Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra20-ictlr.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/interrupt-controller/nvidia,tegra20-ictlr.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra20 Legacy Interrupt Controller

maintainers:
  - Thierry Reding <treding@nvidia.com>
  - Jonathan Hunter <jonathanh@nvidia.com>

description: >
  All Tegra SoCs contain a legacy interrupt controller that routes interrupts to
  the GIC, and also serves as a wakeup source. It is also referred to as
  "ictlr", hence the name of the binding.

  The HW block exposes a number of interrupt controllers, each implementing a
  set of 32 interrupts.

  Notes:
    - Because this HW ultimately routes interrupts to the GIC, the
      interrupt specifier must be that of the GIC.
    - Only SPIs can use the ictlr as an interrupt parent. SGIs and PPIs
      are explicitly forbidden.

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - nvidia,tegra114-ictlr
              - nvidia,tegra124-ictlr
          - const: nvidia,tegra30-ictlr
      - enum:
          - nvidia,tegra20-ictlr
          - nvidia,tegra30-ictlr

  reg:
    description: Each entry is a block of 32 interrupts
    minItems: 4
    maxItems: 5

  interrupt-controller: true

  '#interrupt-cells':
    const: 3

required:
  - compatible
  - reg
  - interrupt-controller
  - '#interrupt-cells'

additionalProperties: false

allOf:
  - if:
      properties:
        compatible:
          contains:
            const: nvidia,tegra20-ictlr
    then:
      properties:
        reg:
          maxItems: 4
    else:
      properties:
        reg:
          minItems: 5

examples:
  - |
    interrupt-controller@60004000 {
        compatible = "nvidia,tegra20-ictlr";
        reg = <0x60004000 64>,
              <0x60004100 64>,
              <0x60004200 64>,
              <0x60004300 64>;
        interrupt-controller;
        #interrupt-cells = <3>;
    };