dt-bindings: mediatek: mt8195: add audio afe document

This patch adds mt8195 audio afe document.

In order to support dynamic clock reparenting for ADDA and ETDM, PLL
and MUX clocks are requested even though they are not consumed by afe
directly.
Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20210819084144.18483-8-trevor.wu@mediatek.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/mt8195-afe-pcm.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/mt8195-afe-pcm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek AFE PCM controller for mt8195
+
+maintainers:
+  - Trevor Wu <trevor.wu@mediatek.com>
+
+properties:
+  compatible:
+    const: mediatek,mt8195-audio
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  mediatek,topckgen:
+    $ref: "/schemas/types.yaml#/definitions/phandle"
+    description: The phandle of the mediatek topckgen controller
+
+  power-domains:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: 26M clock
+      - description: audio pll1 clock
+      - description: audio pll2 clock
+      - description: clock divider for i2si1_mck
+      - description: clock divider for i2si2_mck
+      - description: clock divider for i2so1_mck
+      - description: clock divider for i2so2_mck
+      - description: clock divider for dptx_mck
+      - description: a1sys hoping clock
+      - description: audio intbus clock
+      - description: audio hires clock
+      - description: audio local bus clock
+      - description: mux for dptx_mck
+      - description: mux for i2so1_mck
+      - description: mux for i2so2_mck
+      - description: mux for i2si1_mck
+      - description: mux for i2si2_mck
+      - description: audio infra 26M clock
+      - description: infra bus clock
+
+  clock-names:
+    items:
+      - const: clk26m
+      - const: apll1_ck
+      - const: apll2_ck
+      - const: apll12_div0
+      - const: apll12_div1
+      - const: apll12_div2
+      - const: apll12_div3
+      - const: apll12_div9
+      - const: a1sys_hp_sel
+      - const: aud_intbus_sel
+      - const: audio_h_sel
+      - const: audio_local_bus_sel
+      - const: dptx_m_sel
+      - const: i2so1_m_sel
+      - const: i2so2_m_sel
+      - const: i2si1_m_sel
+      - const: i2si2_m_sel
+      - const: infra_ao_audio_26m_b
+      - const: scp_adsp_audiodsp
+
+  mediatek,etdm-in1-chn-disabled:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    maxItems: 24
+    description: Specify which input channel should be disabled.
+
+  mediatek,etdm-in2-chn-disabled:
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+    maxItems: 16
+    description: Specify which input channel should be disabled.
+
+patternProperties:
+  "^mediatek,etdm-in[1-2]-mclk-always-on-rate-hz$":
+    description: Specify etdm in mclk output rate for always on case.
+
+  "^mediatek,etdm-out[1-3]-mclk-always-on-rate-hz$":
+    description: Specify etdm out mclk output rate for always on case.
+
+  "^mediatek,etdm-in[1-2]-multi-pin-mode$":
+    type: boolean
+    description: if present, the etdm data mode is I2S.
+
+  "^mediatek,etdm-out[1-3]-multi-pin-mode$":
+    type: boolean
+    description: if present, the etdm data mode is I2S.
+
+  "^mediatek,etdm-in[1-2]-cowork-source$":
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      etdm modules can share the same external clock pin. Specify
+      which etdm clock source is required by this etdm in moudule.
+    enum:
+      - 0 # etdm1_in
+      - 1 # etdm2_in
+      - 2 # etdm1_out
+      - 3 # etdm2_out
+
+  "^mediatek,etdm-out[1-2]-cowork-source$":
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      etdm modules can share the same external clock pin. Specify
+      which etdm clock source is required by this etdm out moudule.
+    enum:
+      - 0 # etdm1_in
+      - 1 # etdm2_in
+      - 2 # etdm1_out
+      - 3 # etdm2_out
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - mediatek,topckgen
+  - power-domains
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8195-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/power/mt8195-power.h>
+
+    afe: mt8195-afe-pcm@10890000 {
+        compatible = "mediatek,mt8195-audio";
+        reg = <0x10890000 0x10000>;
+        interrupts = <GIC_SPI 822 IRQ_TYPE_LEVEL_HIGH 0>;
+        mediatek,topckgen = <&topckgen>;
+        power-domains = <&spm MT8195_POWER_DOMAIN_AUDIO>;
+        clocks = <&clk26m>,
+                 <&topckgen CLK_TOP_APLL1>,
+                 <&topckgen CLK_TOP_APLL2>,
+                 <&topckgen CLK_TOP_APLL12_DIV0>,
+                 <&topckgen CLK_TOP_APLL12_DIV1>,
+                 <&topckgen CLK_TOP_APLL12_DIV2>,
+                 <&topckgen CLK_TOP_APLL12_DIV3>,
+                 <&topckgen CLK_TOP_APLL12_DIV9>,
+                 <&topckgen CLK_TOP_A1SYS_HP_SEL>,
+                 <&topckgen CLK_TOP_AUD_INTBUS_SEL>,
+                 <&topckgen CLK_TOP_AUDIO_H_SEL>,
+                 <&topckgen CLK_TOP_AUDIO_LOCAL_BUS_SEL>,
+                 <&topckgen CLK_TOP_DPTX_M_SEL>,
+                 <&topckgen CLK_TOP_I2SO1_M_SEL>,
+                 <&topckgen CLK_TOP_I2SO2_M_SEL>,
+                 <&topckgen CLK_TOP_I2SI1_M_SEL>,
+                 <&topckgen CLK_TOP_I2SI2_M_SEL>,
+                 <&infracfg_ao CLK_INFRA_AO_AUDIO_26M_B>,
+                 <&scp_adsp CLK_SCP_ADSP_AUDIODSP>;
+        clock-names = "clk26m",
+                      "apll1_ck",
+                      "apll2_ck",
+                      "apll12_div0",
+                      "apll12_div1",
+                      "apll12_div2",
+                      "apll12_div3",
+                      "apll12_div9",
+                      "a1sys_hp_sel",
+                      "aud_intbus_sel",
+                      "audio_h_sel",
+                      "audio_local_bus_sel",
+                      "dptx_m_sel",
+                      "i2so1_m_sel",
+                      "i2so2_m_sel",
+                      "i2si1_m_sel",
+                      "i2si2_m_sel",
+                      "infra_ao_audio_26m_b",
+                      "scp_adsp_audiodsp";
+    };
+
+...