dt-bindings: regulator: Add mps,mpq7932 power-management IC

Document mpq7932 power-management IC
Signed-off-by: Saravanan Sekar <saravanan@linumiz.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221207173716.123223-3-saravanan@linumiz.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/regulator/mps,mpq7932.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/mps,mpq7932.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Monolithic Power System MPQ7932 PMIC
+
+maintainers:
+  - Saravanan Sekar <saravanan@linumiz.com>
+
+properties:
+  compatible:
+    enum:
+      - mps,mpq7932
+
+  reg:
+    maxItems: 1
+
+  regulators:
+    type: object
+    description: |
+      list of regulators provided by this controller, must be named
+      after their hardware counterparts BUCK[1-6]
+
+    patternProperties:
+      "^buck[1-6]$":
+        type: object
+        $ref: regulator.yaml#
+        unevaluatedProperties: false
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pmic@3 {
+            compatible = "mps,mpq7932";
+            reg = <0x3>;
+
+            regulators {
+                buck1 {
+                    regulator-name = "buck1";
+                    regulator-min-microvolt = <1600000>;
+                    regulator-max-microvolt = <1800000>;
+                    regulator-boot-on;
+                };
+
+                buck2 {
+                    regulator-name = "buck2";
+                    regulator-min-microvolt = <1700000>;
+                    regulator-max-microvolt = <1800000>;
+                    regulator-boot-on;
+                };
+            };
+        };
+    };
+...