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diff --git a/Documentation/devicetree/bindings/iio/humidity/st,hts221.yaml b/Documentation/devicetree/bindings/iio/humidity/st,hts221.yaml
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+++ b/Documentation/devicetree/bindings/iio/humidity/st,hts221.yaml
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+# 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.
+
+  vdd-supply: true
+
+  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>;
+        };
+    };
+...