dt-bindings: power: supply: cpcap-charger: Convert to DT schema format

Convert the binding to DT schema format. I also added the missing bits
used by the only in-tree user and implemented in the driver.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/power/supply/cpcap-charger.txt

-Motorola CPCAP PMIC battery charger binding
-
-Required properties:
-- compatible: Shall be "motorola,mapphone-cpcap-charger"
-- interrupts: Interrupt specifier for each name in interrupt-names
-- interrupt-names: Should contain the following entries:
-		   "chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",
-		   "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
-		   "battdetb"
-- io-channels: IIO ADC channel specifier for each name in io-channel-names
-- io-channel-names: Should contain the following entries:
-		    "battdetb", "battp", "vbus", "chg_isense", "batti"
-
-Optional properties:
-- mode-gpios: Optionally CPCAP charger can have a companion wireless
-	      charge controller that is controlled with two GPIOs
-	      that are active low.
-
-Example:
-
-cpcap_charger: charger {
-	compatible = "motorola,mapphone-cpcap-charger";
-	interrupts-extended = <
-		&cpcap 13 0 &cpcap 12 0 &cpcap 29 0 &cpcap 28 0
-		&cpcap 22 0 &cpcap 21 0 &cpcap 20 0 &cpcap 19 0
-		&cpcap 54 0
-	>;
-	interrupt-names =
-		"chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",
-		"rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
-		"battdetb";
-	mode-gpios = <&gpio3 29 GPIO_ACTIVE_LOW
-		      &gpio3 23 GPIO_ACTIVE_LOW>;
-	io-channels = <&cpcap_adc 0 &cpcap_adc 1
-		       &cpcap_adc 2 &cpcap_adc 5
-		       &cpcap_adc 6>;
-	io-channel-names = "battdetb", "battp",
-			   "vbus", "chg_isense",
-			   "batti";
-};

Documentation/devicetree/bindings/power/supply/cpcap-charger.yaml

+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2021 Sebastian Reichel
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/power/supply/cpcap-charger.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Motorola CPCAP PMIC charger
+
+maintainers:
+  - Tony Lindgren <tony@atomide.com>
+  - Sebastian Reichel <sre@kernel.org>
+
+description: |
+  Motorola CPCAP is a PMIC found in some mobile phones, e.g.
+  the Droid 4. This binding describes its battery charger
+  sub-function.
+
+allOf:
+  - $ref: power-supply.yaml#
+
+properties:
+  compatible:
+    const: motorola,mapphone-cpcap-charger
+
+  interrupts:
+    items:
+      - description: charger detection interrupt
+      - description: reverse charge interrupt
+      - description: SE1 charger detection interrupt
+      - description: SE0 charger detection interrupt
+      - description: reverse mode interrupt
+      - description: charge current 2 interrupt
+      - description: charge current 1 interrupt
+      - description: VBUS valid interrupt
+      - description: battery detect interrupt
+
+  interrupt-names:
+    items:
+      - const: chrg_det
+      - const: rvrs_chrg
+      - const: chrg_se1b
+      - const: se0conn
+      - const: rvrs_mode
+      - const: chrgcurr2
+      - const: chrgcurr1
+      - const: vbusvld
+      - const: battdetb
+
+  io-channels:
+    items:
+      - description: battery temperature
+      - description: battery voltage
+      - description: VBUS voltage
+      - description: battery charge current
+      - description: battery current
+
+  io-channel-names:
+    items:
+      - const: battdetb
+      - const: battp
+      - const: vbus
+      - const: chg_isense
+      - const: batti
+
+  mode-gpios:
+    description: |
+      Optionally CPCAP charger can have a companion wireless
+      charge controller that is controlled with two GPIOs
+      that are active low.
+    minItems: 2
+    maxItems: 2
+
+required:
+  - compatible
+  - interrupts
+  - interrupt-names
+  - io-channels
+  - io-channel-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    cpcap {
+      charger {
+        compatible = "motorola,mapphone-cpcap-charger";
+        interrupts-extended =
+                <&cpcap 13 0>, <&cpcap 12 0>, <&cpcap 29 0>, <&cpcap 28 0>,
+                <&cpcap 22 0>, <&cpcap 21 0>, <&cpcap 20 0>, <&cpcap 19 0>,
+                <&cpcap 54 0>;
+        interrupt-names =
+                "chrg_det", "rvrs_chrg", "chrg_se1b", "se0conn",
+                "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
+                "battdetb";
+        mode-gpios = <&gpio3 29 GPIO_ACTIVE_LOW>,
+                     <&gpio3 23 GPIO_ACTIVE_LOW>;
+        io-channels = <&cpcap_adc 0>, <&cpcap_adc 1>,
+                      <&cpcap_adc 2>, <&cpcap_adc 5>,
+                      <&cpcap_adc 6>;
+        io-channel-names = "battdetb", "battp",
+                           "vbus", "chg_isense",
+                           "batti";
+      };
+    };