ASoC: dt-bindings: ti,twl4030-audio: convert to DT schema

Convert the TWL4030 audio module bindings from txt to YAML format and
move them to the sound subsystem bindings directory. This patch also
refines the schema by adding an enum constraint for ti,enable-vibra and
updates the example to remove irrelevant I2C clock-frequency property.

Signed-off-by: Jihed Chaibi <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/mfd/twl4030-audio.txt

···
-Texas Instruments TWL family (twl4030) audio module
-
-The audio module inside the TWL family consist of an audio codec and a vibra
-driver.
-
-Required properties:
-- compatible : must be "ti,twl4030-audio"
-
-Optional properties, nodes:
-
-Audio functionality:
-- codec { }: Need to be present if the audio functionality is used. Within this
-	     section the following options can be used:
-- ti,digimic_delay: Delay need after enabling the digimic to reduce artifacts
-		    from the start of the recorded sample (in ms)
--ti,ramp_delay_value: HS ramp delay configuration to reduce pop noise
--ti,hs_extmute: Use external mute for HS pop reduction
--ti,hs_extmute_gpio: Use external GPIO to control the external mute
--ti,offset_cncl_path: Offset cancellation path selection, refer to TRM for the
-		      valid values.
-
-Vibra functionality
-- ti,enable-vibra: Need to be set to <1> if the vibra functionality is used. if
-		   missing or it is 0, the vibra functionality is disabled.
-
-Example:
-&i2c1 {
-	clock-frequency = <2600000>;
-
-	twl: twl@48 {
-		reg = <0x48>;
-		interrupts = <7>; /* SYS_NIRQ cascaded to intc */
-		interrupt-parent = <&intc>;
-
-		twl_audio: audio {
-			compatible = "ti,twl4030-audio";
-
-			ti,enable-vibra = <1>;
-
-			codec {
-				ti,ramp_delay_value = <3>;
-			};
-
-		};
-	};
-};

Documentation/devicetree/bindings/sound/ti,twl4030-audio.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/ti,twl4030-audio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TWL4030-family Audio Module
+
+maintainers:
+  - Peter Ujfalusi <[e-mail]>
+
+description:
+  The audio module within the TWL4030-family of companion chips consists
+  of an audio codec and a vibra driver. This binding describes the parent
+  node for these functions.
+
+properties:
+  compatible:
+    const: ti,twl4030-audio
+
+  codec:
+    type: object
+    description: Node containing properties for the audio codec functionality.
+
+    properties:
+      ti,digimic_delay:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Delay in milliseconds after enabling digital microphones to reduce
+          artifacts.
+
+      ti,ramp_delay_value:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Headset ramp delay configuration to reduce pop noise.
+
+      ti,hs_extmute:
+        type: boolean
+        description:
+          Enable the use of an external mute for headset pop reduction.
+
+      ti,hs_extmute_gpio:
+        $ref: /schemas/types.yaml#/definitions/phandle-array
+        description:
+          The GPIO specifier for the external mute control.
+        maxItems: 1
+
+      ti,offset_cncl_path:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description:
+          Offset cancellation path selection. Refer to the Technical
+          Reference Manual for valid values.
+
+  # The 'codec' node itself is optional, but if it exists, it can be empty.
+  # We don't require any of its sub-properties.
+
+  ti,enable-vibra:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    description:
+      Enable or disable the vibra functionality.
+
+additionalProperties: false
+
+required:
+  - compatible
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      twl: twl@48 {
+        reg = <0x48>;
+        interrupts = <7>; /* SYS_NIRQ cascaded to intc */
+        interrupt-parent = <&intc>;
+
+        twl_audio: audio {
+          compatible = "ti,twl4030-audio";
+
+          ti,enable-vibra = <1>;
+
+          codec {
+            ti,ramp_delay_value = <3>;
+          };
+
+        };
+      };
+    };