[PW_SID:967884] add Voyager board support

Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml

@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/andestech,plicsw.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Andes machine-level software interrupt controller
+
+description:
+  In the Andes platform such as QiLai SoC, the PLIC module is instantiated a
+  second time with all interrupt sources tied to zero as the software interrupt
+  controller (PLIC_SW). PLIC_SW directly connects to the machine-mode
+  inter-processor interrupt lines of CPUs, so RISC-V per-CPU local interrupt
+  controller is the parent interrupt controller for PLIC_SW. PLIC_SW can
+  generate machine-mode inter-processor interrupts through programming its
+  registers.
+
+maintainers:
+  - Ben Zong-You Xie <ben717@andestech.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - andestech,qilai-plicsw
+      - const: andestech,plicsw
+
+  reg:
+    maxItems: 1
+
+  interrupts-extended:
+    minItems: 1
+    maxItems: 15872
+    description:
+      Specifies which harts are connected to the PLIC_SW. Each item must points
+      to a riscv,cpu-intc node, which has a riscv cpu node as parent.
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts-extended
+
+examples:
+  - |
+    interrupt-controller@400000 {
+      compatible = "andestech,qilai-plicsw", "andestech,plicsw";
+      reg = <0x400000 0x400000>;
+      interrupts-extended = <&cpu0intc 3>,
+                            <&cpu1intc 3>,
+                            <&cpu2intc 3>,
+                            <&cpu3intc 3>;
+    };

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

@@ -53,6 +53,7 @@ properties:
     oneOf:
       - items:
           - enum:
+              - andestech,qilai-plic
               - renesas,r9a07g043-plic
           - const: andestech,nceplic100
       - items:

Documentation/devicetree/bindings/riscv/andes.yaml

@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/andes.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Andes SoC-based boards
+
+maintainers:
+  - Ben Zong-You Xie <ben717@andestech.com>
+
+description:
+  Andes SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - andestech,voyager
+          - const: andestech,qilai
+
+additionalProperties: true

Documentation/devicetree/bindings/timer/andestech,plmt0.yaml

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/andestech,plmt0.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Andes machine-level timer
+
+description:
+  The Andes machine-level timer device (PLMT0) provides machine-level timer
+  functionality for a set of HARTs on a RISC-V platform. It has a single
+  fixed-frequency monotonic time counter (MTIME) register and a time compare
+  register (MTIMECMP) for each HART connected to the PLMT0. A timer interrupt is
+  generated if MTIME >= MTIMECMP.
+
+maintainers:
+  - Ben Zong-You Xie <ben717@andestech.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - andestech,qilai-plmt
+      - const: andestech,plmt0
+
+  reg:
+    maxItems: 1
+
+  interrupts-extended:
+    minItems: 1
+    maxItems: 32
+    description:
+      Specifies which harts are connected to the PLMT0. Each item must points
+      to a riscv,cpu-intc node, which has a riscv cpu node as parent. The
+      PLMT0 supports 1 hart up to 32 harts.
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts-extended
+
+examples:
+  - |
+    interrupt-controller@100000 {
+      compatible = "andestech,qilai-plmt", "andestech,plmt0";
+      reg = <0x100000 0x100000>;
+      interrupts-extended = <&cpu0intc 7>,
+                            <&cpu1intc 7>,
+                            <&cpu2intc 7>,
+                            <&cpu3intc 7>;
+    };

MAINTAINERS

@@ -20809,6 +20809,15 @@ F:	drivers/irqchip/irq-riscv-intc.c
 F:	include/linux/irqchip/riscv-aplic.h
 F:	include/linux/irqchip/riscv-imsic.h
 
+RISC-V ANDES SoC Support
+M:	Ben Zong-You Xie <ben717@andestech.com>
+S:	Maintained
+T:	git: https://github.com/ben717-linux/linux
+F:	Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml
+F:	Documentation/devicetree/bindings/riscv/andes.yaml
+F:	Documentation/devicetree/bindings/timer/andestech,plmt0.yaml
+F:	arch/riscv/boot/dts/andes/
+
 RISC-V ARCHITECTURE
 M:	Paul Walmsley <paul.walmsley@sifive.com>
 M:	Palmer Dabbelt <palmer@dabbelt.com>

arch/riscv/Kconfig.errata

@@ -12,7 +12,7 @@ config ERRATA_ANDES
 
 config ERRATA_ANDES_CMO
 	bool "Apply Andes cache management errata"
-	depends on ERRATA_ANDES && ARCH_R9A07G043
+	depends on ERRATA_ANDES && (ARCH_R9A07G043 || ARCH_ANDES)
 	select RISCV_DMA_NONCOHERENT
 	default y
 	help

arch/riscv/Kconfig.socs

@@ -1,5 +1,14 @@
 menu "SoC selection"
 
+config ARCH_ANDES
+	bool "Andes SoCs"
+	depends on MMU && !XIP_KERNEL
+	select ERRATA_ANDES
+	select ERRATA_ANDES_CMO
+	select AX45MP_L2_CACHE
+	help
+	  This enables support for Andes SoC platform hardware.
+
 config ARCH_MICROCHIP_POLARFIRE
 	def_bool ARCH_MICROCHIP
 

arch/riscv/boot/dts/Makefile

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 subdir-y += allwinner
+subdir-y += andes
 subdir-y += canaan
 subdir-y += microchip
 subdir-y += renesas

arch/riscv/boot/dts/andes/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_ANDES) += qilai-voyager.dtb

arch/riscv/boot/dts/andes/qilai-voyager.dts

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2025 Andes Technology Corporation. All rights reserved.
+ */
+
+#include "qilai.dtsi"
+
+/ {
+	model = "Voyager";
+	compatible = "andestech,voyager", "andestech,qilai";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@400000000 {
+		device_type = "memory";
+		reg = <0x4 0x00000000 0x4 0x00000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};