ARM: Kirkwood: add DT description for nas2big

This patch adds the DT description for the LaCie "2Big NAS" (nas2big).
This NAS is an hardware upgrade of the 2Big Network v2.

Chipset and device list:

- CPU Marvell 88F6282 1600Mhz
- SDRAM memory, 256MB DDR3 (2x128MB x8) 533Mhz
- 1 Ethernet Gigabit port (PHY Marvell 88E1518)
- Flash memory, NAND 256MB TSOP48
- I2C EEPROM, 512 bytes (AT24 type)
- PCIe SATA controller JMicron JMB360 (eSATA)
- I2C fan controller GMT G762 (with a separate alarm GPIO)
- 1 USB2 host port
- 1 push button
- 1 power switch
- 2 SATA LEDs (bi-color, blue and red)
- 1 power LED (bi-color, blue and red)
- CPLD for LEDs and start-up management (Altera Max EMP3064)
Signed-off-by: Simon Guinot <simon.guinot@sequanux.org>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

Documentation/devicetree/bindings/arm/marvell,kirkwood.txt

@@ -42,6 +42,7 @@ board. Currently known boards are:
 "lacie,cloudbox"
 "lacie,inetspace_v2"
 "lacie,laplug"
+"lacie,nas2big"
 "lacie,netspace_lite_v2"
 "lacie,netspace_max_v2"
 "lacie,netspace_mini_v2"

arch/arm/boot/dts/Makefile

@@ -165,6 +165,7 @@ dtb-$(CONFIG_MACH_KIRKWOOD) += \
 	kirkwood-lsxhl.dtb \
 	kirkwood-mplcec4.dtb \
 	kirkwood-mv88f6281gtw-ge.dtb \
+	kirkwood-nas2big.dtb \
 	kirkwood-net2big.dtb \
 	kirkwood-net5big.dtb \
 	kirkwood-netgear_readynas_duo_v2.dtb \

arch/arm/boot/dts/kirkwood-nas2big.dts

+/*
+ * Device Tree file for LaCie 2Big NAS
+ *
+ * Copyright (C) 2015 Seagate
+ *
+ * Author: Simon Guinot <simon.guinot@sequanux.org>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+*/
+
+/dts-v1/;
+
+#include "kirkwood-netxbig.dtsi"
+
+/ {
+	model = "LaCie 2Big NAS";
+	compatible = "lacie,nas2big", "lacie,netxbig", "marvell,kirkwood-88f6282", "marvell,kirkwood";
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x10000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+		stdout-path = &uart0;
+	};
+
+	mbus {
+		pcie-controller {
+			status = "okay";
+
+			pcie@1,0 {
+				status = "okay";
+			};
+		};
+	};
+
+	ocp@f1000000 {
+		rtc@10300 {
+			/* The on-chip RTC is not powered (no supercap). */
+			status = "disabled";
+		};
+		spi@10600 {
+			/*
+			 * A NAND flash is used instead of an SPI flash for
+			 * the other netxbig-compatible boards.
+			 */
+			status = "disabled";
+		};
+	};
+
+	fan {
+		/*
+		 * An I2C fan controller (GMT G762) is used but alarm is
+		 * wired to a separate GPIO.
+		 */
+		compatible = "gpio-fan";
+		alarm-gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;
+	};
+
+	regulators: regulators {
+		status = "okay";
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		pinctrl-names = "default";
+
+		regulator@2 {
+			compatible = "regulator-fixed";
+			reg = <2>;
+			regulator-name = "hdd1power";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+			enable-active-high;
+			regulator-always-on;
+			regulator-boot-on;
+			gpio = <&gpio0 17 GPIO_ACTIVE_HIGH>;
+		};
+		clocks {
+			g762_clk: g762-oscillator {
+				compatible = "fixed-clock";
+				#clock-cells = <0>;
+				clock-frequency = <32768>;
+			};
+		};
+	};
+};
+
+&mdio {
+	status = "okay";
+
+	ethphy0: ethernet-phy@0 {
+		reg = <0>;
+	};
+};
+
+&i2c0 {
+	status = "okay";
+
+	/*
+	 * An external I2C RTC (Dallas DS1337S+) is used. This allows
+	 * to power-up the board on an RTC alarm. The external RTC can
+	 * be kept powered, even when the SoC is off.
+	 */
+	rtc@68 {
+		compatible = "dallas,ds1307";
+		reg = <0x68>;
+		interrupts = <43>;
+	};
+	g762@3e {
+		compatible = "gmt,g762";
+		reg = <0x3e>;
+		clocks = <&g762_clk>;
+	};
+};
+
+&nand {
+	chip-delay = <50>;
+	status = "okay";
+
+	partition@0 {
+		label = "U-Boot";
+		reg = <0x0 0x100000>;
+	};
+
+	partition@100000 {
+		label = "uImage";
+		reg = <0x100000 0x1000000>;
+	};
+
+	partition@1100000 {
+		label = "root";
+		reg = <0x1100000 0x8000000>;
+	};
+
+	partition@9100000 {
+		label = "unused";
+		reg = <0x9100000 0x6f00000>;
+	};
+};