		pinctrl-names = "default";
+		pinctrl-0 = <&xhci1_vbus_pins>;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		enable-active-high;
+		regulator-always-on;
+		gpio = <&gpio0 27 GPIO_ACTIVE_HIGH>;
+	};
+};