dt-bindings: hwmon: pwm-fan: Convert to DT schema

Convert the PWM fan bindings to DT schema format.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230406182000.956275-2-cristian.ciocaltea@collabora.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: cristicc

Documentation/devicetree/bindings/hwmon/pwm-fan.txt

@@ -1,67 +1 @@
-Bindings for a fan connected to the PWM lines
-
-Required properties:
-- compatible	: "pwm-fan"
-- pwms		: the PWM that is used to control the PWM fan
-- cooling-levels      : PWM duty cycle values in a range from 0 to 255
-			which correspond to thermal cooling states
-
-Optional properties:
-- fan-supply		: phandle to the regulator that provides power to the fan
-- interrupts		: This contains an interrupt specifier for each fan
-			  tachometer output connected to an interrupt source.
-			  The output signal must generate a defined number of
-			  interrupts per fan revolution, which require that
-			  it must be self resetting edge interrupts. See
-			  interrupt-controller/interrupts.txt for the format.
-- pulses-per-revolution : define the number of pulses per fan revolution for
-			  each tachometer input as an integer (default is 2
-			  interrupts per revolution). The value must be
-			  greater than zero.
-
-Example:
-	fan0: pwm-fan {
-		compatible = "pwm-fan";
-		#cooling-cells = <2>;
-		pwms = <&pwm 0 10000 0>;
-		cooling-levels = <0 102 170 230>;
-	};
-
-	thermal-zones {
-		cpu_thermal: cpu-thermal {
-			     thermal-sensors = <&tmu 0>;
-			     polling-delay-passive = <0>;
-			     polling-delay = <0>;
-			     trips {
-					cpu_alert1: cpu-alert1 {
-						    temperature = <100000>; /* millicelsius */
-						    hysteresis = <2000>; /* millicelsius */
-						    type = "passive";
-					};
-			     };
-			     cooling-maps {
-					map0 {
-						    trip = <&cpu_alert1>;
-						    cooling-device = <&fan0 0 1>;
-					};
-			     };
-		};
-
-Example 2:
-	fan0: pwm-fan {
-		compatible = "pwm-fan";
-		pwms = <&pwm 0 40000 0>;
-		fan-supply = <&reg_fan>;
-		interrupt-parent = <&gpio5>;
-		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
-		pulses-per-revolution = <2>;
-	};
-
-Example 3:
-	fan0: pwm-fan {
-		compatible = "pwm-fan";
-		pwms = <&pwm1 0 25000 0>;
-		interrupts-extended = <&gpio1 1 IRQ_TYPE_EDGE_FALLING>,
-			<&gpio2 5 IRQ_TYPE_EDGE_FALLING>;
-		pulses-per-revolution = <2>, <1>;
-	};
+This file has moved to pwm-fan.yaml.

Documentation/devicetree/bindings/hwmon/pwm-fan.yaml

@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/pwm-fan.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Fan connected to PWM lines
+
+maintainers:
+  - Jean Delvare <jdelvare@suse.com>
+  - Guenter Roeck <linux@roeck-us.net>
+
+properties:
+  compatible:
+    const: pwm-fan
+
+  cooling-levels:
+    description: PWM duty cycle values corresponding to thermal cooling states.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    items:
+      maximum: 255
+
+  fan-supply:
+    description: Phandle to the regulator that provides power to the fan.
+
+  interrupts:
+    description:
+      This contains an interrupt specifier for each fan tachometer output
+      connected to an interrupt source. The output signal must generate a
+      defined number of interrupts per fan revolution, which require that
+      it must be self resetting edge interrupts.
+    maxItems: 1
+
+  pulses-per-revolution:
+    description:
+      Define the number of pulses per fan revolution for each tachometer
+      input as an integer.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 4
+    default: 2
+
+  pwms:
+    description: The PWM that is used to control the fan.
+    maxItems: 1
+
+  "#cooling-cells": true
+
+required:
+  - compatible
+  - pwms
+
+additionalProperties: false
+
+examples:
+  - |
+    pwm-fan {
+      compatible = "pwm-fan";
+      cooling-levels = <0 102 170 230>;
+      pwms = <&pwm 0 10000 0>;
+      #cooling-cells = <2>;
+    };
+
+    thermal-zones {
+      cpu_thermal: cpu-thermal {
+        thermal-sensors = <&tmu 0>;
+        polling-delay-passive = <0>;
+        polling-delay = <0>;
+
+        trips {
+          cpu_alert1: cpu-alert1 {
+            temperature = <100000>; /* millicelsius */
+            hysteresis = <2000>; /* millicelsius */
+            type = "passive";
+          };
+        };
+
+        cooling-maps {
+          map0 {
+            trip = <&cpu_alert1>;
+            cooling-device = <&fan0 0 1>;
+          };
+        };
+      };
+    };
+
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    pwm-fan {
+      compatible = "pwm-fan";
+      pwms = <&pwm 0 40000 0>;
+      fan-supply = <&reg_fan>;
+      interrupt-parent = <&gpio5>;
+      interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
+      pulses-per-revolution = <2>;
+    };