arm64: dts: realtek: Add RTD1395 and BPi-M4

Add Device Trees for Realtek RTD1395 SoC and Banana Pi BPi-M4 SBC.

For now reuse RTD1295 reset constants.

Signed-off-by: Andreas Färber <afaerber@suse.de>

arch/arm64/boot/dts/realtek/Makefile

@@ -7,3 +7,5 @@ dtb-$(CONFIG_ARCH_REALTEK) += rtd1295-probox2-ava.dtb
 dtb-$(CONFIG_ARCH_REALTEK) += rtd1295-zidoo-x9s.dtb
 
 dtb-$(CONFIG_ARCH_REALTEK) += rtd1296-ds418.dtb
+
+dtb-$(CONFIG_ARCH_REALTEK) += rtd1395-bpi-m4.dtb

arch/arm64/boot/dts/realtek/rtd1395-bpi-m4.dts

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Copyright (c) 2019 Andreas Färber
+ */
+
+/dts-v1/;
+
+#include "rtd1395.dtsi"
+
+/ {
+	compatible = "bananapi,bpi-m4", "realtek,rtd1395";
+	model = "Banana Pi BPI-M4";
+
+	memory@2f000 {
+		device_type = "memory";
+		reg = <0x2f000 0x3ffd1000>; /* boot ROM to 1 GiB or 2 GiB */
+	};
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&uart0 {
+	status = "okay";
+};

arch/arm64/boot/dts/realtek/rtd1395.dtsi

@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Realtek RTD1395 SoC
+ *
+ * Copyright (c) 2019 Andreas Färber
+ */
+
+#include "rtd139x.dtsi"
+
+/ {
+	compatible = "realtek,rtd1395";
+
+	cpus {
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x0 0x0>;
+			next-level-cache = <&l2>;
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x0 0x1>;
+			next-level-cache = <&l2>;
+		};
+
+		cpu2: cpu@2 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x0 0x2>;
+			next-level-cache = <&l2>;
+		};
+
+		cpu3: cpu@3 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0x0 0x3>;
+			next-level-cache = <&l2>;
+		};
+
+		l2: l2-cache {
+			compatible = "cache";
+		};
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <GIC_PPI 13
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 14
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 11
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+			     <GIC_PPI 10
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+	};
+};
+
+&arm_pmu {
+	interrupt-affinity = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
+};

arch/arm64/boot/dts/realtek/rtd139x.dtsi

@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * Realtek RTD1395 SoC family
+ *
+ * Copyright (c) 2019 Andreas Färber
+ */
+
+/memreserve/	0x0000000000000000 0x000000000002f000;
+/memreserve/	0x000000000002f000 0x00000000000d1000;
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/reset/realtek,rtd1295.h>
+
+/ {
+	interrupt-parent = <&gic>;
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		rpc_comm: rpc@2f000 {
+			reg = <0x2f000 0x1000>;
+		};
+
+		rpc_ringbuf: rpc@1ffe000 {
+			reg = <0x1ffe000 0x4000>;
+		};
+
+		tee: tee@10100000 {
+			reg = <0x10100000 0xf00000>;
+			no-map;
+		};
+	};
+
+	arm_pmu: arm-pmu {
+		compatible = "arm,cortex-a53-pmu";
+		interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	osc27M: osc {
+		compatible = "fixed-clock";
+		clock-frequency = <27000000>;
+		#clock-cells = <0>;
+		clock-output-names = "osc27M";
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x00000000 0x00000000 0x0001f000>, /* boot ROM */
+			 <0x98000000 0x98000000 0x68000000>;
+
+		rbus: bus@98000000 {
+			compatible = "simple-bus";
+			reg = <0x98000000 0x200000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0x0 0x98000000 0x200000>;
+
+			reset1: reset-controller@0 {
+				compatible = "snps,dw-low-reset";
+				reg = <0x0 0x4>;
+				#reset-cells = <1>;
+			};
+
+			reset2: reset-controller@4 {
+				compatible = "snps,dw-low-reset";
+				reg = <0x4 0x4>;
+				#reset-cells = <1>;
+			};
+
+			reset3: reset-controller@8 {
+				compatible = "snps,dw-low-reset";
+				reg = <0x8 0x4>;
+				#reset-cells = <1>;
+			};
+
+			reset4: reset-controller@50 {
+				compatible = "snps,dw-low-reset";
+				reg = <0x50 0x4>;
+				#reset-cells = <1>;
+			};
+
+			iso_reset: reset-controller@7088 {
+				compatible = "snps,dw-low-reset";
+				reg = <0x7088 0x4>;
+				#reset-cells = <1>;
+			};
+
+			wdt: watchdog@7680 {
+				compatible = "realtek,rtd1295-watchdog";
+				reg = <0x7680 0x100>;
+				clocks = <&osc27M>;
+			};
+
+			uart0: serial@7800 {
+				compatible = "snps,dw-apb-uart";
+				reg = <0x7800 0x400>;
+				reg-shift = <2>;
+				reg-io-width = <4>;
+				clock-frequency = <27000000>;
+				resets = <&iso_reset RTD1295_ISO_RSTN_UR0>;
+				status = "disabled";
+			};
+
+			uart1: serial@1b200 {
+				compatible = "snps,dw-apb-uart";
+				reg = <0x1b200 0x100>;
+				reg-shift = <2>;
+				reg-io-width = <4>;
+				clock-frequency = <432000000>;
+				resets = <&reset2 RTD1295_RSTN_UR1>;
+				status = "disabled";
+			};
+
+			uart2: serial@1b400 {
+				compatible = "snps,dw-apb-uart";
+				reg = <0x1b400 0x100>;
+				reg-shift = <2>;
+				reg-io-width = <4>;
+				clock-frequency = <432000000>;
+				resets = <&reset2 RTD1295_RSTN_UR2>;
+				status = "disabled";
+			};
+		};
+
+		gic: interrupt-controller@ff011000 {
+			compatible = "arm,gic-400";
+			reg = <0xff011000 0x1000>,
+			      <0xff012000 0x2000>,
+			      <0xff014000 0x2000>,
+			      <0xff016000 0x2000>;
+			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+			interrupt-controller;
+			#interrupt-cells = <3>;
+		};
+	};
+};