[PATCH v4 1/3] dt-bindings: hwmon: Add Microchip emc2305 support

From: florin . leotescu
Date: Thu Mar 13 2025 - 08:51:05 EST


From: Florin Leotescu <florin.leotescu@xxxxxxx>

Introduce yaml schema for Microchip emc2305 pwm fan controller.

Signed-off-by: Florin Leotescu <florin.leotescu@xxxxxxx>
---
.../bindings/hwmon/microchip,emc2305.yaml | 104 ++++++++++++++++++
1 file changed, 104 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
new file mode 100644
index 000000000000..3107fcafcf6a
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
@@ -0,0 +1,104 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/hwmon/microchip,emc2305.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip EMC2305 SMBus compliant PWM fan controller
+
+maintainers:
+ - Michael Shych <michaelsh@xxxxxxxxxx>
+
+description:
+ Microchip EMC2301/2/3/5 pwm controller which supports
+ up to five programmable fan control circuits.
+
+properties:
+ compatible:
+ oneOf:
+ - enum:
+ - microchip,emc2305
+ - items:
+ - enum:
+ - microchip,emc2303
+ - microchip,emc2302
+ - microchip,emc2301
+ - const: microchip,emc2305
+
+ reg:
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ '#pwm-cells':
+ const: 2
+
+patternProperties:
+ "^fan@[0-4]$":
+ $ref: fan-common.yaml#
+ unevaluatedProperties: false
+ properties:
+ reg:
+ description:
+ The fan number.
+
+ required:
+ - reg
+ - pwms
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ fan_controller: fan-controller@2f {
+ compatible = "microchip,emc2305";
+ reg = <0x2f>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #pwm-cells = <2>;
+
+ fan@0 {
+ #cooling-cells = <2>;
+ reg = <0x0>;
+ pwms = <&fan_controller 1 1>;
+ };
+
+ fan@1 {
+ #cooling-cells = <2>;
+ reg = <0x1>;
+ pwms = <&fan_controller 1 1>;
+ };
+
+ fan@2 {
+ #cooling-cells = <2>;
+ reg = <0x2>;
+ pwms = <&fan_controller 1 1>;
+ };
+
+ fan@3 {
+ #cooling-cells = <2>;
+ reg = <0x3>;
+ pwms = <&fan_controller 1 1>;
+ };
+
+ fan@4 {
+ #cooling-cells = <2>;
+ reg = <0x4>;
+ pwms = <&fan_controller 1 1>;
+ };
+ };
+ };
+...
--
2.34.1