dt-bindings:iio:light:ti,opt3001: txt to yaml conversion

Straight forward format conversion of this simple binding.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Andreas Dannenberg <dannenberg@ti.com>
Link: https://lore.kernel.org/r/20201031184854.745828-19-jic23@kernel.org

Documentation/devicetree/bindings/iio/light/opt3001.txt

-* Texas Instruments OPT3001 Ambient Light Sensor
-
-The driver supports interrupt-driven and interrupt-less operation, depending
-on whether an interrupt property has been populated into the DT. Note that
-the optional generation of IIO events on rising/falling light threshold changes
-requires the use of interrupts. Without interrupts, only the simple reading
-of the current light value is supported through the IIO API.
-
-https://www.ti.com/product/opt3001
-
-Required properties:
-  - compatible: should be "ti,opt3001"
-  - reg: the I2C address of the sensor
-
-Optional properties:
-  - interrupts: interrupt mapping for GPIO IRQ (configure for falling edge)
-
-Example:
-
-opt3001@44 {
-	compatible = "ti,opt3001";
-	reg = <0x44>;
-	interrupt-parent = <&gpio1>;
-	interrupts = <28 IRQ_TYPE_EDGE_FALLING>;
-};

Documentation/devicetree/bindings/iio/light/ti,opt3001.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/ti,opt3001.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments OPT3001 Ambient Light Sensor
+
+maintainers:
+  - Andreas Dannenberg <dannenberg@ti.com>
+
+description: |
+  The device supports interrupt-driven and interrupt-less operation, depending
+  on whether an interrupt property has been populated into the DT.
+
+properties:
+  compatible:
+    const: ti,opt3001
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+    description: Should be configured with type IRQ_TYPE_EDGE_FALLING
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        light-sensor@44 {
+            compatible = "ti,opt3001";
+            reg = <0x44>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <28 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };
+...