arm64: dts: meson-axg: add initial A113D SoC DT support

Try to add basic DT support for the Amlogic's Meson-AXG A113D SoC,
which describe components as follows: Reserve Memory, CPU, GIC, IRQ,
Timer, UART. It's capable of booting up into the serial console.
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/Makefile

+dtb-$(CONFIG_ARCH_MESON) += meson-axg-s400.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nanopi-k2.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nexbox-a95x.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-odroidc2.dtb

arch/arm64/boot/dts/amlogic/meson-axg-s400.dts

+/*
+ * Copyright (c) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+ */
+
+/dts-v1/;
+
+#include "meson-axg.dtsi"
+
+/ {
+	compatible = "amlogic,s400", "amlogic,a113d", "amlogic,meson-axg";
+	model = "Amlogic Meson AXG S400 Development Board";
+
+	aliases {
+		serial0 = &uart_AO;
+	};
+};
+
+&uart_AO {
+	status = "okay";
+};

arch/arm64/boot/dts/amlogic/meson-axg.dtsi

+/*
+ * Copyright (c) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	compatible = "amlogic,meson-axg";
+
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/* 16 MiB reserved for Hardware ROM Firmware */
+		hwrom_reserved: hwrom@0 {
+			reg = <0x0 0x0 0x0 0x1000000>;
+			no-map;
+		};
+
+		/* Alternate 3 MiB reserved for ARM Trusted Firmware (BL31) */
+		secmon_reserved: secmon@05000000 {
+			reg = <0x0 0x05000000 0x0 0x300000>;
+			no-map;
+		};
+	};
+
+	cpus {
+		#address-cells = <0x2>;
+		#size-cells = <0x0>;
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x0>;
+			enable-method = "psci";
+			next-level-cache = <&l2>;
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x1>;
+			enable-method = "psci";
+			next-level-cache = <&l2>;
+		};
+
+		cpu2: cpu@2 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x2>;
+			enable-method = "psci";
+			next-level-cache = <&l2>;
+		};
+
+		cpu3: cpu@3 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x3>;
+			enable-method = "psci";
+			next-level-cache = <&l2>;
+		};
+
+		l2: l2-cache0 {
+			compatible = "cache";
+		};
+	};
+
+	arm-pmu {
+		compatible = "arm,cortex-a53-pmu";
+		interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
+	};
+
+	psci {
+		compatible = "arm,psci-1.0";
+		method = "smc";
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <GIC_PPI 13
+			(GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 14
+			(GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 11
+			(GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 10
+			(GIC_CPU_MASK_RAW(0xff) | IRQ_TYPE_LEVEL_LOW)>;
+	};
+
+	xtal: xtal-clk {
+		compatible = "fixed-clock";
+		clock-frequency = <24000000>;
+		clock-output-names = "xtal";
+		#clock-cells = <0>;
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		cbus: cbus@ffd00000 {
+			compatible = "simple-bus";
+			reg = <0x0 0xffd00000 0x0 0x25000>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges = <0x0 0x0 0x0 0xffd00000 0x0 0x25000>;
+
+			uart_A: serial@24000 {
+				compatible = "amlogic,meson-gx-uart", "amlogic,meson-uart";
+				reg = <0x0 0x24000 0x0 0x14>;
+				interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>;
+				status = "disabled";
+			};
+
+			uart_B: serial@23000 {
+				compatible = "amlogic,meson-gx-uart", "amlogic,meson-uart";
+				reg = <0x0 0x23000 0x0 0x14>;
+				interrupts = <GIC_SPI 75 IRQ_TYPE_EDGE_RISING>;
+				status = "disabled";
+			};
+		};
+
+		gic: interrupt-controller@ffc01000 {
+			compatible = "arm,gic-400";
+			reg = <0x0 0xffc01000 0 0x1000>,
+			      <0x0 0xffc02000 0 0x2000>,
+			      <0x0 0xffc04000 0 0x2000>,
+			      <0x0 0xffc06000 0 0x2000>;
+			interrupt-controller;
+			interrupts = <GIC_PPI 9
+				(GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_HIGH)>;
+			#interrupt-cells = <3>;
+			#address-cells = <0>;
+		};
+
+		mailbox: mailbox@ff63dc00 {
+			compatible = "amlogic,meson-gx-mhu", "amlogic,meson-gxbb-mhu";
+			reg = <0 0xff63dc00 0 0x400>;
+			interrupts = <GIC_SPI 208 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 209 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 210 IRQ_TYPE_EDGE_RISING>;
+			#mbox-cells = <1>;
+		};
+
+		sram: sram@fffc0000 {
+			compatible = "amlogic,meson-axg-sram", "mmio-sram";
+			reg = <0x0 0xfffc0000 0x0 0x20000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x0 0xfffc0000 0x20000>;
+
+			cpu_scp_lpri: scp-shmem@0 {
+				compatible = "amlogic,meson-axg-scp-shmem";
+				reg = <0x13000 0x400>;
+			};
+
+			cpu_scp_hpri: scp-shmem@200 {
+				compatible = "amlogic,meson-axg-scp-shmem";
+				reg = <0x13400 0x400>;
+			};
+		};
+
+		aobus: aobus@ff800000 {
+			compatible = "simple-bus";
+			reg = <0x0 0xff800000 0x0 0x100000>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges = <0x0 0x0 0x0 0xff800000 0x0 0x100000>;
+
+			uart_AO: serial@3000 {
+				compatible = "amlogic,meson-gx-uart", "amlogic,meson-ao-uart";
+				reg = <0x0 0x3000 0x0 0x18>;
+				interrupts = <GIC_SPI 193 IRQ_TYPE_EDGE_RISING>;
+				clocks = <&xtal>, <&xtal>, <&xtal>;
+				clock-names = "xtal", "pclk", "baud";
+				status = "disabled";
+			};
+
+			uart_AO_B: serial@4000 {
+				compatible = "amlogic,meson-gx-uart", "amlogic,meson-ao-uart";
+				reg = <0x0 0x4000 0x0 0x18>;
+				interrupts = <GIC_SPI 197 IRQ_TYPE_EDGE_RISING>;
+				clocks = <&xtal>, <&xtal>, <&xtal>;
+				clock-names = "xtal", "pclk", "baud";
+				status = "disabled";
+			};
+		};
+	};
+};