[PATCH v4 2/2] ASoC: dt-bindings: omap-twl4030: convert to DT schema

[Jihed Chaibi <jihed.chaibi.dev@gmail.com>]

Convert the legacy TXT binding for the OMAP TWL4030 sound card
to the modern YAML DT schema format. This adds formal validation
and improves documentation.

Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jihed Chaibi <jihed.chaibi.dev@gmail.com>

---
Changes in v4:
 - Deleted redundant pins list.
 - Split from larger series per maintainer feedback.
 - v3 link:
   https://lore.kernel.org/all/20250816021523.167049-1-jihed.chaibi.dev@gmail.com/

Changes in v3:
 - No change to binding content, only updating commit message format.

Changes in v2:
 - Fixed comment formatting (added spaces for better alignment).
 - Updated commit subject to align with subsystem style.
 - Retained Acked-by from v1 as changes are cosmetic.
---
 .../bindings/sound/omap-twl4030.txt           | 62 ------------
 .../bindings/sound/ti,omap-twl4030.yaml       | 98 +++++++++++++++++++
 2 files changed, 98 insertions(+), 62 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/sound/omap-twl4030.txt
 create mode 100644 Documentation/devicetree/bindings/sound/ti,omap-twl4030.yaml

diff --git a/Documentation/devicetree/bindings/sound/omap-twl4030.txt b/Documentation/devicetree/bindings/sound/omap-twl4030.txt
deleted file mode 100644
index f6a715e4e..000000000
--- a/Documentation/devicetree/bindings/sound/omap-twl4030.txt
+++ /dev/null
@@ -1,62 +0,0 @@
-* Texas Instruments SoC with twl4030 based audio setups
-
-Required properties:
-- compatible: "ti,omap-twl4030"
-- ti,model: Name of the sound card (for example "omap3beagle")
-- ti,mcbsp: phandle for the McBSP node
-
-Optional properties:
-- ti,codec: phandle for the twl4030 audio node
-- ti,mcbsp-voice: phandle for the McBSP node connected to the voice port of twl
-- ti, jack-det-gpio: Jack detect GPIO
-- ti,audio-routing: List of connections between audio components.
-  Each entry is a pair of strings, the first being the connection's sink,
-  the second being the connection's source.
-  If the routing is not provided all possible connection will be available
-
-Available audio endpoints for the audio-routing table:
-
-Board connectors:
- * Headset Stereophone
- * Earpiece Spk
- * Handsfree Spk
- * Ext Spk
- * Main Mic
- * Sub Mic
- * Headset Mic
- * Carkit Mic
- * Digital0 Mic
- * Digital1 Mic
- * Line In
-
-twl4030 pins:
- * HSOL
- * HSOR
- * EARPIECE
- * HFL
- * HFR
- * PREDRIVEL
- * PREDRIVER
- * CARKITL
- * CARKITR
- * MAINMIC
- * SUBMIC
- * HSMIC
- * DIGIMIC0
- * DIGIMIC1
- * CARKITMIC
- * AUXL
- * AUXR
-
- * Headset Mic Bias
- * Mic Bias 1 /* Used for Main Mic or Digimic0 */
- * Mic Bias 2 /* Used for Sub Mic or Digimic1 */
-
-Example:
-
-sound {
-	compatible = "ti,omap-twl4030";
-	ti,model = "omap3beagle";
-
-	ti,mcbsp = <&mcbsp2>;
-};
diff --git a/Documentation/devicetree/bindings/sound/ti,omap-twl4030.yaml b/Documentation/devicetree/bindings/sound/ti,omap-twl4030.yaml
new file mode 100644
index 000000000..27c7019bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/ti,omap-twl4030.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/ti,omap-twl4030.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments SoC with twl4030 based audio setups
+
+maintainers:
+  - Peter Ujfalusi <peter.ujfalusi@gmail.com>
+
+description:
+  Audio setups on TI OMAP SoCs using TWL4030-family
+  audio codec connected via a McBSP port.
+
+properties:
+  compatible:
+    const: ti,omap-twl4030
+
+  ti,model:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: Name of the sound card (for example "omap3beagle").
+
+  ti,mcbsp:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle for the McBSP node.
+
+  ti,codec:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle for the twl4030 audio node.
+
+  ti,mcbsp-voice:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to the McBSP node connected to the voice port.
+
+  ti,jack-det-gpio:
+    description: GPIO specifier for jack detection.
+    maxItems: 1
+
+  ti,audio-routing:
+    description: |
+      A list of audio routing connections. Each entry is a pair of strings,
+      with the first being the connection's sink and the second being the
+      source. If not provided, all possible connections are available.
+
+    $ref: /schemas/types.yaml#/definitions/non-unique-string-array
+    items:
+      enum:
+        # Board Connectors
+        - Headset Stereophone
+        - Earpiece Spk
+        - Handsfree Spk
+        - Ext Spk
+        - Main Mic
+        - Sub Mic
+        - Headset Mic
+        - Carkit Mic
+        - Digital0 Mic
+        - Digital1 Mic
+        - Line In
+
+        # CODEC Pins
+        - HSOL
+        - HSOR
+        - EARPIECE
+        - HFL
+        - HFR
+        - PREDRIVEL
+        - PREDRIVER
+        - CARKITL
+        - CARKITR
+        - MAINMIC
+        - SUBMIC
+        - HSMIC
+        - DIGIMIC0
+        - DIGIMIC1
+        - CARKITMIC
+        - AUXL
+        - AUXR
+
+        # Headset Mic Bias
+        - Mic Bias 1   # Used for Main Mic or Digimic0
+        - Mic Bias 2   # Used for Sub Mic or Digimic1
+
+required:
+  - compatible
+  - ti,model
+  - ti,mcbsp
+
+additionalProperties: false
+
+examples:
+  - |
+    sound {
+        compatible = "ti,omap-twl4030";
+        ti,model = "omap3beagle";
+        ti,mcbsp = <&mcbsp2>;
+    };
-- 
2.39.5