ASoC: dsp: mediatek: add mt8195 dsp document

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/dsp/mediatek,mt8195-dsp.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Mediatek mt8195 DSP core

maintainers:

  - YC Hung <yc.hung@mediatek.com>

description: |

  Some boards from mt8195 contain a DSP core used for

  advanced pre- and post- audio processing.

properties:

  compatible:

    const: mediatek,mt8195-dsp

  reg:

    items:

      - description: Address and size of the DSP Cfg registers

      - description: Address and size of the DSP SRAM

  reg-names:

    items:

      - const: cfg

      - const: sram

  clocks:

    items:

      - description: mux for audio dsp clock

      - description: 26M clock

      - description: mux for audio dsp local bus

      - description: default audio dsp local bus clock source

      - description: clock gate for audio dsp clock

      - description: mux for audio dsp access external bus

  clock-names:

    items:

      - const: adsp_sel

      - const: clk26m_ck

      - const: audio_local_bus

      - const: mainpll_d7_d2

      - const: scp_adsp_audiodsp

      - const: audio_h

  power-domains:

    maxItems: 1

  mboxes:

    items:

      - description: ipc reply between host and audio DSP.

      - description: ipc request between host and audio DSP.

  mbox-names:

    items:

      - const: mbox0

      - const: mbox1

  memory-region:

    items:

      - description: dma buffer between host and DSP.

      - description: DSP system memory.

required:

  - compatible

  - reg

  - reg-names

  - clocks

  - clock-names

  - memory-region

  - power-domains

  - mbox-names

  - mboxes

additionalProperties: false

examples:

  - |

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    #include <dt-bindings/interrupt-controller/irq.h>

    dsp@10803000 {

       compatible =  "mediatek,mt8195-dsp";

       reg = <0x10803000  0x1000>,

             <0x10840000  0x40000>;

       reg-names = "cfg", "sram";

       clocks = <&topckgen 10>, //CLK_TOP_ADSP

                <&clk26m>,

                <&topckgen 107>, //CLK_TOP_AUDIO_LOCAL_BUS

                <&topckgen 136>, //CLK_TOP_MAINPLL_D7_D2

                <&scp_adsp 0>, //CLK_SCP_ADSP_AUDIODSP

                <&topckgen 34>; //CLK_TOP_AUDIO_H

       clock-names = "adsp_sel",

                     "clk26m_ck",

                     "audio_local_bus",

                     "mainpll_d7_d2",

                     "scp_adsp_audiodsp",

                     "audio_h";

       memory-region = <&adsp_dma_mem_reserved>,

                       <&adsp_mem_reserved>;

       power-domains = <&spm 6>; //MT8195_POWER_DOMAIN_ADSP

       mbox-names = "mbox0", "mbox1";

       mboxes = <&adsp_mailbox0>, <&adsp_mailbox1>;

    };