sunxi: Add support for NanoPi M1

NanoPi M1 is a board based on Allwinner H3 CPU.

This commit adds the support for this platform with:
   - an include device tree which enables UART, LEDs, GPIO key switch,
   1 USB host ports and the SD-card as a dtsi file.
   - a device tree specific to this board that enables the
   2 additional USB ports
   - a defconfig file for minimal support
   - a section in MAINTAINERS (add myself)

Synchronized with the kernel device tree, from commits:
sun8i-nanopi.dtsi: 85d2913614d9ab899d23b7ab7d22d23cf45bd1de
sun8i-h3-nanopi-m1.dts: 10efbf5f16336b7540ad6a16aa1cb0b26bab033b

Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>

3 files changed, 202 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index e2c2584474..f2e59218a6 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -307,6 +307,7 @@ dtb-$(CONFIG_MACH_SUN8I_H3) += \
 	sun8i-h3-orangepi-pc-plus.dtb \
 	sun8i-h3-orangepi-plus.dtb \
 	sun8i-h3-orangepi-plus2e.dtb \
+	sun8i-h3-nanopi-m1.dtb \
 	sun8i-h3-nanopi-neo.dtb \
 	sun8i-h3-nanopi-neo-air.dtb
 dtb-$(CONFIG_MACH_SUN8I_R40) += \
diff --git a/arch/arm/dts/sun8i-h3-nanopi-m1.dts b/arch/arm/dts/sun8i-h3-nanopi-m1.dts
new file mode 100644
index 0000000000..ec63d104b4
--- /dev/null
+++ b/arch/arm/dts/sun8i-h3-nanopi-m1.dts
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2016 Milo Kim <woogyom.kim@gmail.com>
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#include "sun8i-h3-nanopi.dtsi"
+
+/ {
+	model = "FriendlyArm NanoPi M1";
+	compatible = "friendlyarm,nanopi-m1", "allwinner,sun8i-h3";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&ehci2 {
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
+
+&ohci2 {
+	status = "okay";
+};
diff --git a/arch/arm/dts/sun8i-h3-nanopi.dtsi b/arch/arm/dts/sun8i-h3-nanopi.dtsi
new file mode 100644
index 0000000000..c6decee41a
--- /dev/null
+++ b/arch/arm/dts/sun8i-h3-nanopi.dtsi
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2016 James Pettigrew <james@innovum.com.au>
+ * Copyright (C) 2016 Milo Kim <woogyom.kim@gmail.com>
+ *
+ * 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.
+ *
+ * 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 "sun8i-h3.dtsi"
+#include "sunxi-common-regulators.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&leds_npi>, <&leds_r_npi>;
+
+		status {
+			label = "nanopi:blue:status";
+			gpios = <&pio 0 10 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+		};
+
+		pwr {
+			label = "nanopi:green:pwr";
+			gpios = <&r_pio 0 10 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+	};
+
+	r_gpio_keys {
+		compatible = "gpio-keys";
+		input-name = "k1";
+		pinctrl-names = "default";
+		pinctrl-0 = <&sw_r_npi>;
+
+		k1@0 {
+			label = "k1";
+			linux,code = <KEY_POWER>;
+			gpios = <&r_pio 0 3 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&ehci3 {
+	status = "okay";
+};
+
+&mmc0 {
+	bus-width = <4>;
+	cd-gpios = <&pio 5 6 GPIO_ACTIVE_HIGH>;
+	cd-inverted;
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin>;
+	status = "okay";
+	vmmc-supply = <&reg_vcc3v3>;
+};
+
+&ohci3 {
+	status = "okay";
+};
+
+&pio {
+	leds_npi: led_pins@0 {
+		pins = "PA10";
+		function = "gpio_out";
+	};
+};
+
+&r_pio {
+	leds_r_npi: led_pins@0 {
+		pins = "PL10";
+		function = "gpio_out";
+	};
+
+	sw_r_npi: key_pins@0 {
+		pins = "PL3";
+		function = "gpio_in";
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins_a>;
+	status = "okay";
+};
+
+&usbphy {
+	status = "okay";
+};