[v4] Add support for LS7A LPC IRQ for MIPS Loongson systems

[PATCH v4 3/6] dt-bindings: interrupt-controller: add LS7A PCH LPC

Posted by Icenowy Zheng 1 week, 5 days ago

Loongson 7A series PCH contains an LPC controller with an interrupt
controller.

Add the device tree binding for the interrupt controller.

Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
---
 .../loongson,pch-lpc.yaml                     | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
new file mode 100644
index 0000000000000..ff2a425b6f0b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/loongson,pch-lpc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson PCH LPC Controller
+
+maintainers:
+  - Jiaxun Yang <jiaxun.yang@flygoat.com>
+
+description:
+  This interrupt controller is found in the Loongson LS7A family of PCH for
+  accepting interrupts sent by LPC-connected peripherals and signalling PIC
+  via a single interrupt line when interrupts are available.
+
+properties:
+  compatible:
+    const: loongson,ls7a-lpc
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  interrupts:
+    maxItems: 1
+
+  '#interrupt-cells':
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - interrupts
+  - '#interrupt-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    lpc: interrupt-controller@10002000 {
+      compatible = "loongson,ls7a-lpc";
+      reg = <0x10002000 0x400>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
+      interrupt-parent = <&pic>;
+      interrupts = <19 IRQ_TYPE_LEVEL_HIGH>;
+    };
+...
-- 
2.52.0

Re: [PATCH v4 3/6] dt-bindings: interrupt-controller: add LS7A PCH LPC

Posted by Rob Herring (Arm) 1 week ago

On Sat, 21 Mar 2026 17:20:29 +0800, Icenowy Zheng wrote:
> Loongson 7A series PCH contains an LPC controller with an interrupt
> controller.
> 
> Add the device tree binding for the interrupt controller.
> 
> Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
> ---
>  .../loongson,pch-lpc.yaml                     | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
> 

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>

Re: [PATCH v4 3/6] dt-bindings: interrupt-controller: add LS7A PCH LPC

Posted by Jiaxun Yang 1 week, 5 days ago


On Sat, 21 Mar 2026, at 9:20 AM, Icenowy Zheng wrote:
> Loongson 7A series PCH contains an LPC controller with an interrupt
> controller.
>
> Add the device tree binding for the interrupt controller.
>
> Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>

Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>

> ---
>  .../loongson,pch-lpc.yaml                     | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 
> Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
>
> diff --git 
> a/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml 
> b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
> new file mode 100644
> index 0000000000000..ff2a425b6f0b8
> --- /dev/null
> +++ 
> b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: 
> http://devicetree.org/schemas/interrupt-controller/loongson,pch-lpc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Loongson PCH LPC Controller
> +
> +maintainers:
> +  - Jiaxun Yang <jiaxun.yang@flygoat.com>
> +
> +description:
> +  This interrupt controller is found in the Loongson LS7A family of 
> PCH for
> +  accepting interrupts sent by LPC-connected peripherals and 
> signalling PIC
> +  via a single interrupt line when interrupts are available.
> +
> +properties:
> +  compatible:
> +    const: loongson,ls7a-lpc
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupt-controller: true
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  '#interrupt-cells':
> +    const: 2
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupt-controller
> +  - interrupts
> +  - '#interrupt-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    lpc: interrupt-controller@10002000 {
> +      compatible = "loongson,ls7a-lpc";
> +      reg = <0x10002000 0x400>;
> +      interrupt-controller;
> +      #interrupt-cells = <2>;
> +      interrupt-parent = <&pic>;
> +      interrupts = <19 IRQ_TYPE_LEVEL_HIGH>;
> +    };
> +...
> -- 
> 2.52.0

-- 
- Jiaxun

[tip: irq/drivers] dt-bindings: interrupt-controller: Add LS7A PCH LPC

Posted by tip-bot2 for Icenowy Zheng 1 week ago

The following commit has been merged into the irq/drivers branch of tip:

Commit-ID:     41bf87bcac02cd788d4325415d4b2e31bf2a694d
Gitweb:        https://git.kernel.org/tip/41bf87bcac02cd788d4325415d4b2e31bf2a694d
Author:        Icenowy Zheng <zhengxingda@iscas.ac.cn>
AuthorDate:    Sat, 21 Mar 2026 17:20:29 +08:00
Committer:     Thomas Gleixner <tglx@kernel.org>
CommitterDate: Thu, 26 Mar 2026 16:15:03 +01:00

dt-bindings: interrupt-controller: Add LS7A PCH LPC

Loongson 7A series PCH contains an LPC controller with an interrupt
controller.

Add the device tree binding for the interrupt controller.

Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260321092032.3502701-4-zhengxingda@iscas.ac.cn
---
 Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
new file mode 100644
index 0000000..ff2a425
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/loongson,pch-lpc.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/loongson,pch-lpc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson PCH LPC Controller
+
+maintainers:
+  - Jiaxun Yang <jiaxun.yang@flygoat.com>
+
+description:
+  This interrupt controller is found in the Loongson LS7A family of PCH for
+  accepting interrupts sent by LPC-connected peripherals and signalling PIC
+  via a single interrupt line when interrupts are available.
+
+properties:
+  compatible:
+    const: loongson,ls7a-lpc
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  interrupts:
+    maxItems: 1
+
+  '#interrupt-cells':
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - interrupts
+  - '#interrupt-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    lpc: interrupt-controller@10002000 {
+      compatible = "loongson,ls7a-lpc";
+      reg = <0x10002000 0x400>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
+      interrupt-parent = <&pic>;
+      interrupts = <19 IRQ_TYPE_LEVEL_HIGH>;
+    };
+...

[PATCH v4 1/6] MIPS: loongson64: Override arch_dynirq_lower_bound to reserve LPC IRQs
[PATCH v4 2/6] LoongArch: Override arch_dynirq_lower_bound to reserve LPC IRQs
[PATCH v4 3/6] dt-bindings: interrupt-controller: add LS7A PCH LPC
[PATCH v4 4/6] irqchip/loongson-pch-lpc: Extract non-ACPI-related code from ACPI init
[PATCH v4 5/6] irqchip/loongson-pch-lpc: Add OF init code
[PATCH v4 6/6] irqchip/loongson-pch-lpc: Enable building on MIPS Loongson64