# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/bus/st,stm32mp131-dbg-bus.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: STM32 Coresight bus

maintainers:
  - Gatien Chevallier <gatien.chevallier@foss.st.com>

description:
  The STM32 debug bus is in charge of checking the debug configuration
  of the platform before probing the peripheral drivers that rely on the debug
  domain.

properties:
  compatible:
    items:
      - enum:
          - st,stm32mp131-dbg-bus
          - st,stm32mp151-dbg-bus
 
  "#address-cells":
    const: 1
 
  "#size-cells":
    const: 1

  ranges:
    minItems: 1
    maxItems: 2
 
  "#access-controller-cells":
    const: 1
    description:
      Contains the debug profile necessary to access the peripheral.

patternProperties:
  "@[0-9a-f]+$":
    description: Debug related peripherals
    type: object

    additionalProperties: true

    required:
      - access-controllers

required:
  - "#access-controller-cells"
  - "#address-cells"
  - "#size-cells"
  - compatible
  - ranges

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/stm32mp1-clks.h>
 
    dbg_bus: bus@50080000 {
      compatible = "st,stm32mp131-dbg-bus";
      #address-cells = <1>;
      #size-cells = <1>;
      #access-controller-cells = <1>;
      ranges = <0x50080000 0x50080000 0x3f80000>;
 
      cti@50094000 {
        compatible = "arm,coresight-cti", "arm,primecell";
        reg = <0x50094000 0x1000>;
        clocks = <&rcc CK_DBG>;
        clock-names = "apb_pclk";
        access-controllers = <&dbg_bus 0>;
      };
    };