dt-bindings: power: Convert ingenic,battery.txt to YAML

Convert the textual documentation of Device Tree bindings for the
Ingenic JZ47xx SoCs battery to YAML.
Signed-off-by: Artur Rojek <contact@artur-rojek.eu>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Documentation/devicetree/bindings/power/supply/ingenic,battery.txt

-* Ingenic JZ47xx battery bindings
-
-Required properties:
-
-- compatible: Must be "ingenic,jz4740-battery".
-- io-channels: phandle and IIO specifier pair to the IIO device.
-  Format described in iio-bindings.txt.
-- monitored-battery: phandle to a "simple-battery" compatible node.
-
-The "monitored-battery" property must be a phandle to a node using the format
-described in battery.txt, with the following properties being required:
-
-- voltage-min-design-microvolt: Drained battery voltage.
-- voltage-max-design-microvolt: Fully charged battery voltage.
-
-Example:
-
-#include <dt-bindings/iio/adc/ingenic,adc.h>
-
-simple_battery: battery {
-	compatible = "simple-battery";
-	voltage-min-design-microvolt = <3600000>;
-	voltage-max-design-microvolt = <4200000>;
-};
-
-ingenic_battery {
-	compatible = "ingenic,jz4740-battery";
-	io-channels = <&adc INGENIC_ADC_BATTERY>;
-	io-channel-names = "battery";
-	monitored-battery = <&simple_battery>;
-};

Documentation/devicetree/bindings/power/supply/ingenic,battery.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019-2020 Artur Rojek
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/power/supply/ingenic,battery.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Ingenic JZ47xx battery bindings
+
+maintainers:
+  - Artur Rojek <contact@artur-rojek.eu>
+
+properties:
+  compatible:
+    const: ingenic,jz4740-battery
+
+  io-channels:
+    maxItems: 1
+
+  io-channel-names:
+    const: battery
+
+  monitored-battery:
+    description: >
+      phandle to a "simple-battery" compatible node.
+
+      This property must be a phandle to a node using the format described
+      in battery.yaml, with the following properties being required:
+      - voltage-min-design-microvolt: drained battery voltage,
+      - voltage-max-design-microvolt: fully charged battery voltage.
+
+required:
+  - compatible
+  - io-channels
+  - io-channel-names
+  - monitored-battery
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/iio/adc/ingenic,adc.h>
+
+    simple_battery: battery {
+            compatible = "simple-battery";
+            voltage-min-design-microvolt = <3600000>;
+            voltage-max-design-microvolt = <4200000>;
+    };
+
+    ingenic-battery {
+            compatible = "ingenic,jz4740-battery";
+            io-channels = <&adc INGENIC_ADC_BATTERY>;
+            io-channel-names = "battery";
+            monitored-battery = <&simple_battery>;
+    };