Bindings/interrupt-controller/apple,aic2.yaml

   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
   7 title: Apple Interrupt Controller 2
   8
   9 maintainers:
  10   - Hector Martin <marcan@marcan.st>
  11
  12 description: |
  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 properties:
  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
 104 required:
 105   - compatible
 106   - '#interrupt-cells'
 107   - interrupt-controller
 108   - reg
 109   - reg-names
 110
 111 additionalProperties: false
 112
 113 allOf:
 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
 129 examples:
 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     };