xref: /freebsd/sys/contrib/device-tree/Bindings/interrupt-controller/apple,aic2.yaml (revision ebacd8013fe5f7fdf9f6a5b286f6680dd2891036) 
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      - const: apple,t6000-aic
35      - const: apple,aic2
36
37  interrupt-controller: true
38
39  '#interrupt-cells':
40    const: 4
41    description: |
42      The 1st cell contains the interrupt type:
43        - 0: Hardware IRQ
44        - 1: FIQ
45
46      The 2nd cell contains the die ID.
47
48      The next cell contains the interrupt number.
49        - HW IRQs: interrupt number
50        - FIQs:
51          - 0: physical HV timer
52          - 1: virtual HV timer
53          - 2: physical guest timer
54          - 3: virtual guest timer
55
56      The last cell contains the interrupt flags. This is normally
57      IRQ_TYPE_LEVEL_HIGH (4).
58
59  reg:
60    items:
61      - description: Address and size of the main AIC2 registers.
62      - description: Address and size of the AIC2 Event register.
63
64  reg-names:
65    items:
66      - const: core
67      - const: event
68
69  power-domains:
70    maxItems: 1
71
72required:
73  - compatible
74  - '#interrupt-cells'
75  - interrupt-controller
76  - reg
77  - reg-names
78
79additionalProperties: false
80
81allOf:
82  - $ref: /schemas/interrupt-controller.yaml#
83
84examples:
85  - |
86    soc {
87        #address-cells = <2>;
88        #size-cells = <2>;
89
90        aic: interrupt-controller@28e100000 {
91            compatible = "apple,t6000-aic", "apple,aic2";
92            #interrupt-cells = <4>;
93            interrupt-controller;
94            reg = <0x2 0x8e100000 0x0 0xc000>,
95                  <0x2 0x8e10c000 0x0 0x4>;
96            reg-names = "core", "event";
97        };
98    };
99