dt-bindings: input: pwm-vibrator: Convert txt bindings to yaml

Converts txt binding to new YAML format and simplify example.
Reviewed-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211208183434.98087-1-david@ixit.cz

Documentation/devicetree/bindings/input/pwm-vibrator.txt

-* PWM vibrator device tree bindings
-
-Registers a PWM device as vibrator. It is expected, that the vibrator's
-strength increases based on the duty cycle of the enable PWM channel
-(100% duty cycle meaning strongest vibration, 0% meaning no vibration).
-
-The binding supports an optional direction PWM channel, that can be
-driven at fixed duty cycle. If available this is can be used to increase
-the vibration effect of some devices.
-
-Required properties:
-- compatible: should contain "pwm-vibrator"
-- pwm-names: Should contain "enable" and optionally "direction"
-- pwms: Should contain a PWM handle for each entry in pwm-names
-
-Optional properties:
-- vcc-supply: Phandle for the regulator supplying power
-- direction-duty-cycle-ns: Duty cycle of the direction PWM channel in
-                           nanoseconds, defaults to 50% of the channel's
-			   period.
-
-Example from Motorola Droid 4:
-
-&omap4_pmx_core {
-	vibrator_direction_pin: pinmux_vibrator_direction_pin {
-		pinctrl-single,pins = <
-		OMAP4_IOPAD(0x1ce, PIN_OUTPUT | MUX_MODE1) /* dmtimer8_pwm_evt (gpio_27) */
-		>;
-	};
-
-	vibrator_enable_pin: pinmux_vibrator_enable_pin {
-		pinctrl-single,pins = <
-		OMAP4_IOPAD(0X1d0, PIN_OUTPUT | MUX_MODE1) /* dmtimer9_pwm_evt (gpio_28) */
-		>;
-	};
-};
-
-/ {
-	pwm8: dmtimer-pwm {
-		pinctrl-names = "default";
-		pinctrl-0 = <&vibrator_direction_pin>;
-
-		compatible = "ti,omap-dmtimer-pwm";
-		#pwm-cells = <3>;
-		ti,timers = <&timer8>;
-		ti,clock-source = <0x01>;
-	};
-
-	pwm9: dmtimer-pwm {
-		pinctrl-names = "default";
-		pinctrl-0 = <&vibrator_enable_pin>;
-
-		compatible = "ti,omap-dmtimer-pwm";
-		#pwm-cells = <3>;
-		ti,timers = <&timer9>;
-		ti,clock-source = <0x01>;
-	};
-
-	vibrator {
-		compatible = "pwm-vibrator";
-		pwms = <&pwm9 0 1000000000 0>,
-                       <&pwm8 0 1000000000 0>;
-		pwm-names = "enable", "direction";
-		direction-duty-cycle-ns = <1000000000>;
-	};
-};

Documentation/devicetree/bindings/input/pwm-vibrator.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/input/pwm-vibrator.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: PWM vibrator
+
+maintainers:
+  - Sebastian Reichel <sre@kernel.org>
+
+description: >
+  Registers a PWM device as vibrator. It is expected, that the vibrator's
+  strength increases based on the duty cycle of the enable PWM channel
+  (100% duty cycle meaning strongest vibration, 0% meaning no vibration).
+
+  The binding supports an optional direction PWM channel, that can be
+  driven at fixed duty cycle. If available this is can be used to increase
+  the vibration effect of some devices.
+
+properties:
+  compatible:
+    const: pwm-vibrator
+
+  pwm-names:
+    items:
+      - const: enable
+      - const: direction
+    minItems: 1
+
+  pwms:
+    minItems: 1
+    maxItems: 2
+
+  vcc-supply: true
+
+  direction-duty-cycle-ns:
+    description: >
+      Duty cycle of the direction PWM channel in nanoseconds,
+      defaults to 50% of the channel's period.
+
+required:
+  - compatible
+  - pwm-names
+  - pwms
+
+additionalProperties: false
+
+examples:
+  - |
+    vibrator {
+        compatible = "pwm-vibrator";
+        pwms = <&pwm9 0 1000000000 0>,
+               <&pwm8 0 1000000000 0>;
+        pwm-names = "enable", "direction";
+        direction-duty-cycle-ns = <1000000000>;
+    };