[PATCH v2 4/9] dt-bindings: interrupt-controller: add Andes machine-level software interrupt controller

[PATCH v2 4/9] dt-bindings: interrupt-controller: add Andes machine-level software interrupt controller

[Ben Zong-You Xie]

Add the DT binding documentation for Andes machine-level software
interrupt controller.

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 (PLICSW). PLICSW can generate machine-level software
interrupts through programming its registers.

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 .../andestech,plicsw.yaml                     | 54 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml b/Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml
new file mode 100644
index 000000000000..eb2eb611ac09
--- /dev/null
+++ b/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>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 8ac96b1f2e09..856753183687 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20812,6 +20812,7 @@ F:	include/linux/irqchip/riscv-imsic.h
 RISC-V ANDES SoC Support
 M:	Ben Zong-You Xie <ben717@andestech.com>
 S:	Maintained
+F:	Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml
 F:	Documentation/devicetree/bindings/riscv/andes.yaml
 
 RISC-V ARCHITECTURE
-- 
2.34.1

Re: [PATCH v2 4/9] dt-bindings: interrupt-controller: add Andes machine-level software interrupt controller

[Conor Dooley]

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On Sat, May 03, 2025 at 11:18:24PM +0800, Ben Zong-You Xie wrote:
> Add the DT binding documentation for Andes machine-level software
> interrupt controller.
> 
> 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 (PLICSW). PLICSW can generate machine-level software
> interrupts through programming its registers.
> 
> Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

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[PATCH v2 0/9] add Voyager board support

[Ben Zong-You Xie]

The Voyager is a 9.6” x 9.6” Micro ATX form factor development board
including Andes QiLai SoC. This patch series adds minimal device tree
files for the QiLai SoC and the Voyager board [1].

Now only support basic uart drivers to boot up into a basic console. Other
features will be added later.

[1] https://www.andestech.com/en/products-solutions/andeshape-platforms/qilai-chip/
[2] https://lore.kernel.org/all/20250602060747.689824-1-ben717@andestech.com/
---
Changes since v1:
* Patch 1
  - Deselect two configs for ARCH_ANDES since QiLai SoC does not need them (Prabhakar)
  - Revert the changes for config ERRATA_ANDES_CMO
* Patch 3
  - Add reviewed-by Prabhakar
* Patch 9 (new)
  - Gather all the changes for MAINTAINERS in a single patch (Arnd)

Link to v1: https://lore.kernel.org/all/20250704081451.2011407-1-ben717@andestech.com/
---
Ben Zong-You Xie (9):
  riscv: add Andes SoC family Kconfig support
  dt-bindings: riscv: add Andes QiLai SoC and the Voyager board bindings
  dt-bindings: interrupt-controller: add Andes QiLai PLIC
  dt-bindings: interrupt-controller: add Andes machine-level software
    interrupt controller
  dt-bindings: timer: add Andes machine timer
  riscv: dts: andes: add QiLai SoC device tree
  riscv: dts: andes: add Voyager board device tree
  riscv: defconfig: enable Andes SoC
  MAINTAINERS: Add entry for Andes SoC

 .../andestech,plicsw.yaml                     |  54 +++++
 .../sifive,plic-1.0.0.yaml                    |   1 +
 .../devicetree/bindings/riscv/andes.yaml      |  25 +++
 .../bindings/timer/andestech,plmt0.yaml       |  53 +++++
 MAINTAINERS                                   |   9 +
 arch/riscv/Kconfig.socs                       |   7 +
 arch/riscv/boot/dts/Makefile                  |   1 +
 arch/riscv/boot/dts/andes/Makefile            |   2 +
 arch/riscv/boot/dts/andes/qilai-voyager.dts   |  28 +++
 arch/riscv/boot/dts/andes/qilai.dtsi          | 186 ++++++++++++++++++
 arch/riscv/configs/defconfig                  |   1 +
 11 files changed, 367 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml
 create mode 100644 Documentation/devicetree/bindings/riscv/andes.yaml
 create mode 100644 Documentation/devicetree/bindings/timer/andestech,plmt0.yaml
 create mode 100644 arch/riscv/boot/dts/andes/Makefile
 create mode 100644 arch/riscv/boot/dts/andes/qilai-voyager.dts
 create mode 100644 arch/riscv/boot/dts/andes/qilai.dtsi

--
2.34.1

[PATCH v2 1/9] riscv: add Andes SoC family Kconfig support

[Ben Zong-You Xie]

The first SoC in the Andes series is QiLai. It includes a high-performance
quad-core RISC-V AX45MP cluster and one NX27V vector processor.

For further information, refer to [1].

[1] https://www.andestech.com/en/products-solutions/andeshape-platforms/qilai-chip/

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 arch/riscv/Kconfig.socs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index a9c3d2f6debc..61ceae0aa27a 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -1,5 +1,12 @@
 menu "SoC selection"
 
+config ARCH_ANDES
+	bool "Andes SoCs"
+	depends on MMU && !XIP_KERNEL
+	select ERRATA_ANDES
+	help
+	  This enables support for Andes SoC platform hardware.
+
 config ARCH_MICROCHIP_POLARFIRE
 	def_bool ARCH_MICROCHIP
 
-- 
2.34.1

[PATCH v2 2/9] dt-bindings: riscv: add Andes QiLai SoC and the Voyager board bindings

[Ben Zong-You Xie]

Add DT binding documentation for the Andes QiLai SoC and the
Voyager development board.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 .../devicetree/bindings/riscv/andes.yaml      | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/riscv/andes.yaml

diff --git a/Documentation/devicetree/bindings/riscv/andes.yaml b/Documentation/devicetree/bindings/riscv/andes.yaml
new file mode 100644
index 000000000000..aa1edf1fdec7
--- /dev/null
+++ b/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
-- 
2.34.1

[PATCH v2 3/9] dt-bindings: interrupt-controller: add Andes QiLai PLIC

[Ben Zong-You Xie]

Add a new compatible string for Andes QiLai PLIC.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 .../bindings/interrupt-controller/sifive,plic-1.0.0.yaml         | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
index ffc4768bad06..5b827bc24301 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
+++ b/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:
-- 
2.34.1

[PATCH v2 4/9] dt-bindings: interrupt-controller: add Andes machine-level software interrupt controller

[Ben Zong-You Xie]

Add the DT binding documentation for Andes machine-level software
interrupt controller.

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 (PLICSW). PLICSW can generate machine-level software
interrupts through programming its registers.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 .../andestech,plicsw.yaml                     | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml b/Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml
new file mode 100644
index 000000000000..eb2eb611ac09
--- /dev/null
+++ b/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>;
+    };
-- 
2.34.1

[PATCH v2 5/9] dt-bindings: timer: add Andes machine timer

[Ben Zong-You Xie]

Add the DT binding documentation for Andes machine timer.

The RISC-V architecture defines a machine timer that provides a real-time
counter and generates timer interrupts. Andes machiner timer (PLMT0) is
the implementation of the machine timer, and it contains memory-mapped
registers (mtime and mtimecmp). This device supports up to 32 cores.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 .../bindings/timer/andestech,plmt0.yaml       | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/andestech,plmt0.yaml

diff --git a/Documentation/devicetree/bindings/timer/andestech,plmt0.yaml b/Documentation/devicetree/bindings/timer/andestech,plmt0.yaml
new file mode 100644
index 000000000000..90b612096004
--- /dev/null
+++ b/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>;
+    };
-- 
2.34.1

[PATCH v2 6/9] riscv: dts: andes: add QiLai SoC device tree

[Ben Zong-You Xie]

Introduce the initial device tree support for the Andes QiLai SoC.

For further information, you can refer to [1].

[1] https://www.andestech.com/en/products-solutions/andeshape-platforms/qilai-chip/

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 arch/riscv/boot/dts/andes/qilai.dtsi | 186 +++++++++++++++++++++++++++
 1 file changed, 186 insertions(+)
 create mode 100644 arch/riscv/boot/dts/andes/qilai.dtsi

diff --git a/arch/riscv/boot/dts/andes/qilai.dtsi b/arch/riscv/boot/dts/andes/qilai.dtsi
new file mode 100644
index 000000000000..de3de32f8c39
--- /dev/null
+++ b/arch/riscv/boot/dts/andes/qilai.dtsi
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2025 Andes Technology Corporation. All rights reserved.
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		timebase-frequency = <62500000>;
+
+		cpu0: cpu@0 {
+			compatible = "andestech,ax45mp", "riscv";
+			device_type = "cpu";
+			reg = <0>;
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+					       "zicntr", "zicsr", "zifencei",
+					       "zihpm", "xandespmu";
+			mmu-type = "riscv,sv39";
+			clock-frequency = <100000000>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <256>;
+			i-cache-line-size = <64>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <128>;
+			d-cache-line-size = <64>;
+			next-level-cache = <&l2_cache>;
+
+			cpu0_intc: interrupt-controller {
+				compatible = "andestech,cpu-intc", "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
+		cpu1: cpu@1 {
+			compatible = "andestech,ax45mp", "riscv";
+			device_type = "cpu";
+			reg = <1>;
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+					       "zicntr", "zicsr", "zifencei",
+					       "zihpm", "xandespmu";
+			mmu-type = "riscv,sv39";
+			clock-frequency = <100000000>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <256>;
+			i-cache-line-size = <64>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <128>;
+			d-cache-line-size = <64>;
+			next-level-cache = <&l2_cache>;
+
+			cpu1_intc: interrupt-controller {
+				compatible = "andestech,cpu-intc",
+					     "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
+		cpu2: cpu@2 {
+			compatible = "andestech,ax45mp", "riscv";
+			device_type = "cpu";
+			reg = <2>;
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+					       "zicntr", "zicsr", "zifencei",
+					       "zihpm", "xandespmu";
+			mmu-type = "riscv,sv39";
+			clock-frequency = <100000000>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <256>;
+			i-cache-line-size = <64>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <128>;
+			d-cache-line-size = <64>;
+			next-level-cache = <&l2_cache>;
+
+			cpu2_intc: interrupt-controller {
+				compatible = "andestech,cpu-intc",
+					     "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+
+		cpu3: cpu@3 {
+			compatible = "andestech,ax45mp", "riscv";
+			device_type = "cpu";
+			reg = <3>;
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+					       "zicntr", "zicsr", "zifencei",
+					       "zihpm", "xandespmu";
+			mmu-type = "riscv,sv39";
+			clock-frequency = <100000000>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <256>;
+			i-cache-line-size = <64>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <128>;
+			d-cache-line-size = <64>;
+			next-level-cache = <&l2_cache>;
+
+			cpu3_intc: interrupt-controller {
+				compatible = "andestech,cpu-intc",
+					     "riscv,cpu-intc";
+				#interrupt-cells = <1>;
+				interrupt-controller;
+			};
+		};
+	};
+
+	soc {
+		compatible = "simple-bus";
+		ranges;
+		interrupt-parent = <&plic>;
+		#address-cells = <2>;
+		#size-cells = <2>;
+
+		plmt: timer@100000 {
+			compatible = "andestech,qilai-plmt", "andestech,plmt0";
+			reg = <0x0 0x00100000 0x0 0x100000>;
+			interrupts-extended = <&cpu0_intc 7>,
+					      <&cpu1_intc 7>,
+					      <&cpu2_intc 7>,
+					      <&cpu3_intc 7>;
+		};
+
+		l2_cache: cache-controller@200000 {
+			compatible = "andestech,qilai-ax45mp-cache",
+				     "andestech,ax45mp-cache", "cache";
+			reg = <0x0 0x00200000 0x0 0x100000>;
+			interrupts = <16 IRQ_TYPE_LEVEL_HIGH>;
+			cache-line-size = <64>;
+			cache-level = <2>;
+			cache-sets = <2048>;
+			cache-size = <0x200000>;
+			cache-unified;
+		};
+
+		plic_sw: interrupt-controller@400000 {
+			compatible = "andestech,qilai-plicsw",
+				     "andestech,plicsw";
+			reg = <0x0 0x00400000 0x0 0x400000>;
+			interrupts-extended = <&cpu0_intc 3>,
+					      <&cpu1_intc 3>,
+					      <&cpu2_intc 3>,
+					      <&cpu3_intc 3>;
+		};
+
+		plic: interrupt-controller@2000000 {
+			compatible = "andestech,qilai-plic",
+				     "andestech,nceplic100";
+			reg = <0x0 0x02000000 0x0 0x2000000>;
+			#address-cells = <0>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 9>,
+					      <&cpu1_intc 11>, <&cpu1_intc 9>,
+					      <&cpu2_intc 11>, <&cpu2_intc 9>,
+					      <&cpu3_intc 11>, <&cpu3_intc 9>;
+			riscv,ndev = <71>;
+		};
+
+		uart0: serial@30300000 {
+			compatible = "andestech,uart16550", "ns16550a";
+			reg = <0x0 0x30300000 0x0 0x100000>;
+			interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
+			clock-frequency = <50000000>;
+			reg-offset = <32>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			no-loopback-test;
+		};
+	};
+};
-- 
2.34.1

[PATCH v2 7/9] riscv: dts: andes: add Voyager board device tree

[Ben Zong-You Xie]

Introduce the device tree support for Voyager development board.

Currently only support booting into console with only uart,
other features will be added later.

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 arch/riscv/boot/dts/Makefile                |  1 +
 arch/riscv/boot/dts/andes/Makefile          |  2 ++
 arch/riscv/boot/dts/andes/qilai-voyager.dts | 28 +++++++++++++++++++++
 3 files changed, 31 insertions(+)
 create mode 100644 arch/riscv/boot/dts/andes/Makefile
 create mode 100644 arch/riscv/boot/dts/andes/qilai-voyager.dts

diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile
index 64a898da9aee..3b99e91efa25 100644
--- a/arch/riscv/boot/dts/Makefile
+++ b/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
diff --git a/arch/riscv/boot/dts/andes/Makefile b/arch/riscv/boot/dts/andes/Makefile
new file mode 100644
index 000000000000..c545c668ef70
--- /dev/null
+++ b/arch/riscv/boot/dts/andes/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_ANDES) += qilai-voyager.dtb
diff --git a/arch/riscv/boot/dts/andes/qilai-voyager.dts b/arch/riscv/boot/dts/andes/qilai-voyager.dts
new file mode 100644
index 000000000000..fa7d2b32a9b4
--- /dev/null
+++ b/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";
+};
-- 
2.34.1

[PATCH v2 8/9] riscv: defconfig: enable Andes SoC

[Ben Zong-You Xie]

Enable Andes SoC config in defconfig to allow the default
upstream kernel to boot on Voyager board.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 arch/riscv/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
index fe8bd8afb418..12f5f6ec00fa 100644
--- a/arch/riscv/configs/defconfig
+++ b/arch/riscv/configs/defconfig
@@ -22,6 +22,7 @@ CONFIG_USER_NS=y
 CONFIG_CHECKPOINT_RESTORE=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_PROFILING=y
+CONFIG_ARCH_ANDES=y
 CONFIG_ARCH_MICROCHIP=y
 CONFIG_ARCH_SIFIVE=y
 CONFIG_ARCH_SOPHGO=y
-- 
2.34.1

[PATCH v2 9/9] MAINTAINERS: Add entry for Andes SoC

[Ben Zong-You Xie]

Add entry for Andes SoC maintainer and related files

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 MAINTAINERS | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index d79d546c2f95..3e16da28de50 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21318,6 +21318,15 @@ 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>
-- 
2.34.1

Re: [PATCH v2 5/9] dt-bindings: timer: add Andes machine timer

[Daniel Lezcano]

On Fri, Jul 11, 2025 at 09:30:21PM +0800, Ben Zong-You Xie wrote:
> Add the DT binding documentation for Andes machine timer.
> 
> The RISC-V architecture defines a machine timer that provides a real-time
> counter and generates timer interrupts. Andes machiner timer (PLMT0) is
> the implementation of the machine timer, and it contains memory-mapped
> registers (mtime and mtimecmp). This device supports up to 32 cores.
> 
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
> ---

Applied patch 5/9, thanks

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[tip: timers/clocksource] dt-bindings: timer: add Andes machine timer

[tip-bot2 for Ben Zong-You Xie]

The following commit has been merged into the timers/clocksource branch of tip:

Commit-ID:     c4a134f5af13776bc546a51b5ee68f0f48d390d8
Gitweb:        https://git.kernel.org/tip/c4a134f5af13776bc546a51b5ee68f0f48d390d8
Author:        Ben Zong-You Xie <ben717@andestech.com>
AuthorDate:    Fri, 11 Jul 2025 21:30:21 +08:00
Committer:     Daniel Lezcano <daniel.lezcano@linaro.org>
CommitterDate: Mon, 14 Jul 2025 18:17:20 +02:00

dt-bindings: timer: add Andes machine timer

Add the DT binding documentation for Andes machine timer.

The RISC-V architecture defines a machine timer that provides a real-time
counter and generates timer interrupts. Andes machiner timer (PLMT0) is
the implementation of the machine timer, and it contains memory-mapped
registers (mtime and mtimecmp). This device supports up to 32 cores.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
Link: https://lore.kernel.org/r/20250711133025.2192404-6-ben717@andestech.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 Documentation/devicetree/bindings/timer/andestech,plmt0.yaml | 53 +++++++-
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/andestech,plmt0.yaml

diff --git a/Documentation/devicetree/bindings/timer/andestech,plmt0.yaml b/Documentation/devicetree/bindings/timer/andestech,plmt0.yaml
new file mode 100644
index 0000000..90b6120
--- /dev/null
+++ b/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>;
+    };

[tip: timers/clocksource] dt-bindings: timer: Add Andes machine timer

[tip-bot2 for Ben Zong-You Xie]

The following commit has been merged into the timers/clocksource branch of tip:

Commit-ID:     1294b89e0d11966231ce237ed2ef0f24bf2cff84
Gitweb:        https://git.kernel.org/tip/1294b89e0d11966231ce237ed2ef0f24bf2cff84
Author:        Ben Zong-You Xie <ben717@andestech.com>
AuthorDate:    Fri, 11 Jul 2025 21:30:21 +08:00
Committer:     Ingo Molnar <mingo@kernel.org>
CommitterDate: Fri, 25 Jul 2025 12:04:51 +02:00

dt-bindings: timer: Add Andes machine timer

Add the DT binding documentation for Andes machine timer.

The RISC-V architecture defines a machine timer that provides a real-time
counter and generates timer interrupts. Andes machiner timer (PLMT0) is
the implementation of the machine timer, and it contains memory-mapped
registers (mtime and mtimecmp). This device supports up to 32 cores.

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250711133025.2192404-6-ben717@andestech.com
---
 Documentation/devicetree/bindings/timer/andestech,plmt0.yaml | 53 +++++++-
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/andestech,plmt0.yaml

diff --git a/Documentation/devicetree/bindings/timer/andestech,plmt0.yaml b/Documentation/devicetree/bindings/timer/andestech,plmt0.yaml
new file mode 100644
index 0000000..90b6120
--- /dev/null
+++ b/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>;
+    };

Re: [PATCH v2 0/9] add Voyager board support

[patchwork-bot+linux-riscv]

Hello:

This series was applied to riscv/linux.git (fixes)
by Arnd Bergmann <arnd@arndb.de>:

On Fri, 11 Jul 2025 21:30:16 +0800 you wrote:
> The Voyager is a 9.6” x 9.6” Micro ATX form factor development board
> including Andes QiLai SoC. This patch series adds minimal device tree
> files for the QiLai SoC and the Voyager board [1].
> 
> Now only support basic uart drivers to boot up into a basic console. Other
> features will be added later.
> 
> [...]

Here is the summary with links:
  - [v2,1/9] riscv: add Andes SoC family Kconfig support
    https://git.kernel.org/riscv/c/00dba19aa005
  - [v2,2/9] dt-bindings: riscv: add Andes QiLai SoC and the Voyager board bindings
    (no matching commit)
  - [v2,3/9] dt-bindings: interrupt-controller: add Andes QiLai PLIC
    (no matching commit)
  - [v2,4/9] dt-bindings: interrupt-controller: add Andes machine-level software interrupt controller
    (no matching commit)
  - [v2,5/9] dt-bindings: timer: add Andes machine timer
    (no matching commit)
  - [v2,6/9] riscv: dts: andes: add QiLai SoC device tree
    (no matching commit)
  - [v2,7/9] riscv: dts: andes: add Voyager board device tree
    (no matching commit)
  - [v2,8/9] riscv: defconfig: enable Andes SoC
    (no matching commit)
  - [v2,9/9] MAINTAINERS: Add entry for Andes SoC
    (no matching commit)

You are awesome, thank you!
-- 
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