linux/Documentation/devicetree/bindings/remoteproc/ti,k3-dsp-rproc.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/remoteproc/ti,k3-dsp-rproc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: TI K3 DSP devices

maintainers:
  - Suman Anna <s-anna@ti.com>

description: |
  The TI K3 family of SoCs usually have one or more TI DSP Core sub-systems
  that are used to offload some of the processor-intensive tasks or algorithms,
  for achieving various system level goals.

  These processor sub-systems usually contain additional sub-modules like
  L1 and/or L2 caches/SRAMs, an Interrupt Controller, an external memory
  controller, a dedicated local power/sleep controller etc. The DSP processor
  cores in the K3 SoCs are usually either a TMS320C66x CorePac processor or a
  TMS320C71x CorePac processor.

  Each DSP Core sub-system is represented as a single DT node. Each node has a
  number of required or optional properties that enable the OS running on the
  host processor (Arm CorePac) to perform the device management of the remote
  processor and to communicate with the remote processor.

properties:
  compatible:
    enum:
      - ti,am62a-c7xv-dsp
      - ti,j721e-c66-dsp
      - ti,j721e-c71-dsp
      - ti,j721s2-c71-dsp
    description:
      Use "ti,am62a-c7xv-dsp" for AM62A Deep learning DSPs on K3 AM62A SoCs
      Use "ti,j721e-c66-dsp" for C66x DSPs on K3 J721E SoCs
      Use "ti,j721e-c71-dsp" for C71x DSPs on K3 J721E SoCs
      Use "ti,j721s2-c71-dsp" for C71x DSPs on K3 J721S2 SoCs

  resets:
    description: |
      Should contain the phandle to the reset controller node managing the
      local resets for this device, and a reset specifier.
    maxItems: 1

  firmware-name:
    description: |
      Should contain the name of the default firmware image
      file located on the firmware search path

  mboxes:
    description: |
      OMAP Mailbox specifier denoting the sub-mailbox, to be used for
      communication with the remote processor. This property should match
      with the sub-mailbox node used in the firmware image.
    maxItems: 1

  memory-region:
    minItems: 2
    maxItems: 8
    description: |
      phandle to the reserved memory nodes to be associated with the remoteproc
      device. There should be at least two reserved memory nodes defined. The
      reserved memory nodes should be carveout nodes, and should be defined as
      per the bindings in
      Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
    items:
      - description: region used for dynamic DMA allocations like vrings and
                     vring buffers
      - description: region reserved for firmware image sections
    additionalItems: true

# Optional properties:
# --------------------

  sram:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    minItems: 1
    maxItems: 4
    items:
      maxItems: 1
    description: |
      phandles to one or more reserved on-chip SRAM regions. The regions
      should be defined as child nodes of the respective SRAM node, and
      should be defined as per the generic bindings in,
      Documentation/devicetree/bindings/sram/sram.yaml

allOf:
  - if:
      properties:
        compatible:
          enum:
            - ti,j721e-c66-dsp
    then:
      properties:
        reg:
          items:
            - description: Address and Size of the L2 SRAM internal memory region
            - description: Address and Size of the L1 PRAM internal memory region
            - description: Address and Size of the L1 DRAM internal memory region
        reg-names:
          items:
            - const: l2sram
            - const: l1pram
            - const: l1dram

  - if:
      properties:
        compatible:
          enum:
            - ti,j721e-c71-dsp
            - ti,j721s2-c71-dsp
    then:
      properties:
        reg:
          items:
            - description: Address and Size of the L2 SRAM internal memory region
            - description: Address and Size of the L1 DRAM internal memory region
        reg-names:
          items:
            - const: l2sram
            - const: l1dram

  - if:
      properties:
        compatible:
          enum:
            - ti,am62a-c7xv-dsp
    then:
      properties:
        reg:
          items:
            - description: Address and Size of the L2 SRAM internal memory region
        reg-names:
          items:
            - const: l2sram

  - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#

required:
  - compatible
  - reg
  - reg-names
  - ti,sci
  - ti,sci-dev-id
  - ti,sci-proc-ids
  - resets
  - firmware-name
  - mboxes
  - memory-region

unevaluatedProperties: false

examples:
  - |
    soc {
        #address-cells = <2>;
        #size-cells = <2>;

        mailbox0_cluster3: mailbox-0 {
            #mbox-cells = <1>;
        };

        mailbox0_cluster4: mailbox-1 {
            #mbox-cells = <1>;
        };

        bus@100000 {
            compatible = "simple-bus";
            #address-cells = <2>;
            #size-cells = <2>;
            ranges = <0x00 0x00100000 0x00 0x00100000 0x00 0x00020000>, /* ctrl mmr */
                     <0x00 0x64800000 0x00 0x64800000 0x00 0x00800000>, /* C71_0 */
                     <0x4d 0x80800000 0x4d 0x80800000 0x00 0x00800000>, /* C66_0 */
                     <0x4d 0x81800000 0x4d 0x81800000 0x00 0x00800000>; /* C66_1 */

            /* J721E C66_0 DSP node */
            dsp@4d80800000 {
                compatible = "ti,j721e-c66-dsp";
                reg = <0x4d 0x80800000 0x00 0x00048000>,
                      <0x4d 0x80e00000 0x00 0x00008000>,
                      <0x4d 0x80f00000 0x00 0x00008000>;
                reg-names = "l2sram", "l1pram", "l1dram";
                ti,sci = <&dmsc>;
                ti,sci-dev-id = <142>;
                ti,sci-proc-ids = <0x03 0xFF>;
                resets = <&k3_reset 142 1>;
                firmware-name = "j7-c66_0-fw";
                memory-region = <&c66_0_dma_memory_region>,
                                <&c66_0_memory_region>;
                mboxes = <&mailbox0_cluster3 &mbox_c66_0>;
            };

            /* J721E C71_0 DSP node */
            c71_0: dsp@64800000 {
                compatible = "ti,j721e-c71-dsp";
                reg = <0x00 0x64800000 0x00 0x00080000>,
                      <0x00 0x64e00000 0x00 0x0000c000>;
                reg-names = "l2sram", "l1dram";
                ti,sci = <&dmsc>;
                ti,sci-dev-id = <15>;
                ti,sci-proc-ids = <0x30 0xFF>;
                resets = <&k3_reset 15 1>;
                firmware-name = "j7-c71_0-fw";
                memory-region = <&c71_0_dma_memory_region>,
                                <&c71_0_memory_region>;
                mboxes = <&mailbox0_cluster4 &mbox_c71_0>;
            };
        };
    };