dt-bindings:iio:humidity:st,hts221 yaml conversion.

Straight forward conversion of this temperature and pressure sensor binding.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/20201031134110.724233-4-jic23@kernel.org

Documentation/devicetree/bindings/iio/humidity/hts221.txt

-* HTS221 STM humidity + temperature sensor
-
-Required properties:
-- compatible: should be "st,hts221"
-- reg: i2c address of the sensor / spi cs line
-
-Optional properties:
-- drive-open-drain: the interrupt/data ready line will be configured
-  as open drain, which is useful if several sensors share the same
-  interrupt line. This is a boolean property.
-  If the requested interrupt is configured as IRQ_TYPE_LEVEL_HIGH or
-  IRQ_TYPE_EDGE_RISING a pull-down resistor is needed to drive the line
-  when it is not active, whereas a pull-up one is needed when interrupt
-  line is configured as IRQ_TYPE_LEVEL_LOW or IRQ_TYPE_EDGE_FALLING.
-  Refer to pinctrl/pinctrl-bindings.txt for the property description.
-- interrupts: interrupt mapping for IRQ. It should be configured with
-  flags IRQ_TYPE_LEVEL_HIGH, IRQ_TYPE_EDGE_RISING, IRQ_TYPE_LEVEL_LOW or
-  IRQ_TYPE_EDGE_FALLING.
-
-  Refer to interrupt-controller/interrupts.txt for generic interrupt
-  client node bindings.
-
-Example:
-
-hts221@5f {
-	compatible = "st,hts221";
-	reg = <0x5f>;
-	interrupt-parent = <&gpio0>;
-	interrupts = <0 IRQ_TYPE_EDGE_RISING>;
-};

Documentation/devicetree/bindings/iio/humidity/st,hts221.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/humidity/st,hts221.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HTS221 STM humidity + temperature sensor
+
+maintainers:
+  - Lorenzo Bianconi <lorenzo@kernel.org>
+
+description: |
+   Humidity and temperature sensor with I2C interface and data ready
+   interrupt.
+
+properties:
+  compatible:
+    const: st,hts221
+
+  reg:
+    maxItems: 1
+
+  drive-open-drain:
+    type: boolean
+    description:
+      The interrupt/data ready line will be configured as open drain, which
+      is useful if several sensors share the same interrupt line.
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        hts221@5f {
+            compatible = "st,hts221";
+            reg = <0x5f>;
+            interrupt-parent = <&gpio0>;
+            interrupts = <0 IRQ_TYPE_EDGE_RISING>;
+        };
+    };
+...