[PATCH v2 1/3] dt-bindings: hwmon: Add maxim max31790 bindings

[Chanh Nguyen <chanh@os.amperecomputing.com>]

Add a device tree bindings for max31790 device.

Signed-off-by: Chanh Nguyen <chanh@os.amperecomputing.com>
---
Changes in v2:
 - Update filename of the maxim,max31790.yaml                            [Krzysztof]
 - Add the common fan schema to $ref                                     [Krzysztof]
 - Update the node name to "fan-controller" in maxim,max31790.yaml       [Krzysztof]
 - Drop "driver" in commit title                                         [Krzysztof]
---
 .../bindings/hwmon/maxim,max31790.yaml        | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml b/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
new file mode 100644
index 000000000000..a561e5a3e9e4
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/maxim,max31790.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: The Maxim MAX31790 Fan Controller
+
+maintainers:
+  - Guenter Roeck <linux@roeck-us.net>
+
+description: >
+  The MAX31790 controls the speeds of up to six fans using six
+  independent PWM outputs. The desired fan speeds (or PWM duty cycles)
+  are written through the I2C interface.
+
+  Datasheets:
+    https://datasheets.maximintegrated.com/en/ds/MAX31790.pdf
+
+properties:
+  compatible:
+    const: maxim,max31790
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: fan-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      fan-controller@20 {
+        compatible = "maxim,max31790";
+        reg = <0x20>;
+      };
+    };
-- 
2.17.1