126 lines
2.8 KiB
YAML
126 lines
2.8 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/interrupt-controller/loongson,liointc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Loongson Local I/O Interrupt Controller
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maintainers:
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- Jiaxun Yang <jiaxun.yang@flygoat.com>
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description: |
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This interrupt controller is found in the Loongson-3 family of chips and
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Loongson-2K series chips, as the primary package interrupt controller which
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can route local I/O interrupt to interrupt lines of cores.
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Be aware of the following points.
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1.The Loongson-2K0500 is a single core CPU;
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2.The Loongson-2K0500/2K1000 has 64 device interrupt sources as inputs, so we
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need to define two nodes in dts{i} to describe the "0-31" and "32-61" interrupt
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sources respectively.
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allOf:
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- $ref: /schemas/interrupt-controller.yaml#
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properties:
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compatible:
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enum:
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- loongson,liointc-1.0
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- loongson,liointc-1.0a
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- loongson,liointc-2.0
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reg:
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minItems: 1
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maxItems: 3
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reg-names:
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items:
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- const: main
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- const: isr0
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- const: isr1
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minItems: 2
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interrupt-controller: true
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interrupts:
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description:
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Interrupt source of the CPU interrupts.
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minItems: 1
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maxItems: 4
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interrupt-names:
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description: List of names for the parent interrupts.
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items:
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pattern: int[0-3]
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minItems: 1
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maxItems: 4
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'#interrupt-cells':
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const: 2
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loongson,parent_int_map:
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description: |
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This property points how the children interrupts will be mapped into CPU
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interrupt lines. Each cell refers to a parent interrupt line from 0 to 3
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and each bit in the cell refers to a child interrupt from 0 to 31.
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If a CPU interrupt line didn't connect with liointc, then keep its
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cell with zero.
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 4
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maxItems: 4
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required:
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- compatible
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- reg
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- interrupts
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- interrupt-names
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- interrupt-controller
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- '#interrupt-cells'
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- loongson,parent_int_map
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unevaluatedProperties: false
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if:
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properties:
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compatible:
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contains:
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enum:
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- loongson,liointc-2.0
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then:
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properties:
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reg:
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minItems: 2
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maxItems: 3
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required:
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- reg-names
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else:
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properties:
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reg:
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maxItems: 1
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examples:
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- |
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iointc: interrupt-controller@3ff01400 {
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compatible = "loongson,liointc-1.0";
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reg = <0x3ff01400 0x64>;
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interrupt-controller;
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#interrupt-cells = <2>;
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interrupt-parent = <&cpuintc>;
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interrupts = <2>, <3>;
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interrupt-names = "int0", "int1";
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loongson,parent_int_map = <0xf0ffffff>, /* int0 */
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<0x0f000000>, /* int1 */
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<0x00000000>, /* int2 */
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<0x00000000>; /* int3 */
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};
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...
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