dt-bindings: regulator: document max77838 pmic

The max77838 is a pmic, containing a BUCK regulator and 4 LDOs. It's
primarily used in the Samsung Galaxy S7 lineup and is accessed over I2C.
Document it.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Igor Belwon <igor.belwon@mentallysanemainliners.org>
Link: https://patch.msgid.link/20250914130230.2622030-2-ivo.ivanov.ivanov1@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/maxim,max77838.yaml

@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/maxim,max77838.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated MAX77838 PMIC
+
+maintainers:
+  - Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
+
+properties:
+  $nodename:
+    pattern: "pmic@[0-9a-f]{1,2}"
+  compatible:
+    enum:
+      - maxim,max77838
+
+  reg:
+    maxItems: 1
+
+  regulators:
+    type: object
+    $ref: regulator.yaml#
+    description: |
+      list of regulators provided by this controller, must be named
+      after their hardware counterparts ldo[1-4] and buck
+
+    properties:
+      buck:
+        type: object
+        $ref: regulator.yaml#
+        unevaluatedProperties: false
+
+    patternProperties:
+      "^ldo([1-4])$":
+        type: object
+        $ref: regulator.yaml#
+        unevaluatedProperties: false
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pmic@60 {
+            compatible = "maxim,max77838";
+            reg = <0x60>;
+
+            regulators {
+                ldo2 {
+                    regulator-min-microvolt = <1800000>;
+                    regulator-max-microvolt = <1800000>;
+                };
+            };
+       };
+     };
+...

MAINTAINERS

@@ -15069,6 +15069,12 @@ F:	Documentation/devicetree/bindings/*/*max77802.yaml
 F:	drivers/regulator/max77802-regulator.c
 F:	include/dt-bindings/*/*max77802.h
 
+MAXIM MAX77838 PMIC REGULATOR DEVICE DRIVER
+M:	Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/regulator/maxim,max77838.yaml
+
 MAXIM MAX77976 BATTERY CHARGER
 M:	Luca Ceresoli <luca@lucaceresoli.net>
 S:	Supported