# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/aspeed,ast2x00-scu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Aspeed System Control Unit

description:
  The Aspeed System Control Unit manages the global behaviour of the SoC,
  configuring elements such as clocks, pinmux, and reset.

maintainers:
  - Joel Stanley <joel@jms.id.au>
  - Andrew Jeffery <andrew@aj.id.au>

properties:
  compatible:
    items:
      - enum:
          - aspeed,ast2400-scu
          - aspeed,ast2500-scu
          - aspeed,ast2600-scu
      - const: syscon
      - const: simple-mfd

  reg:
    maxItems: 1

  ranges: true
 
  '#address-cells':
    const: 1
 
  '#size-cells':
    const: 1
 
  '#clock-cells':
    const: 1
 
  '#reset-cells':
    const: 1

patternProperties:
  '^p2a-control@[0-9a-f]+$':
    description: See Documentation/devicetree/bindings/misc/aspeed-p2a-ctrl.txt
    type: object
 
  '^pinctrl(@[0-9a-f]+)?$':
    oneOf:
      - $ref: /schemas/pinctrl/aspeed,ast2400-pinctrl.yaml
      - $ref: /schemas/pinctrl/aspeed,ast2500-pinctrl.yaml
      - $ref: /schemas/pinctrl/aspeed,ast2600-pinctrl.yaml
 
  '^interrupt-controller@[0-9a-f]+$':
    description: See Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
    type: object
 
  '^silicon-id@[0-9a-f]+$':
    description: Unique hardware silicon identifiers within the SoC
    type: object
    additionalProperties: false

    properties:
      compatible:
        items:
          - enum:
              - aspeed,ast2400-silicon-id
              - aspeed,ast2500-silicon-id
              - aspeed,ast2600-silicon-id
          - const: aspeed,silicon-id

      reg:
        description:
          The reg should be the unique silicon id register, and not backwards
          compatible one in eg. the 2600.
        minItems: 1
        items:
          - description: silicon id information registers
          - description: unique chip id registers

required:
  - compatible
  - reg
  - ranges
  - '#address-cells'
  - '#size-cells'
  - '#clock-cells'
  - '#reset-cells'

additionalProperties: false

examples:
  - |
    syscon@1e6e2000 {
        compatible = "aspeed,ast2400-scu", "syscon", "simple-mfd";
        reg = <0x1e6e2000 0x1a8>;
        #clock-cells = <1>;
        #reset-cells = <1>;
 
        #address-cells = <1>;
        #size-cells = <1>;
        ranges = <0x0 0x1e6e2000 0x1000>;
 
        silicon-id@7c {
            compatible = "aspeed,ast2500-silicon-id", "aspeed,silicon-id";
            reg = <0x7c 0x4>, <0x150 0x8>;
        };
    };
...