riscv: add initial support for Canaan Kendryte K230

Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml

@@ -65,6 +65,7 @@ properties:
       - items:
           - enum:
               - allwinner,sun20i-d1-plic
+              - canaan,k230-plic
               - sophgo,cv1800b-plic
               - sophgo,cv1812h-plic
               - sophgo,sg2042-plic

Documentation/devicetree/bindings/riscv/canaan.yaml

@@ -10,7 +10,7 @@ maintainers:
   - Damien Le Moal <dlemoal@kernel.org>
 
 description:
-  Canaan Kendryte K210 SoC-based boards
+  Canaan Kendryte SoC-based boards
 
 properties:
   $nodename:
@@ -42,6 +42,12 @@ properties:
       - items:
           - const: canaan,kendryte-k210
 
+      - items:
+          - enum:
+              - canaan,canmv-k230
+              - canaan,k230-usip-lp3-evb
+          - const: canaan,kendryte-k230
+
 additionalProperties: true
 
 ...

Documentation/devicetree/bindings/riscv/cpus.yaml

@@ -47,6 +47,7 @@ properties:
               - sifive,u74
               - sifive,u74-mc
               - thead,c906
+              - thead,c908
               - thead,c910
               - thead,c920
           - const: riscv

Documentation/devicetree/bindings/timer/sifive,clint.yaml

@@ -38,6 +38,7 @@ properties:
       - items:
           - enum:
               - allwinner,sun20i-d1-clint
+              - canaan,k230-clint
               - sophgo,cv1800b-clint
               - sophgo,cv1812h-clint
               - thead,th1520-clint

arch/riscv/boot/dts/canaan/Makefile

@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_CANAAN) += canaan_kd233.dtb
 dtb-$(CONFIG_ARCH_CANAAN) += k210_generic.dtb
+dtb-$(CONFIG_ARCH_CANAAN) += k230-canmv.dtb
+dtb-$(CONFIG_ARCH_CANAAN) += k230-evb.dtb
 dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_bit.dtb
 dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_dock.dtb
 dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_go.dtb

arch/riscv/boot/dts/canaan/k230-canmv.dts

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
+ */
+
+#include "k230.dtsi"
+
+/ {
+	model = "Canaan CanMV-K230";
+	compatible = "canaan,canmv-k230", "canaan,kendryte-k230";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	ddr: memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x20000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};

arch/riscv/boot/dts/canaan/k230-evb.dts

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
+ */
+
+#include "k230.dtsi"
+
+/ {
+	model = "Kendryte K230 EVB";
+	compatible = "canaan,k230-usip-lp3-evb", "canaan,kendryte-k230";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	ddr: memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x20000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};

arch/riscv/boot/dts/canaan/k230.dtsi

@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
+ */
+
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/dts-v1/;
+/ {
+	#address-cells = <2>;
+	#size-cells = <2>;
+	compatible = "canaan,kendryte-k230";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		timebase-frequency = <27000000>;
+
+		cpu@0 {
+			compatible = "thead,c908", "riscv";
+			device_type = "cpu";
+			reg = <0>;
+			riscv,isa = "rv64imafdcv_zba_zbb_zbc_zbs_zicbom_zicbop_zicboz_svpbmt";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zba", "zbb",
+					       "zbc", "zbs", "zicbom", "zicbop", "zicboz",
+					       "zicntr", "zicsr", "zifencei", "zihpm", "svpbmt";
+			riscv,cbom-block-size = <64>;
+			riscv,cbop-block-size = <64>;
+			riscv,cboz-block-size = <64>;
+			d-cache-block-size = <64>;
+			d-cache-sets = <128>;
+			d-cache-size = <32768>;
+			i-cache-block-size = <64>;
+			i-cache-sets = <128>;
+			i-cache-size = <32768>;
+			next-level-cache = <&l2_cache>;
+			mmu-type = "riscv,sv39";
+
+			cpu0_intc: interrupt-controller {
+				compatible = "riscv,cpu-intc";
+				interrupt-controller;
+				#interrupt-cells = <1>;
+			};
+		};
+
+		l2_cache: l2-cache {
+			compatible = "cache";
+			cache-block-size = <64>;
+			cache-level = <2>;
+			cache-size = <262144>;
+			cache-sets = <256>;
+			cache-unified;
+		};
+	};
+
+	apb_clk: apb-clk-clock {
+		compatible = "fixed-clock";
+		clock-frequency = <50000000>;
+		clock-output-names = "apb_clk";
+		#clock-cells = <0>;
+	};
+
+	soc {
+		compatible = "simple-bus";
+		interrupt-parent = <&plic>;
+		#address-cells = <2>;
+		#size-cells = <2>;
+		dma-noncoherent;
+		ranges;
+
+		plic: interrupt-controller@f00000000 {
+			compatible = "canaan,k230-plic" ,"thead,c900-plic";
+			reg = <0xf 0x00000000 0x0 0x04000000>;
+			interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 9>;
+			interrupt-controller;
+			#address-cells = <0>;
+			#interrupt-cells = <2>;
+			riscv,ndev = <208>;
+		};
+
+		clint: timer@f04000000 {
+			compatible = "canaan,k230-clint", "thead,c900-clint";
+			reg = <0xf 0x04000000 0x0 0x00010000>;
+			interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
+		};
+
+		uart0: serial@91400000 {
+			compatible = "snps,dw-apb-uart";
+			reg = <0x0 0x91400000 0x0 0x1000>;
+			clocks = <&apb_clk>;
+			interrupts = <16 IRQ_TYPE_LEVEL_HIGH>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			status = "disabled";
+		};
+
+		uart1: serial@91401000 {
+			compatible = "snps,dw-apb-uart";
+			reg = <0x0 0x91401000 0x0 0x1000>;
+			clocks = <&apb_clk>;
+			interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			status = "disabled";
+		};
+
+		uart2: serial@91402000 {
+			compatible = "snps,dw-apb-uart";
+			reg = <0x0 0x91402000 0x0 0x1000>;
+			clocks = <&apb_clk>;
+			interrupts = <18 IRQ_TYPE_LEVEL_HIGH>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			status = "disabled";
+		};
+
+		uart3: serial@91403000 {
+			compatible = "snps,dw-apb-uart";
+			reg = <0x0 0x91403000 0x0 0x1000>;
+			clocks = <&apb_clk>;
+			interrupts = <19 IRQ_TYPE_LEVEL_HIGH>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			status = "disabled";
+		};
+
+		uart4: serial@91404000 {
+			compatible = "snps,dw-apb-uart";
+			reg = <0x0 0x91404000 0x0 0x1000>;
+			clocks = <&apb_clk>;
+			interrupts = <20 IRQ_TYPE_LEVEL_HIGH>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			status = "disabled";
+		};
+	};
+};

arch/riscv/configs/defconfig

@@ -33,6 +33,7 @@ CONFIG_SOC_STARFIVE=y
 CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_THEAD=y
 CONFIG_SOC_VIRT=y
+CONFIG_ARCH_CANAAN=y
 CONFIG_SMP=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_PM=y