xref: /linux/Documentation/devicetree/bindings/interrupt-controller/apple,aic2.yaml (revision 59e6295fac26b8e85c1ea859cdd89fa1e47519d7) 
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 and 3
8
9maintainers:
10  - Janne Grunau <j@jannau.net>
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
31  The Apple Interrupt Controller 3 is in its base functionality very similar to
32  the Apple Interrupt Controller 2 and uses the same device tree bindings. It is
33  found on Apple ARM SoCs platforms starting with t8122 (M3).
34
35properties:
36  compatible:
37    oneOf:
38      - items:
39          - enum:
40              - apple,t6000-aic
41              - apple,t6020-aic
42              - apple,t8112-aic
43          - const: apple,aic2
44      - items:
45          - enum:
46              - apple,t6030-aic3
47              - apple,t6031-aic3
48          - const: apple,t8122-aic3
49      - const: apple,t8122-aic3
50
51  interrupt-controller: true
52
53  '#interrupt-cells':
54    minimum: 3
55    maximum: 4
56    description: |
57      The 1st cell contains the interrupt type:
58        - 0: Hardware IRQ
59        - 1: FIQ
60
61      The 2nd cell contains the die ID (only present on apple,t6000-aic).
62
63      The next cell contains the interrupt number.
64        - HW IRQs: interrupt number
65        - FIQs:
66          - 0: physical HV timer
67          - 1: virtual HV timer
68          - 2: physical guest timer
69          - 3: virtual guest timer
70
71      The last cell contains the interrupt flags. This is normally
72      IRQ_TYPE_LEVEL_HIGH (4).
73
74  reg:
75    items:
76      - description: Address and size of the main AIC2 registers.
77      - description: Address and size of the AIC2 Event register.
78
79  reg-names:
80    items:
81      - const: core
82      - const: event
83
84  power-domains:
85    maxItems: 1
86
87  affinities:
88    type: object
89    additionalProperties: false
90    description:
91      FIQ affinity can be expressed as a single "affinities" node,
92      containing a set of sub-nodes, one per FIQ with a non-default
93      affinity.
94    patternProperties:
95      "^.+-affinity$":
96        type: object
97        additionalProperties: false
98        properties:
99          apple,fiq-index:
100            description:
101              The interrupt number specified as a FIQ, and for which
102              the affinity is not the default.
103            $ref: /schemas/types.yaml#/definitions/uint32
104            maximum: 5
105
106          cpus:
107            $ref: /schemas/types.yaml#/definitions/phandle-array
108            description:
109              Should be a list of phandles to CPU nodes (as described in
110              Documentation/devicetree/bindings/arm/cpus.yaml).
111
112        required:
113          - apple,fiq-index
114          - cpus
115
116required:
117  - compatible
118  - '#interrupt-cells'
119  - interrupt-controller
120  - reg
121  - reg-names
122
123additionalProperties: false
124
125allOf:
126  - $ref: /schemas/interrupt-controller.yaml#
127  - if:
128      properties:
129        compatible:
130          contains:
131            enum:
132              - apple,t6000-aic
133              - apple,t6020-aic
134              - apple,t6031-aic3
135    then:
136      properties:
137        '#interrupt-cells':
138          const: 4
139    else:
140      properties:
141        '#interrupt-cells':
142          const: 3
143
144examples:
145  - |
146    soc {
147        #address-cells = <2>;
148        #size-cells = <2>;
149
150        aic: interrupt-controller@28e100000 {
151            compatible = "apple,t6000-aic", "apple,aic2";
152            #interrupt-cells = <4>;
153            interrupt-controller;
154            reg = <0x2 0x8e100000 0x0 0xc000>,
155                  <0x2 0x8e10c000 0x0 0x4>;
156            reg-names = "core", "event";
157        };
158    };
159