xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/sram/qcom,ocmem.yaml

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sram/qcom,ocmem.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: On Chip Memory (OCMEM) that is present on some Qualcomm Snapdragon SoCs.

maintainers:
  - Brian Masney <masneyb@onstation.org>

description: |
  The On Chip Memory (OCMEM) is typically used by the GPU, camera/video, and
  audio components on some Snapdragon SoCs.

properties:
  compatible:
    enum:
      - qcom,msm8226-ocmem  # v1.1.0
      - qcom,msm8974-ocmem  # v1.4.0

  reg:
    items:
      - description: Control registers
      - description: OCMEM address range

  reg-names:
    items:
      - const: ctrl
      - const: mem

  clocks:
    minItems: 1
    items:
      - description: Core clock
      - description: Interface clock

  clock-names:
    minItems: 1
    items:
      - const: core
      - const: iface

  '#address-cells':
    const: 1

  '#size-cells':
    const: 1

  ranges:
    maxItems: 1

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

additionalProperties: false

allOf:
  - if:
      properties:
        compatible:
          contains:
            enum:
              - qcom,msm8974-ocmem
    then:
      properties:
        clocks:
          minItems: 2
        clock-names:
          minItems: 2
    else:
      properties:
        clocks:
          minItems: 1
        clock-names:
          minItems: 1

patternProperties:
  "-sram@[0-9a-f]+$":
    type: object
    additionalProperties: false
    description: A region of reserved memory.

    properties:
      reg:
        maxItems: 1

    required:
      - reg

examples:
  - |
    #include <dt-bindings/clock/qcom,rpmcc.h>
    #include <dt-bindings/clock/qcom,mmcc-msm8974.h>

    sram@fdd00000 {
        compatible = "qcom,msm8974-ocmem";

        reg = <0xfdd00000 0x2000>,
              <0xfec00000 0x180000>;
        reg-names = "ctrl",
                    "mem";

        clocks = <&rpmcc RPM_SMD_OCMEMGX_CLK>,
                 <&mmcc OCMEMCX_OCMEMNOC_CLK>;
        clock-names = "core",
                      "iface";

        #address-cells = <1>;
        #size-cells = <1>;
        ranges = <0 0xfec00000 0x100000>;

        gmu-sram@0 {
            reg = <0x0 0x100000>;
        };
    };