Documentation/devicetree/bindings/dsp/fsl,dsp.yaml

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

title: NXP i.MX8 DSP core

maintainers:
  - Daniel Baluta <daniel.baluta@nxp.com>
  - Shengjiu Wang <shengjiu.wang@nxp.com>

description: |
  Some boards from i.MX8 family contain a DSP core used for
  advanced pre- and post- audio processing.

properties:
  compatible:
    enum:
      - fsl,imx8qxp-dsp
      - fsl,imx8qm-dsp
      - fsl,imx8mp-dsp
      - fsl,imx8ulp-dsp
      - fsl,imx8qxp-hifi4
      - fsl,imx8qm-hifi4
      - fsl,imx8mp-hifi4
      - fsl,imx8ulp-hifi4

  reg:
    maxItems: 1

  clocks:
    items:
      - description: ipg clock
      - description: ocram clock
      - description: core clock
      - description: debug interface clock
      - description: message unit clock
    minItems: 3

  clock-names:
    items:
      - const: ipg
      - const: ocram
      - const: core
      - const: debug
      - const: mu
    minItems: 3

  power-domains:
    description:
      List of phandle and PM domain specifier as documented in
      Documentation/devicetree/bindings/power/power_domain.txt
    minItems: 1
    maxItems: 4

  mboxes:
    description:
      List of <&phandle type channel> - 2 channels for TXDB, 2 channels for RXDB
      or - 1 channel for TX, 1 channel for RX, 1 channel for RXDB
      (see mailbox/fsl,mu.txt)
    minItems: 3
    maxItems: 4

  mbox-names:
    minItems: 3
    maxItems: 4

  memory-region:
    description:
      phandle to a node describing reserved memory (System RAM memory)
      used by DSP (see bindings/reserved-memory/reserved-memory.txt)
    minItems: 1
    maxItems: 4

  firmware-name:
    description: |
      Default name of the firmware to load to the remote processor.

  fsl,dsp-ctrl:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      Phandle to syscon block which provide access for processor enablement

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - power-domains
  - mboxes
  - mbox-names
  - memory-region

allOf:
  - if:
      properties:
        compatible:
          contains:
            enum:
              - fsl,imx8qxp-dsp
              - fsl,imx8qm-dsp
              - fsl,imx8qxp-hifi4
              - fsl,imx8qm-hifi4
    then:
      properties:
        power-domains:
          minItems: 4
    else:
      properties:
        power-domains:
          maxItems: 1

  - if:
      properties:
        compatible:
          contains:
            enum:
              - fsl,imx8qxp-hifi4
              - fsl,imx8qm-hifi4
              - fsl,imx8mp-hifi4
              - fsl,imx8ulp-hifi4
    then:
      properties:
        memory-region:
          minItems: 4
        mboxes:
          maxItems: 3
        mbox-names:
          items:
            - const: tx
            - const: rx
            - const: rxdb
    else:
      properties:
        memory-region:
          maxItems: 1
        mboxes:
          minItems: 4
        mbox-names:
          items:
            - const: txdb0
            - const: txdb1
            - const: rxdb0
            - const: rxdb1

additionalProperties: false

examples:
  - |
    #include <dt-bindings/firmware/imx/rsrc.h>
    #include <dt-bindings/clock/imx8-clock.h>
    dsp@596e8000 {
        compatible = "fsl,imx8qxp-dsp";
        reg = <0x596e8000 0x88000>;
        clocks = <&adma_lpcg IMX_ADMA_LPCG_DSP_IPG_CLK>,
                 <&adma_lpcg IMX_ADMA_LPCG_OCRAM_IPG_CLK>,
                 <&adma_lpcg IMX_ADMA_LPCG_DSP_CORE_CLK>;
        clock-names = "ipg", "ocram", "core";
        power-domains = <&pd IMX_SC_R_MU_13A>,
                        <&pd IMX_SC_R_MU_13B>,
                        <&pd IMX_SC_R_DSP>,
                        <&pd IMX_SC_R_DSP_RAM>;
        mbox-names = "txdb0", "txdb1", "rxdb0", "rxdb1";
        mboxes = <&lsio_mu13 2 0>, <&lsio_mu13 2 1>, <&lsio_mu13 3 0>, <&lsio_mu13 3 1>;
        memory-region = <&dsp_reserved>;
    };
  - |
    #include <dt-bindings/clock/imx8mp-clock.h>
    dsp_reserved: dsp@92400000 {
      reg = <0x92400000 0x1000000>;
      no-map;
    };
    dsp_vdev0vring0: vdev0vring0@942f0000 {
      reg = <0x942f0000 0x8000>;
      no-map;
    };
    dsp_vdev0vring1: vdev0vring1@942f8000 {
      reg = <0x942f8000 0x8000>;
      no-map;
    };
    dsp_vdev0buffer: vdev0buffer@94300000 {
      compatible = "shared-dma-pool";
      reg = <0x94300000 0x100000>;
      no-map;
    };

    dsp: dsp@3b6e8000 {
      compatible = "fsl,imx8mp-hifi4";
      reg = <0x3b6e8000 0x88000>;
      clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_DSP_ROOT>,
               <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_OCRAMA_IPG>,
               <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_DSP_ROOT>,
               <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_DSPDBG_ROOT>;
      clock-names = "ipg", "ocram", "core", "debug";
      firmware-name = "imx/dsp/hifi4.bin";
      power-domains = <&audiomix_pd>;
      mbox-names = "tx", "rx", "rxdb";
      mboxes = <&mu2 0 0>,
               <&mu2 1 0>,
               <&mu2 3 0>;
      memory-region = <&dsp_vdev0buffer>, <&dsp_vdev0vring0>,
                      <&dsp_vdev0vring1>, <&dsp_reserved>;
      fsl,dsp-ctrl = <&audio_blk_ctrl>;
    };