xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/remoteproc/qcom,smd-edge.yaml

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

title: Qualcomm SMD Edge communication channel nodes

maintainers:
  - Bjorn Andersson <bjorn.andersson@linaro.org>

description:
  Qualcomm SMD subnode represents a remote subsystem or a remote processor of
  some sort - or in SMD language an "edge". The name of the edges are not
  important.

  In turn, subnodes of the "edges" represent devices tied to SMD channels on
  that "edge". The names of the devices are not important. The properties of
  these nodes are defined by the individual bindings for the SMD devices.
  See also Documentation/devicetree/bindings/soc/qcom/qcom,smd.yaml

properties:
  $nodename:
    const: smd-edge

  apr:
    $ref: /schemas/soc/qcom/qcom,apr.yaml#
    required:
      - qcom,smd-channels
    description:
      Qualcomm APR/GPR (Asynchronous/Generic Packet Router)

  fastrpc:
    $ref: /schemas/misc/qcom,fastrpc.yaml#
    required:
      - qcom,smd-channels
    description:
      Qualcomm FastRPC

  interrupts:
    maxItems: 1

  label:
    description:
      Name of the edge, used for debugging and identification purposes. The
      node name will be used if this is not present.

  mboxes:
    maxItems: 1
    description:
      Reference to the mailbox representing the outgoing doorbell in APCS for
      this client.

  qcom,ipc:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    items:
      - items:
          - description: phandle to a syscon node representing the APCS registers
          - description: u32 representing offset to the register within the syscon
          - description: u32 representing the ipc bit within the register
    description:
      Three entries specifying the outgoing ipc bit used for signaling the
      remote processor.

  qcom,smd-edge:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      The identifier of the remote processor in the smd channel allocation
      table.

  qcom,remote-pid:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      The identifier for the remote processor as known by the rest of the
      system.

  rpm-requests:
    $ref: /schemas/soc/qcom/qcom,smd-rpm.yaml#
    required:
      - qcom,smd-channels
    description:
      Qualcomm Resource Power Manager (RPM) over SMD.

  wcnss:
    $ref: /schemas/soc/qcom/qcom,wcnss.yaml
    required:
      - qcom,smd-channels
    description:
      Qualcomm WCNSS for Bluetooth, WiFi and FM radio.

required:
  - interrupts
  - qcom,smd-edge

oneOf:
  - required:
      - mboxes
  - required:
      - qcom,ipc

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/mailbox/qcom-ipcc.h>

    remoteproc {
        // ...

        smd-edge {
            interrupts = <GIC_SPI 156 IRQ_TYPE_EDGE_RISING>;

            qcom,ipc = <&apcs 8 8>;
            qcom,smd-edge = <1>;
        };
    };