dt-bindings: mfd: max8925: Convert to DT schema format

Convert the binding to DT schema format.

The sub-functions of this MFD device do not have their own compatible
string and are thus described directly in the MFD binding document
after being converted to YAML.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231023131409.1796451-1-sebastian.reichel@collabora.comSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/leds/backlight/max8925-backlight.txt

-88pm860x-backlight bindings
-
-Optional properties:
-  - maxim,max8925-dual-string: whether support dual string
-
-Example:
-
-	backlights {
-		maxim,max8925-dual-string = <0>;
-	};

Documentation/devicetree/bindings/mfd/max8925.txt

-* Maxim max8925 Power Management IC
-
-Required parent device properties:
-- compatible : "maxim,max8925"
-- reg : the I2C slave address for the max8925 chip
-- interrupts : IRQ line for the max8925 chip
-- interrupt-controller: describes the max8925 as an interrupt
-  controller (has its own domain)
-- #interrupt-cells : should be 1.
-	- The cell is the max8925 local IRQ number
-
-Optional parent device properties:
-- maxim,tsc-irq: there are 2 IRQ lines for max8925, one is indicated in
-  interrupts property, the other is indicated here.
-
-max8925 consists of a large and varied group of sub-devices:
-
-Device			 Supply Names	 Description
-------			 ------------	 -----------
-max8925-onkey		:		: On key
-max8925-rtc		:		: RTC
-max8925-regulator	:		: Regulators
-max8925-backlight	:		: Backlight
-max8925-touch		:		: Touchscreen
-max8925-power		:		: Charger
-
-Example:
-
-	pmic: max8925@3c {
-		compatible = "maxim,max8925";
-		reg = <0x3c>;
-		interrupts = <1>;
-		interrupt-parent = <&intcmux4>;
-		interrupt-controller;
-		#interrupt-cells = <1>;
-		maxim,tsc-irq = <0>;
-
-		regulators {
-			SDV1 {
-				regulator-min-microvolt = <637500>;
-				regulator-max-microvolt = <1425000>;
-				regulator-boot-on;
-				regulator-always-on;
-			};
-
-			LDO1 {
-				regulator-min-microvolt = <750000>;
-				regulator-max-microvolt = <3900000>;
-				regulator-boot-on;
-				regulator-always-on;
-			};
-
-		};
-		backlight {
-			maxim,max8925-dual-string = <0>;
-		};
-		charger {
-			batt-detect = <0>;
-			topoff-threshold = <1>;
-			fast-charge = <7>;
-			no-temp-support = <0>;
-			no-insert-detect = <0>;
-		};
-	};

Documentation/devicetree/bindings/mfd/maxim,max8925.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/maxim,max8925.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MAX8925 PMIC from Maxim Integrated.
+
+maintainers:
+  - Lee Jones <lee@kernel.org>
+
+properties:
+  compatible:
+    const: maxim,max8925
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 1
+    description:
+      The cell is the IRQ number
+
+  maxim,tsc-irq:
+    description: second interrupt from max8925
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  regulators:
+    type: object
+
+    patternProperties:
+      "^SDV[1-3]$|^LDO[1-9]$|^LDO1[0-9]$|^LDO20$":
+        description: regulator configuration for SDV1-3 and LDO1-20
+        $ref: /schemas/regulator/regulator.yaml
+        unevaluatedProperties: false
+
+    additionalProperties: false
+
+  backlight:
+    type: object
+    properties:
+      maxim,max8925-dual-string:
+        description: set to 1 to support dual string
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        default: 0
+
+    additionalProperties: false
+
+  charger:
+    type: object
+    properties:
+      batt-detect:
+        description: set to 1 if battery detection via ID pin is supported
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        default: 0
+
+      topoff-threshold:
+        description: charging current in topoff mode, configures bits 5-6 in CHG_CNTL1
+        $ref: /schemas/types.yaml#/definitions/uint32
+        minimum: 0
+        maximum: 3
+        default: 0
+
+      fast-charge:
+        description: set charging current in fast mode, configures bits 0-3 in CHG_CNTL1
+        $ref: /schemas/types.yaml#/definitions/uint32
+        minimum: 0
+        maximum: 7
+        default: 0
+
+      no-temp-support:
+        description: set to 1 if temperature sensing is not supported
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        default: 0
+
+      no-insert-detect:
+        description: set to 1 if AC detection is not supported
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1]
+        default: 0
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-controller
+  - "#interrupt-cells"
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pmic@3c {
+            compatible = "maxim,max8925";
+            reg = <0x3c>;
+            interrupts = <1>;
+            interrupt-parent = <&intcmux4>;
+            interrupt-controller;
+            #interrupt-cells = <1>;
+            maxim,tsc-irq = <0>;
+
+            regulators {
+                SDV1 {
+                    regulator-min-microvolt = <637500>;
+                    regulator-max-microvolt = <1425000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                };
+
+                LDO1 {
+                    regulator-min-microvolt = <750000>;
+                    regulator-max-microvolt = <3900000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                };
+            };
+
+            backlight {
+                maxim,max8925-dual-string = <0>;
+            };
+
+            charger {
+                batt-detect = <0>;
+                topoff-threshold = <1>;
+                fast-charge = <7>;
+                no-temp-support = <0>;
+                no-insert-detect = <0>;
+            };
+        };
+    };

Documentation/devicetree/bindings/power/supply/max8925_battery.txt

-max8925-battery bindings
-~~~~~~~~~~~~~~~~
-
-Optional properties :
- - batt-detect: whether support battery detect
- - topoff-threshold: set charging current in topoff mode
- - fast-charge: set charging current in fast mode
- - no-temp-support: whether support temperature protection detect
- - no-insert-detect: whether support insert detect
-
-Example:
-	charger {
-		batt-detect = <0>;
-		topoff-threshold = <1>;
-		fast-charge = <7>;
-		no-temp-support = <0>;
-		no-insert-detect = <0>;
-	};