[PATCH 1/3] dt-bindings: hwmon: fan: Add fan binding to schema

[Naresh Solanki <naresh.solanki@xxxxxxxxxxxxx>]

Add common fan properties bindings to a schema.

Bindings for fan controllers can reference the common schema for the
fan

child nodes:

  patternProperties:
    "^fan@[0-2]":
      type: object
      allOf:
        - $ref: fan-common.yaml#

Signed-off-by: Naresh Solanki <Naresh.Solanki@xxxxxxxxxxxxx>
---
 .../devicetree/bindings/hwmon/fan-common.yaml | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/fan-common.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/fan-common.yaml b/Documentation/devicetree/bindings/hwmon/fan-common.yaml
new file mode 100644
index 000000000000..6bb990f00e94
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/fan-common.yaml
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/fan-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common fan properties
+
+properties:
+  max-rpm:
+    description:
+      Max RPM supported by fan
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  pulse-per-revolution:
+    description:
+      The number of pulse from fan sensor per revolution.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  target-rpm:
+    description:
+      Target RPM the fan should be configured during driver probe.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  pwm-frequency:
+    description:
+      PWM frequency for fan.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  pwm-polarity-inverse:
+    description:
+      PWM polarity for fan.
+    type: boolean
+
+  label:
+    description:
+      Optional fan label
+    $ref: /schemas/types.yaml#/definitions/string
+
+additionalProperties: true
+
+examples:
+  - |
+
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        fan-controller@30 {
+            compatible = "maxim,max6639";
+            reg = <0x30>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            fan@0 {
+                reg = <0>;
+                label = "CPU0_Fan";
+                max-rpm = <32000>;
+                pulse-per-revolution = <2>;
+                target-rpm = <2000>;
+                pwm-frequency = <25000>;
+            };
+
+            fan@1 {
+                reg = <1>;
+                label = "PCIe0_Fan";
+                max-rpm = <32000>;
+                pulse-per-revolution = <2>;
+                target-rpm = <2000>;
+                pwm-frequency = <25000>;
+            };
+
+        };
+    };
+
+...
-- 
2.37.3