ARM: dts: sun7i: Add dts file for pcDuino 3 Nano board

Add support for the LinkSprite pcDuino 3 Nano board. This is a low-cost
Allwinner A20 board with Arduino-style GPIO headers; it features 1G RAM,
4G NAND flash, 1 micro-SD, 2 USB sockets, 1 micro USB socket for OTG and
another for power in, HDMI, SATA, 5V power for SATA devices, gigabit
Ethernet, an IR receiver, 3.5mm audio out and a MIPI camera connector.

For more details, see: http://linux-sunxi.org/LinkSprite_pcDuino3_Nano

Changes in v3:
- rename LEDs to pcduino3-nano:green:usr[12]
- remove optional features on Arduino headers (i2c2, spi0, uart2)
Signed-off-by: Adam Sampson <ats@offog.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/Makefile

@@ -559,7 +559,8 @@ dtb-$(CONFIG_MACH_SUN7I) += \
 	sun7i-a20-olinuxino-lime.dtb \
 	sun7i-a20-olinuxino-lime2.dtb \
 	sun7i-a20-olinuxino-micro.dtb \
-	sun7i-a20-pcduino3.dtb
+	sun7i-a20-pcduino3.dtb \
+	sun7i-a20-pcduino3-nano.dtb
 dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-a23-ippo-q8h-v5.dtb \
 	sun8i-a23-ippo-q8h-v1.2.dtb

arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts

+/*
+ * Copyright 2015 Adam Sampson <ats@offog.org>
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
+ *
+ *     This file is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public
+ *     License along with this file; if not, write to the Free
+ *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ *     MA 02110-1301 USA
+ *
+ * Or, alternatively,
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/dts-v1/;
+#include "sun7i-a20.dtsi"
+#include "sunxi-common-regulators.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	model = "LinkSprite pcDuino3 Nano";
+	compatible = "linksprite,pcduino3-nano", "allwinner,sun7i-a20";
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&led_pins_pcduino3_nano>;
+
+		/* Marked "LED3" on the PCB. */
+		usr1 {
+			label = "pcduino3-nano:green:usr1";
+			gpios = <&pio 7 16 GPIO_ACTIVE_LOW>; /* PH16 */
+		};
+
+		/* Marked "LED4" on the PCB. */
+		usr2 {
+			label = "pcduino3-nano:green:usr2";
+			gpios = <&pio 7 15 GPIO_ACTIVE_LOW>; /* PH15 */
+		};
+	};
+};
+
+&ahci {
+	target-supply = <&reg_ahci_5v>;
+	status = "okay";
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&gmac {
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac_pins_rgmii_a>;
+	phy = <&phy1>;
+	phy-mode = "rgmii";
+	status = "okay";
+
+	phy1: ethernet-phy@1 {
+		reg = <1>;
+	};
+};
+
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins_a>;
+	status = "okay";
+
+	axp209: pmic@34 {
+		compatible = "x-powers,axp209";
+		reg = <0x34>;
+		interrupt-parent = <&nmi_intc>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+	};
+};
+
+&ir0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&ir0_pins_a>;
+	status = "okay";
+};
+
+&mmc0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_reference_design>;
+	vmmc-supply = <&reg_vcc3v3>;
+	bus-width = <4>;
+	cd-gpios = <&pio 7 1 GPIO_ACTIVE_HIGH>; /* PH1 */
+	cd-inverted;
+	status = "okay";
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
+
+&pio {
+	ahci_pwr_pin_pcduino3_nano: ahci_pwr_pin@0 {
+		allwinner,pins = "PH2";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+
+	led_pins_pcduino3_nano: led_pins@0 {
+		allwinner,pins = "PH16", "PH15";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+
+	usb1_vbus_pin_pcduino3_nano: usb1_vbus_pin@0 {
+		allwinner,pins = "PH11";
+		allwinner,function = "gpio_out";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+};
+
+&reg_ahci_5v {
+	pinctrl-0 = <&ahci_pwr_pin_pcduino3_nano>;
+	gpio = <&pio 7 2 GPIO_ACTIVE_HIGH>; /* PH2 */
+	status = "okay";
+};
+
+&reg_usb1_vbus {
+	pinctrl-0 = <&usb1_vbus_pin_pcduino3_nano>;
+	gpio = <&pio 7 11 GPIO_ACTIVE_HIGH>; /* PH11 */
+	status = "okay";
+};
+
+&reg_usb2_vbus {
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins_a>;
+	status = "okay";
+};
+
+&usbphy {
+	usb1_vbus-supply = <&reg_usb1_vbus>;
+	usb2_vbus-supply = <&reg_usb2_vbus>;
+	status = "okay";
+};