dt-bindings: power: supply: ltc294x: Convert to DT schema format

Convert the binding to DT schema format.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/power/supply/lltc,ltc294x.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/power/supply/lltc,ltc294x.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Binding for LTC2941, LTC2942, LTC2943 and LTC2944 battery fuel gauges
+
+description: |
+  All chips measure battery capacity.
+  The LTC2942 is pin compatible with the LTC2941, it adds voltage and
+  temperature monitoring, and is runtime detected. LTC2943 and LTC2944
+  are software compatible, uses a slightly different conversion formula
+  for the charge counter and adds voltage, current and temperature monitoring.
+
+maintainers:
+  - Sebastian Reichel <sre@kernel.org>
+
+allOf:
+  - $ref: power-supply.yaml#
+
+properties:
+  compatible:
+    enum:
+      - lltc,ltc2941
+      - lltc,ltc2942
+      - lltc,ltc2943
+      - lltc,ltc2944
+
+  reg:
+    maxItems: 1
+
+  lltc,resistor-sense:
+    $ref: /schemas/types.yaml#/definitions/int32
+    description: |
+      Sense resistor value in milli-ohms.
+      Can be negative value when the battery has been connected to the wrong end of the resistor.
+
+  lltc,prescaler-exponent:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      The prescaler exponent as explained in the datasheet.
+      This determines the range and accuracy of the gauge.
+      The value is programmed into the chip only if it differs from the current setting.
+      The setting is lost when the battery is disconnected.
+
+required:
+  - compatible
+  - reg
+  - lltc,resistor-sense
+  - lltc,prescaler-exponent
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c0 {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      battery@64 {
+        compatible = "lltc,ltc2943";
+        reg = <0x64>;
+        lltc,resistor-sense = <15>;
+        lltc,prescaler-exponent = <5>; /* 2^(2*5) = 1024 */
+      };
+    };

Documentation/devicetree/bindings/power/supply/ltc2941.txt

-binding for LTC2941, LTC2942, LTC2943 and LTC2944 battery gauges
-
-All chips measure battery capacity.
-The LTC2942 is pin compatible with the LTC2941, it adds voltage and
-temperature monitoring, and is runtime detected. LTC2943 and LTC2944
-is software compatible, uses a slightly different conversion formula
-for the charge counter and adds voltage, current and temperature monitoring.
-
-Required properties:
-- compatible: Should contain "lltc,ltc2941", "lltc,ltc2942", "lltc,ltc2943"
-    or "lltc,ltc2944" which also indicates the type of I2C chip attached.
-- reg: The 7-bit I2C address.
-- lltc,resistor-sense: The sense resistor value in milli-ohms. Can be a 32-bit
-    negative value when the battery has been connected to the wrong end of the
-    resistor.
-- lltc,prescaler-exponent: The prescaler exponent as explained in the datasheet.
-    This determines the range and accuracy of the gauge. The value is programmed
-    into the chip only if it differs from the current setting. The setting is
-    lost when the battery is disconnected.
-
-Example from the Topic Miami Florida board:
-
-	fuelgauge: ltc2943@64 {
-		compatible = "lltc,ltc2943";
-		reg = <0x64>;
-		lltc,resistor-sense = <15>;
-		lltc,prescaler-exponent = <5>; /* 2^(2*5) = 1024 */
-	};