regulator: dt-bindings: ti,pbias-omap: Convert to DT schema

Convert Texas Instruments PBIAS internal regulator from text to DT
schema. Since all in tree DT uses SoC specific compatible along with
"ti,pbias-omap" Convert compatible property to require the two-string
form.
Add child regulator nodes as property as they are fixed and node
name is matched by driver.

Signed-off-by: Bhargav Joshi <j.bhargav.u@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260729-ti-pbias-omap-v3-1-20fcc0bdc890@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/pbias-regulator.txt

@@ -1,32 +0,0 @@
-PBIAS internal regulator for SD card dual voltage i/o pads on OMAP SoCs.
-
-Required properties:
-- compatible:
-  - should be "ti,pbias-dra7" for DRA7
-  - should be "ti,pbias-omap2" for OMAP2
-  - should be "ti,pbias-omap3" for OMAP3
-  - should be "ti,pbias-omap4" for OMAP4
-  - should be "ti,pbias-omap5" for OMAP5
-  - "ti,pbias-omap" is deprecated
-- reg: pbias register offset from syscon base and size of pbias register.
-- syscon : phandle of the system control module
-- regulator-name : should be
-			pbias_mmc_omap2430 for OMAP2430, OMAP3 SoCs
-			pbias_sim_omap3 for OMAP3 SoCs
-			pbias_mmc_omap4 for OMAP4 SoCs
-			pbias_mmc_omap5 for OMAP5 and DRA7 SoC
-
-Optional properties:
-- Any optional property defined in bindings/regulator/regulator.txt
-
-Example:
-
-		pbias_regulator: pbias_regulator {
-			compatible = "ti,pbias-omap";
-			reg = <0 0x4>;
-			syscon = <&omap5_padconf_global>;
-			pbias_mmc_reg: pbias_mmc_omap5 {
-				regulator-name = "pbias_mmc_omap5";
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <3000000>;
-			};

Documentation/devicetree/bindings/regulator/ti,pbias-omap.yaml

@@ -0,0 +1,137 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/ti,pbias-omap.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments PBIAS internal regulator
+
+maintainers:
+  - Tony Lindgren <tony@atomide.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - ti,pbias-dra7
+          - ti,pbias-omap2
+          - ti,pbias-omap3
+          - ti,pbias-omap4
+          - ti,pbias-omap5
+      - const: ti,pbias-omap
+
+  reg:
+    maxItems: 1
+
+  syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle of the system control module
+
+  pbias_mmc_omap2430:
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+    required:
+      - regulator-name
+
+  pbias_sim_omap3:
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+    required:
+      - regulator-name
+
+  pbias_mmc_omap4:
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+    required:
+      - regulator-name
+
+  pbias_mmc_omap5:
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+    required:
+      - regulator-name
+
+required:
+  - compatible
+  - reg
+  - syscon
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,pbias-omap2
+    then:
+      required:
+        - pbias_mmc_omap2430
+      properties:
+        pbias_sim_omap3: false
+        pbias_mmc_omap4: false
+        pbias_mmc_omap5: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,pbias-omap3
+    then:
+      anyOf:
+        - required:
+            - pbias_mmc_omap2430
+        - required:
+            - pbias_sim_omap3
+      properties:
+        pbias_mmc_omap4: false
+        pbias_mmc_omap5: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,pbias-omap4
+    then:
+      required:
+        - pbias_mmc_omap4
+      properties:
+        pbias_mmc_omap2430: false
+        pbias_sim_omap3: false
+        pbias_mmc_omap5: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,pbias-omap5
+              - ti,pbias-dra7
+    then:
+      required:
+        - pbias_mmc_omap5
+      properties:
+        pbias_mmc_omap2430: false
+        pbias_sim_omap3: false
+        pbias_mmc_omap4: false
+
+additionalProperties: false
+
+examples:
+  - |
+    pbias_regulator@0 {
+        compatible = "ti,pbias-omap5", "ti,pbias-omap";
+        reg = <0 0x4>;
+        syscon = <&omap5_padconf_global>;
+        pbias_mmc_omap5 {
+            regulator-name = "pbias_mmc_omap5";
+            regulator-min-microvolt = <1800000>;
+            regulator-max-microvolt = <3000000>;
+        };
+    };