dt-bindings: interrupt-controller: loongson ls1x intc

Dt-bindings doc about Loongson-1 interrupt controller.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/Documentation/devicetree/bindings/interrupt-controller/loongson,ls1x-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/loongson,ls1x-intc.txt
new file mode 100644 (file)
index 0000000..a63ed9f
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/loongson,ls1x-intc.txt
@@ -0,0 +1,24 @@
+Loongson ls1x Interrupt Controller
+
+Required properties:
+
+- compatible : should be "loongson,ls1x-intc". Valid strings are:
+
+- reg : Specifies base physical address and size of the registers.
+- interrupt-controller : Identifies the node as an interrupt controller
+- #interrupt-cells : Specifies the number of cells needed to encode an
+  interrupt source. The value shall be 2.
+- interrupts : Specifies the CPU interrupt the controller is connected to.
+
+Example:
+
+intc: interrupt-controller@1fd01040 {
+       compatible = "loongson,ls1x-intc";
+       reg = <0x1fd01040 0x18>;
+
+       interrupt-controller;
+       #interrupt-cells = <2>;
+
+       interrupt-parent = <&cpu_intc>;
+       interrupts = <2>;
+};