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
7 title: Loongson Local I/O Interrupt Controller
8
9 maintainers:
10 - Jiaxun Yang <jiaxun.yang@flygoat.com>
11
12 description: |
13 This interrupt controller is found in the Loongson-3 family of chips and
14 Loongson-2K series chips, as the primary package interrupt controller which
15 can route local I/O interrupt to interrupt lines of cores.
16 Be aware of the following points.
17 1.The Loongson-2K0500 is a single core CPU;
18 2.The Loongson-2K0500/2K1000 has 64 device interrupt sources as inputs, so we
19 need to define two nodes in dts{i} to describe the "0-31" and "32-61" interrupt
20 sources respectively.
21
22 allOf:
23 - $ref: /schemas/interrupt-controller.yaml#
24
25 properties:
26 compatible:
27 enum:
28 - loongson,liointc-1.0
29 - loongson,liointc-1.0a
30 - loongson,liointc-2.0
31
32 reg:
33 minItems: 1
34 maxItems: 3
35
36 reg-names:
37 items:
38 - const: main
39 - const: isr0
40 - const: isr1
41 minItems: 2
42
43 interrupt-controller: true
44
45 interrupts:
46 description:
47 Interrupt source of the CPU interrupts.
48 minItems: 1
49 maxItems: 4
50
51 interrupt-names:
52 description: List of names for the parent interrupts.
53 items:
54 pattern: int[0-3]
55 minItems: 1
56 maxItems: 4
57
58 '#interrupt-cells':
59 const: 2
60
61 loongson,parent_int_map:
62 description: |
63 This property points how the children interrupts will be mapped into CPU
64 interrupt lines. Each cell refers to a parent interrupt line from 0 to 3
65 and each bit in the cell refers to a child interrupt from 0 to 31.
66 If a CPU interrupt line didn't connect with liointc, then keep its
67 cell with zero.
68 $ref: /schemas/types.yaml#/definitions/uint32-array
69 minItems: 4
70 maxItems: 4
71
72 required:
73 - compatible
74 - reg
75 - interrupts
76 - interrupt-names
77 - interrupt-controller
78 - '#interrupt-cells'
79 - loongson,parent_int_map
80
81
82 unevaluatedProperties: false
83
84 if:
85 properties:
86 compatible:
87 contains:
88 enum:
89 - loongson,liointc-2.0
90
91 then:
92 properties:
93 reg:
94 minItems: 2
95 maxItems: 3
96
97 required:
98 - reg-names
99
100 else:
101 properties:
102 reg:
103 maxItems: 1
104
105 examples:
106 - |
107 iointc: interrupt-controller@3ff01400 {
108 compatible = "loongson,liointc-1.0";
109 reg = <0x3ff01400 0x64>;
110
111 interrupt-controller;
112 #interrupt-cells = <2>;
113
114 interrupt-parent = <&cpuintc>;
115 interrupts = <2>, <3>;
116 interrupt-names = "int0", "int1";
117
118 loongson,parent_int_map = <0xf0ffffff>, /* int0 */
119 <0x0f000000>, /* int1 */
120 <0x00000000>, /* int2 */
121 <0x00000000>; /* int3 */
122
123 };
124
125 ...
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