xref: /linux/Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml (revision 06ed6aa56ffac9241e03a24649e8d048f8f1b10c) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/interrupt-controller/loongson,liointc.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: Loongson Local I/O Interrupt Controller
8
9maintainers:
10  - Jiaxun Yang <jiaxun.yang@flygoat.com>
11
12description: |
13  This interrupt controller is found in the Loongson-3 family of chips as the primary
14  package interrupt controller which can route local I/O interrupt to interrupt lines
15  of cores.
16
17allOf:
18  - $ref: /schemas/interrupt-controller.yaml#
19
20properties:
21  compatible:
22    oneOf:
23      - const: loongson,liointc-1.0
24      - const: loongson,liointc-1.0a
25
26  reg:
27    maxItems: 1
28
29  interrupt-controller: true
30
31  interrupts:
32    description:
33      Interrupt source of the CPU interrupts.
34    minItems: 1
35    maxItems: 4
36
37  interrupt-names:
38    description: List of names for the parent interrupts.
39    items:
40      - const: int0
41      - const: int1
42      - const: int2
43      - const: int3
44    minItems: 1
45    maxItems: 4
46
47  '#interrupt-cells':
48    const: 2
49
50  'loongson,parent_int_map':
51    description: |
52      This property points how the children interrupts will be mapped into CPU
53      interrupt lines. Each cell refers to a parent interrupt line from 0 to 3
54      and each bit in the cell refers to a children interrupt fron 0 to 31.
55      If a CPU interrupt line didn't connected with liointc, then keep it's
56      cell with zero.
57    allOf:
58      - $ref: /schemas/types.yaml#/definitions/uint32-array
59      - minItems: 4
60        maxItems: 4
61
62
63required:
64  - compatible
65  - reg
66  - interrupts
67  - interrupt-controller
68  - '#interrupt-cells'
69  - 'loongson,parent_int_map'
70
71
72examples:
73  - |
74    iointc: interrupt-controller@3ff01400 {
75      compatible = "loongson,liointc-1.0";
76      reg = <0x3ff01400 0x64>;
77
78      interrupt-controller;
79      #interrupt-cells = <2>;
80
81      interrupt-parent = <&cpuintc>;
82      interrupts = <2>, <3>;
83      interrupt-names = "int0", "int1";
84
85      loongson,parent_int_map = <0xf0ffffff>, /* int0 */
86                                <0x0f000000>, /* int1 */
87                                <0x00000000>, /* int2 */
88                                <0x00000000>; /* int3 */
89
90    };
91
92...
93