new file mode 100644
@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/microchip,emc2301.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip EMC230X family RPM fan controller
+
+maintainers:
+ - Mathew McBride <matt@traverse.com.au>
+
+description: |
+ The Microchip EMC230X family (formerly produced by SMSC) is a family
+ of fan controllers which can drive via a set PWM period or
+ to a target RPM speed. They are available in variants from 1 to 5
+ independent channels.
+
+ Product information:
+ https://www.microchip.com/en-us/product/EMC2301
+ https://www.microchip.com/en-us/product/EMC2302
+ https://www.microchip.com/en-us/product/EMC2303
+ https://www.microchip.com/en-us/product/EMC2305
+
+
+properties:
+ compatible:
+ enum:
+ - microchip,emc2301
+ - microchip,emc2302
+ - microchip,emc2303
+ - microchip,emc2305
+ reg:
+ maxItems: 1
+
+ "#address-cells": true
+
+ "#size-cells": true
+
+required:
+ - compatible
+ - reg
+
+patternProperties:
+ "fan@[0-9]+$":
+ type: object
+ description: Fan channel properties for use as a thermal cooling device
+
+ properties:
+ min-rpm:
+ description: Minimum fan RPM when used as a cooling device
+ maxItems: 1
+ max-rpm:
+ description: Maximum fan RPM when used as a cooling device
+ maxItems: 1
+ reg:
+ description: Channel number on EMC230X device the fan is attached to
+ maxItems: 1
+ "#cooling-cells":
+ const: 2
+ required:
+ - reg
+ - min-rpm
+ - max-rpm
+ - "#cooling-cells"
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ fanctrl@2f {
+ compatible = "microchip,emc2301";
+ reg = <0x2f>;
+
+ fan@0 {
+ min-rpm = /bits/ 16 <3500>;
+ max-rpm = /bits/ 16 <5000>;
+ reg = <0>;
+ }
+ };
+ };
@@ -8046,6 +8046,7 @@ MICROCHIP EMC230X PWM-FAN CONTROLLER DRIVERS
M: Mathew McBride <matt@traverse.com.au>
L: linux-hwmon@vger.kernel.org
S: Maintained
+F: Documentation/devicetree/bindings/hwmon/microchip,emc2301.yaml
F: drivers/hwmon/emc230x.c
MICROCHIP POLARFIRE FPGA DRIVERS
Add a binding for the Microchip EMC230X fan controller family, which is supported by the new "emc230x" hwmon driver. Signed-off-by: Mathew McBride <matt@traverse.com.au> --- .../bindings/hwmon/microchip,emc2301.yaml | 83 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 84 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,emc2301.yaml