dt-ndings: mediatek: mt8195: add dsp document

This patch adds document for mt8195 DSP

Signed-off-by: YC Hung <yc.hung@mediatek.com>

Author: yaochunhung

Documentation/devicetree/bindings/dsp/mtk,mt8195-dsp.yaml

@@ -0,0 +1,131 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dsp/mtk,mt8195-dsp.yaml#
+$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-audio_dsp
+
+  reg:
+    maxItems: 5
+
+  reg-names:
+    maxItems: 5
+
+  interrupts:
+    maxItems: 4
+
+  interrupt-names:
+    maxItems: 4
+
+  clocks:
+    items:
+      - description: mux for dsp clock
+      - description: 26M clock
+      - description: mux for audio dsp local bus
+      - description: default audio dsp local bus clock source
+      - description: clock gate for dsp clock
+      - description: mux for dsp access external bus
+
+  clock-names:
+    items:
+      - const: dsp_sel
+      - const: clk26m_ck
+      - const: audio_local_bus
+      - const: mainpll_d7_d2
+      - const: scp_adsp_audiodsp
+      - const: audio_h_sel
+
+  power-domains:
+    maxItems: 1
+
+  mboxes:
+    maxItems: 3
+
+  mbox-names:
+    items:
+      - const: adsp 0
+      - const: adsp 1
+      - const: adsp 2
+
+  "#mbox-cells":
+    const: 1
+    description:
+      The first cell is the client-id, and the second cell is the signal-id.
+
+  sound:
+    maxItems: 3
+
+  memory-region:
+    description:
+      phandle to a node describing reserved memory (System RAM memory)
+      used by DSP (see bindings/reserved-memory/reserved-memory.txt)
+    maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - power-domains
+  - mboxes
+  - mbox-names
+  - memory-region
+  - "#mbox-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    adsp: adsp@10803000 {
+       compatible =  "mediatek,mt8195-audio_dsp";
+       reg = <0x10803000  0x1000>,
+             <0x10840000  0x40000>,
+             <0x10816000  0x1000>,
+             <0x10817000  0x1000>,
+             <0x10818000  0x1000>;
+       reg-names = "cfg", "sram", "mbox0", "mbox1", "mbox2";
+       interrupts = <GIC_SPI 694 IRQ_TYPE_LEVEL_HIGH 0>,
+                    <GIC_SPI 702 IRQ_TYPE_LEVEL_HIGH 0>,
+                    <GIC_SPI 703 IRQ_TYPE_LEVEL_HIGH 0>,
+                    <GIC_SPI 704 IRQ_TYPE_LEVEL_HIGH 0>;
+       interrupt-names = "wdt", "mbox0", "mbox1", "mbox2";
+       clocks = <&topckgen 10>, //CLK_TOP_DSP_SEL
+                <&clk26m>,
+                <&topckgen 107>, //CLK_TOP_AUDIO_LOCAL_BUS_SEL
+                <&topckgen 136>, //CLK_TOP_MAINPLL_D7_D2
+                <&scp_adsp 0>, //CLK_SCP_ADSP_AUDIODSP
+                <&topckgen 34>; //CLK_TOP_AUDIO_H_SEL
+       clock-names = "dsp_sel",
+                     "clk26m_ck",
+                     "audio_local_bus",
+                     "mainpll_d7_d2",
+                     "scp_adsp_audiodsp",
+                     "audio_h_sel";
+       memory-region = <&adsp_dma_mem_reserved>,
+                       <&adsp_mem_reserved>;
+       power-domains = <&spm 6>; //MT8195_POWER_DOMAIN_ADSP
+       #mbox-cells = <1>;
+       mboxes = <&adsp 0>, <&adsp 1>, <&adsp 2>;
+       status = "disabled";
+
+       sound {
+              mediatek,dptx-codec = <&dp_tx>;
+              mediatek,hdmi-codec = <&hdmi0>;
+              mediatek,platform = <&afe>;
+             };
+       };