ASoC: dt-bindings: mediatek: mt8192: re-add audio afe document

The document was merged as commit 1afc60e00d ("dt-bindings:
mediatek: mt8192: add audio afe document").

However, [1] revealed that the commit 1afc60e00d breaks
dt_binding_check due to dt-bindings/clock/mt8192-clk.h doesn't
exist.

As a temporary fix, commit 7d94ca3c8a ("ASoC: mt8192: revert
add audio afe document") reverted commit 1afc60e00d.

dt-bindings/clock/mt8192-clk.h is in mainline per commit
f35f1a23e0 ("clk: mediatek: Add dt-bindings of MT8192 clocks").
Re-adds the document back.

[1]: https://mailman.alsa-project.org/pipermail/alsa-devel/2020-November/176873.html

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Message-Id: <20211008025523.1852319-1-tzungbi@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml

@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/mt8192-afe-pcm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek AFE PCM controller for mt8192
+
+maintainers:
+  - Jiaxin Yu <jiaxin.yu@mediatek.com>
+  - Shane Chien <shane.chien@mediatek.com>
+
+properties:
+  compatible:
+    const: mediatek,mt8192-audio
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: audiosys
+
+  mediatek,apmixedsys:
+    $ref: "/schemas/types.yaml#/definitions/phandle"
+    description: The phandle of the mediatek apmixedsys controller
+
+  mediatek,infracfg:
+    $ref: "/schemas/types.yaml#/definitions/phandle"
+    description: The phandle of the mediatek infracfg controller
+
+  mediatek,topckgen:
+    $ref: "/schemas/types.yaml#/definitions/phandle"
+    description: The phandle of the mediatek topckgen controller
+
+  power-domains:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: AFE clock
+      - description: ADDA DAC clock
+      - description: ADDA DAC pre-distortion clock
+      - description: audio infra sys clock
+      - description: audio infra 26M clock
+
+  clock-names:
+    items:
+      - const: aud_afe_clk
+      - const: aud_dac_clk
+      - const: aud_dac_predis_clk
+      - const: aud_infra_clk
+      - const: aud_infra_26m_clk
+
+required:
+  - compatible
+  - interrupts
+  - resets
+  - reset-names
+  - mediatek,apmixedsys
+  - mediatek,infracfg
+  - mediatek,topckgen
+  - power-domains
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8192-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/power/mt8192-power.h>
+    #include <dt-bindings/reset-controller/mt8192-resets.h>
+
+    afe: mt8192-afe-pcm {
+        compatible = "mediatek,mt8192-audio";
+        interrupts = <GIC_SPI 202 IRQ_TYPE_LEVEL_HIGH>;
+        resets = <&watchdog MT8192_TOPRGU_AUDIO_SW_RST>;
+        reset-names = "audiosys";
+        mediatek,apmixedsys = <&apmixedsys>;
+        mediatek,infracfg = <&infracfg>;
+        mediatek,topckgen = <&topckgen>;
+        power-domains = <&scpsys MT8192_POWER_DOMAIN_AUDIO>;
+        clocks = <&audsys CLK_AUD_AFE>,
+                 <&audsys CLK_AUD_DAC>,
+                 <&audsys CLK_AUD_DAC_PREDIS>,
+                 <&infracfg CLK_INFRA_AUDIO>,
+                 <&infracfg CLK_INFRA_AUDIO_26M_B>;
+        clock-names = "aud_afe_clk",
+                      "aud_dac_clk",
+                      "aud_dac_predis_clk",
+                      "aud_infra_clk",
+                      "aud_infra_26m_clk";
+    };
+
+...