arm64: dts: cix: Add sky1 base dts initial support

CIX SKY1 SoC is high performance Armv9 SoC designed by Cixtech,
and Orion O6 is the motherboard launched by Radxa. See below for
detail:
https://docs.radxa.com/en/orion/o6/getting-started/introduction

In this commit, it only adds limited components for running initramfs
at Orion O6.

Reviewed-by: Krzysztof Kozlowski <[email protected]>
Tested-by: Enric Balletbo i Serra <[email protected]>
Tested-by: Kajetan Puchalski <[email protected]>
Signed-off-by: Peter Chen <[email protected]>
Signed-off-by: Guomin Chen <[email protected]>
Signed-off-by: Gary Yang <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

Author: Peter Chen

arch/arm64/boot/dts/Makefile

@@ -13,6 +13,7 @@ subdir-y += bitmain
 subdir-y += blaize
 subdir-y += broadcom
 subdir-y += cavium
+subdir-y += cix
 subdir-y += exynos
 subdir-y += freescale
 subdir-y += hisilicon

arch/arm64/boot/dts/cix/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_CIX) += sky1-orion-o6.dtb

arch/arm64/boot/dts/cix/sky1-orion-o6.dts

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright 2025 Cix Technology Group Co., Ltd.
+ *
+ */
+
+/dts-v1/;
+
+#include "sky1.dtsi"
+/ {
+	model = "Radxa Orion O6";
+	compatible = "radxa,orion-o6", "cix,sky1";
+
+	aliases {
+		serial2 = &uart2;
+	};
+
+	chosen {
+		stdout-path = &uart2;
+	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		linux,cma {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x0 0x28000000>;
+			linux,cma-default;
+		};
+	};
+
+};
+
+&uart2 {
+	status = "okay";
+};

arch/arm64/boot/dts/cix/sky1.dtsi

@@ -0,0 +1,330 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright 2025 Cix Technology Group Co., Ltd.
+ *
+ */
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/clock/cix,sky1.h>
+
+/ {
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	cpus {
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		cpu0: cpu@0 {
+			compatible = "arm,cortex-a520";
+			enable-method = "psci";
+			reg = <0x0 0x0>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <403>;
+		};
+
+		cpu1: cpu@100 {
+			compatible = "arm,cortex-a520";
+			enable-method = "psci";
+			reg = <0x0 0x100>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <403>;
+		};
+
+		cpu2: cpu@200 {
+			compatible = "arm,cortex-a520";
+			enable-method = "psci";
+			reg = <0x0 0x200>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <403>;
+		};
+
+		cpu3: cpu@300 {
+			compatible = "arm,cortex-a520";
+			enable-method = "psci";
+			reg = <0x0 0x300>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <403>;
+		};
+
+		cpu4: cpu@400 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0x400>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu5: cpu@500 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0x500>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu6: cpu@600 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0x600>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu7: cpu@700 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0x700>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu8: cpu@800 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0x800>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu9: cpu@900 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0x900>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu10: cpu@a00 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0xa00>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu11: cpu@b00 {
+			compatible = "arm,cortex-a720";
+			enable-method = "psci";
+			reg = <0x0 0xb00>;
+			device_type = "cpu";
+			capacity-dmips-mhz = <1024>;
+		};
+
+		cpu-map {
+			cluster0 {
+				core0 {
+					cpu = <&cpu0>;
+				};
+				core1 {
+					cpu = <&cpu1>;
+				};
+				core2 {
+					cpu = <&cpu2>;
+				};
+				core3 {
+					cpu = <&cpu3>;
+				};
+				core4 {
+					cpu = <&cpu4>;
+				};
+				core5 {
+					cpu = <&cpu5>;
+				};
+				core6 {
+					cpu = <&cpu6>;
+				};
+				core7 {
+					cpu = <&cpu7>;
+				};
+				core8 {
+					cpu = <&cpu8>;
+				};
+				core9 {
+					cpu = <&cpu9>;
+				};
+				core10 {
+					cpu = <&cpu10>;
+				};
+				core11 {
+					cpu = <&cpu11>;
+				};
+			};
+		};
+	};
+
+	firmware {
+		ap_to_pm_scmi: scmi {
+			compatible = "arm,scmi";
+			mbox-names = "tx", "rx";
+			mboxes = <&mbox_ap2pm 8>, <&mbox_pm2ap 8>;
+			shmem = <&ap2pm_scmi_mem>, <&pm2ap_scmi_mem>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			scmi_clk: protocol@14 {
+				reg = <0x14>;
+				#clock-cells = <1>;
+			};
+		};
+	};
+
+	pmu-a520 {
+		compatible = "arm,cortex-a520-pmu";
+		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW &ppi_partition0>;
+	};
+
+	pmu-a720 {
+		compatible = "arm,cortex-a720-pmu";
+		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW &ppi_partition1>;
+	};
+
+	psci {
+		compatible = "arm,psci-1.0";
+		method = "smc";
+	};
+
+	soc@0 {
+		compatible = "simple-bus";
+		ranges = <0 0 0 0 0x20 0>;
+		dma-ranges;
+		#address-cells = <2>;
+		#size-cells = <2>;
+
+		uart0: serial@40b0000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x0 0x040b0000 0x0 0x1000>;
+			interrupts = <GIC_SPI 296 IRQ_TYPE_LEVEL_HIGH 0>;
+			clocks = <&scmi_clk CLK_TREE_FCH_UART0_FUNC>, <&scmi_clk CLK_TREE_FCH_UART0_APB>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		uart1: serial@40c0000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x0 0x040c0000 0x0 0x1000>;
+			interrupts = <GIC_SPI 297 IRQ_TYPE_LEVEL_HIGH 0>;
+			clocks = <&scmi_clk CLK_TREE_FCH_UART1_FUNC>, <&scmi_clk CLK_TREE_FCH_UART1_APB>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		uart2: serial@40d0000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x0 0x040d0000 0x0 0x1000>;
+			interrupts = <GIC_SPI 298 IRQ_TYPE_LEVEL_HIGH 0>;
+			clocks = <&scmi_clk CLK_TREE_FCH_UART2_FUNC>, <&scmi_clk CLK_TREE_FCH_UART2_APB>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		uart3: serial@40e0000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x0 0x040e0000 0x0 0x1000>;
+			interrupts = <GIC_SPI 299 IRQ_TYPE_LEVEL_HIGH 0>;
+			clocks = <&scmi_clk CLK_TREE_FCH_UART3_FUNC>, <&scmi_clk CLK_TREE_FCH_UART3_APB>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+
+		mbox_ap2se: mailbox@5060000 {
+			compatible = "cix,sky1-mbox";
+			reg = <0x0 0x05060000 0x0 0x10000>;
+			interrupts = <GIC_SPI 378 IRQ_TYPE_LEVEL_HIGH 0>;
+			#mbox-cells = <1>;
+			cix,mbox-dir = "tx";
+		};
+
+		mbox_se2ap: mailbox@5070000 {
+			compatible = "cix,sky1-mbox";
+			reg = <0x0 0x05070000 0x0 0x10000>;
+			interrupts = <GIC_SPI 379 IRQ_TYPE_LEVEL_HIGH 0>;
+			#mbox-cells = <1>;
+			cix,mbox-dir = "rx";
+		};
+
+		ap2pm_scmi_mem: shmem@6590000 {
+			compatible = "arm,scmi-shmem";
+			reg = <0x0 0x06590000 0x0 0x80>;
+			reg-io-width = <4>;
+		};
+
+		mbox_ap2pm: mailbox@6590080 {
+			compatible = "cix,sky1-mbox";
+			reg = <0x0 0x06590080 0x0 0xff80>;
+			interrupts = <GIC_SPI 363 IRQ_TYPE_LEVEL_HIGH 0>;
+			#mbox-cells = <1>;
+			cix,mbox-dir = "tx";
+		};
+
+		pm2ap_scmi_mem: shmem@65a0000 {
+			compatible = "arm,scmi-shmem";
+			reg = <0x0 0x065a0000 0x0 0x80>;
+			reg-io-width = <4>;
+		};
+
+		mbox_pm2ap: mailbox@65a0080 {
+			compatible = "cix,sky1-mbox";
+			reg = <0x0 0x065a0080 0x0 0xff80>;
+			interrupts = <GIC_SPI 359 IRQ_TYPE_LEVEL_HIGH 0>;
+			#mbox-cells = <1>;
+			cix,mbox-dir = "rx";
+		};
+
+		mbox_sfh2ap: mailbox@8090000 {
+			compatible = "cix,sky1-mbox";
+			reg = <0x0 0x08090000 0x0 0x10000>;
+			interrupts = <GIC_SPI 391 IRQ_TYPE_LEVEL_HIGH 0>;
+			#mbox-cells = <1>;
+			cix,mbox-dir = "rx";
+		};
+
+		mbox_ap2sfh: mailbox@80a0000 {
+			compatible = "cix,sky1-mbox";
+			reg = <0x0 0x080a0000 0x0 0x10000>;
+			interrupts = <GIC_SPI 392 IRQ_TYPE_LEVEL_HIGH 0>;
+			#mbox-cells = <1>;
+			cix,mbox-dir = "tx";
+		};
+
+		gic: interrupt-controller@e010000 {
+			compatible = "arm,gic-v3";
+			reg = <0x0 0x0e010000 0 0x10000>,	/* GICD */
+			      <0x0 0x0e090000 0 0x300000>;       /* GICR * 12 */
+			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_LOW 0>;
+			#interrupt-cells = <4>;
+			interrupt-controller;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			ranges;
+
+			gic_its: msi-controller@e050000 {
+				compatible = "arm,gic-v3-its";
+				reg = <0x0 0x0e050000 0x0 0x30000>;
+				msi-controller;
+				#msi-cells = <1>;
+			};
+
+			ppi-partitions {
+				ppi_partition0: interrupt-partition-0 {
+					affinity = <&cpu0 &cpu1 &cpu2 &cpu3>;
+				};
+
+				ppi_partition1: interrupt-partition-1 {
+					affinity = <&cpu4 &cpu5 &cpu6 &cpu7 &cpu8 &cpu9 &cpu10 &cpu11>;
+				};
+			};
+		};
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupt-names = "sec-phys", "phys", "virt", "hyp-phys", "hyp-virt";
+		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW 0>,
+			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW 0>,
+			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW 0>,
+			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW 0>,
+			     <GIC_PPI 12 IRQ_TYPE_LEVEL_LOW 0>;
+	};
+};