dt-bindings:iio:health:maxim,max30102: txt to yaml conversion

Straight forward binding.  Title was a bit of a challenge to keep short
as this binding covers sensors for two entirely different purposes.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Cc: Matt Ranostay <mranostay@gmail.com>
Link: https://lore.kernel.org/r/20201031184854.745828-11-jic23@kernel.org

Documentation/devicetree/bindings/iio/health/max30102.txt

-Maxim MAX30102 heart rate and pulse oximeter sensor
-Maxim MAX30105 optical particle-sensing module
-
-* https://datasheets.maximintegrated.com/en/ds/MAX30102.pdf
-* https://datasheets.maximintegrated.com/en/ds/MAX30105.pdf
-
-Required properties:
-  - compatible: must be "maxim,max30102" or "maxim,max30105"
-  - reg: the I2C address of the sensor
-  - interrupts: the sole interrupt generated by the device
-
-  Refer to interrupt-controller/interrupts.txt for generic
-  interrupt client node bindings.
-
-Optional properties:
-  - maxim,red-led-current-microamp: configuration for red LED current
-  - maxim,ir-led-current-microamp: configuration for IR LED current
-  - maxim,green-led-current-microamp: configuration for green LED current
-    (max30105 only)
-
-    Note that each step is approximately 200 microamps, ranging from 0 uA to
-    50800 uA.
-
-Example:
-
-max30102@57 {
-	compatible = "maxim,max30102";
-	reg = <0x57>;
-	maxim,red-led-current-microamp = <7000>;
-	maxim,ir-led-current-microamp = <7000>;
-	interrupt-parent = <&gpio1>;
-	interrupts = <16 2>;
-};

Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/health/maxim,max30102.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX30102 heart rate and pulse oximeter and MAX30105 particle-sensor
+
+maintainers:
+  - Matt Ranostay <matt.ranostay@konsulko.com>
+
+properties:
+  compatible:
+    enum:
+      - maxim,max30102
+      - maxim,max30105
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+    description: Connected to ADC_RDY pin.
+
+  maxim,red-led-current-microamp:
+    description: RED LED current. Each step is approximately 200 microamps.
+    minimum: 0
+    maximum: 50800
+
+  maxim,ir-led-current-microamp:
+    description: IR LED current. Each step is approximately 200 microamps.
+    minimum: 0
+    maximum: 50800
+
+  maxim,green-led-current-microamp:
+    description: Green LED current. Each step is approximately 200 microamps.
+    minimum: 0
+    maximum: 50800
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: maxim,max30100
+    then:
+      properties:
+        maxim,green-led-current-microamp: false
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        heart-rate@57 {
+            compatible = "maxim,max30102";
+            reg = <0x57>;
+            maxim,red-led-current-microamp = <7000>;
+            maxim,ir-led-current-microamp = <7000>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <16 2>;
+        };
+    };
+...