dt-bindings: iio: magnetometer: add binding for Si7210

Silicon Labs Si7210 is an I2C Hall effect magnetic position
and temperature sensor.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Antoni Pokusinski <apokusinski01@gmail.com>
Link: https://patch.msgid.link/20250120215620.39766-2-apokusinski01@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/magnetometer/silabs,si7210.yaml

@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/magnetometer/silabs,si7210.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Si7210 magnetic position and temperature sensor
+
+maintainers:
+  - Antoni Pokusinski <apokusinski01@gmail.com>
+
+description: |
+  Silabs Si7210 I2C Hall effect magnetic position and temperature sensor.
+  https://www.silabs.com/documents/public/data-sheets/si7210-datasheet.pdf
+
+properties:
+  compatible:
+    const: silabs,si7210
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator that provides power to the sensor
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        magnetometer@30 {
+            compatible = "silabs,si7210";
+            reg = <0x30>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
+            vdd-supply = <&vdd_3v3_reg>;
+        };
+    };