# 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.
  In AST2700 SOC which has two soc connection, each soc have its own scu
  register control, ast2700-scu0 for soc0, ast2700-scu1 for soc1.

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
          - aspeed,ast2700-scu0
          - aspeed,ast2700-scu1
      - const: syscon
      - const: simple-mfd

  reg:
    maxItems: 1

  ranges: true
 
  '#address-cells':
    minimum: 1
    maximum: 2
 
  '#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]+)?$':
    type: object
    additionalProperties: true
    properties:
      compatible:
        contains:
          enum:
            - aspeed,ast2400-pinctrl
            - aspeed,ast2500-pinctrl
            - aspeed,ast2600-pinctrl

    required:
      - compatible
 
  '^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
              - aspeed,ast2700-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>;
        };
    };
...