MIPS: dts: Add Vocore2 board

The VoCore2 board is a low cost MT7628A based board with 128MB RAM, 16MB
flash and multiple external peripherals.

This initial DTS provides enough support to get to userland and use the USB
port.
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Cc: robh+dt@kernel.org
Cc: mark.rutland@arm.com
Cc: john@phrozen.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17134/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MAINTAINERS

@@ -14126,6 +14126,12 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/vmxnet3/
 
+VOCORE VOCORE2 BOARD
+M:	Harvey Hunt <harveyhuntnexus@gmail.com>
+L:	linux-mips@linux-mips.org
+S:	Maintained
+F:	arch/mips/boot/dts/ralink/vocore2.dts
+
 VOLTAGE AND CURRENT REGULATOR FRAMEWORK
 M:	Liam Girdwood <lgirdwood@gmail.com>
 M:	Mark Brown <broonie@kernel.org>

arch/mips/boot/dts/ralink/Makefile

@@ -2,6 +2,7 @@ dtb-$(CONFIG_DTB_RT2880_EVAL)	+= rt2880_eval.dtb
 dtb-$(CONFIG_DTB_RT305X_EVAL)	+= rt3052_eval.dtb
 dtb-$(CONFIG_DTB_RT3883_EVAL)	+= rt3883_eval.dtb
 dtb-$(CONFIG_DTB_MT7620A_EVAL)	+= mt7620a_eval.dtb
+dtb-$(CONFIG_DTB_VOCORE2)	+= vocore2.dtb
 
 obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 

arch/mips/boot/dts/ralink/vocore2.dts

+/dts-v1/;
+
+#include "mt7628a.dtsi"
+
+/ {
+	compatible = "vocore,vocore2", "ralink,mt7628a-soc";
+	model = "VoCore2";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x8000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS2,115200";
+		stdout-path = &uart2;
+	};
+};

arch/mips/ralink/Kconfig

@@ -82,6 +82,11 @@ choice
 		depends on SOC_MT7620
 		select BUILTIN_DTB
 
+	config DTB_VOCORE2
+		bool "VoCore2"
+		depends on SOC_MT7620
+		select BUILTIN_DTB
+
 endchoice
 
 endif