apple,aic2.yaml

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    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       - 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 
   72 required:
   73   - compatible
   74   - '#interrupt-cells'
   75   - interrupt-controller
   76   - reg
   77   - reg-names
   78 
   79 additionalProperties: false
   80 
   81 allOf:
   82   - $ref: /schemas/interrupt-controller.yaml#
   83 
   84 examples:
   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     };

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