xref: /linux/Documentation/devicetree/bindings/interrupt-controller/apple,aic2.yaml (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/interrupt-controller/apple,aic2.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Apple Interrupt Controller 2
8
9maintainers:
10  - Hector Martin <marcan@marcan.st>
11
12description: |
13  The Apple Interrupt Controller 2 is a simple interrupt controller present on
14  Apple ARM SoC platforms starting with t600x (M1 Pro and Max).
15
16  It provides the following features:
17
18  - Level-triggered hardware IRQs wired to SoC blocks
19    - Single mask bit per IRQ
20    - Automatic masking on event delivery (auto-ack)
21    - Software triggering (ORed with hw line)
22  - Automatic prioritization (single event/ack register per CPU, lower IRQs =
23    higher priority)
24  - Automatic masking on ack
25  - Support for multiple dies
26
27  This device also represents the FIQ interrupt sources on platforms using AIC,
28  which do not go through a discrete interrupt controller. It also handles
29  FIQ-based Fast IPIs.
30
31properties:
32  compatible:
33    items:
34      - enum:
35          - apple,t8112-aic
36          - apple,t6000-aic
37      - const: apple,aic2
38
39  interrupt-controller: true
40
41  '#interrupt-cells':
42    minimum: 3
43    maximum: 4
44    description: |
45      The 1st cell contains the interrupt type:
46        - 0: Hardware IRQ
47        - 1: FIQ
48
49      The 2nd cell contains the die ID (only present on apple,t6000-aic).
50
51      The next cell contains the interrupt number.
52        - HW IRQs: interrupt number
53        - FIQs:
54          - 0: physical HV timer
55          - 1: virtual HV timer
56          - 2: physical guest timer
57          - 3: virtual guest timer
58
59      The last cell contains the interrupt flags. This is normally
60      IRQ_TYPE_LEVEL_HIGH (4).
61
62  reg:
63    items:
64      - description: Address and size of the main AIC2 registers.
65      - description: Address and size of the AIC2 Event register.
66
67  reg-names:
68    items:
69      - const: core
70      - const: event
71
72  power-domains:
73    maxItems: 1
74
75  affinities:
76    type: object
77    additionalProperties: false
78    description:
79      FIQ affinity can be expressed as a single "affinities" node,
80      containing a set of sub-nodes, one per FIQ with a non-default
81      affinity.
82    patternProperties:
83      "^.+-affinity$":
84        type: object
85        additionalProperties: false
86        properties:
87          apple,fiq-index:
88            description:
89              The interrupt number specified as a FIQ, and for which
90              the affinity is not the default.
91            $ref: /schemas/types.yaml#/definitions/uint32
92            maximum: 5
93
94          cpus:
95            $ref: /schemas/types.yaml#/definitions/phandle-array
96            description:
97              Should be a list of phandles to CPU nodes (as described in
98              Documentation/devicetree/bindings/arm/cpus.yaml).
99
100        required:
101          - apple,fiq-index
102          - cpus
103
104required:
105  - compatible
106  - '#interrupt-cells'
107  - interrupt-controller
108  - reg
109  - reg-names
110
111additionalProperties: false
112
113allOf:
114  - $ref: /schemas/interrupt-controller.yaml#
115  - if:
116      properties:
117        compatible:
118          contains:
119            const: apple,t8112-aic
120    then:
121      properties:
122        '#interrupt-cells':
123          const: 3
124    else:
125      properties:
126        '#interrupt-cells':
127          const: 4
128
129examples:
130  - |
131    soc {
132        #address-cells = <2>;
133        #size-cells = <2>;
134
135        aic: interrupt-controller@28e100000 {
136            compatible = "apple,t6000-aic", "apple,aic2";
137            #interrupt-cells = <4>;
138            interrupt-controller;
139            reg = <0x2 0x8e100000 0x0 0xc000>,
140                  <0x2 0x8e10c000 0x0 0x4>;
141            reg-names = "core", "event";
142        };
143    };
144