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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/microchip,emc2305.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Microchip EMC2305 SMBus compliant PWM fan controller
maintainers:
- Michael Shych <michaelsh@nvidia.com>
description:
Microchip EMC2301/2/3/5 pwm controller which supports up to five programmable
fan control circuits.
properties:
compatible:
oneOf:
- enum:
- microchip,emc2305
- items:
- enum:
- microchip,emc2303
- microchip,emc2302
- microchip,emc2301
- const: microchip,emc2305
reg:
maxItems: 1
'#address-cells':
const: 1
'#size-cells':
const: 0
'#pwm-cells':
const: 3
description: |
Number of cells in a PWM specifier.
- cell 0: The PWM frequency
- cell 1: The PWM polarity: 0 or PWM_POLARITY_INVERTED
- cell 2: The PWM output config:
- 0 (Open-Drain)
- 1 (Push-Pull)
patternProperties:
'^fan@[0-4]$':
$ref: fan-common.yaml#
unevaluatedProperties: false
properties:
reg:
description:
The fan number used to determine the associated PWM channel.
maxItems: 1
required:
- reg
required:
- compatible
- reg
additionalProperties: false
examples:
- |
#include <dt-bindings/pwm/pwm.h>
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 = <3>;
fan@0 {
reg = <0x0>;
pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>;
#cooling-cells = <2>;
};
fan@1 {
reg = <0x1>;
pwms = <&fan_controller 26000 0 1>;
#cooling-cells = <2>;
};
fan@2 {
reg = <0x2>;
pwms = <&fan_controller 26000 0 1>;
#cooling-cells = <2>;
};
fan@3 {
reg = <0x3>;
pwms = <&fan_controller 26000 0 1>;
#cooling-cells = <2>;
};
fan@4 {
reg = <0x4>;
pwms = <&fan_controller 26000 0 1>;
#cooling-cells = <2>;
};
};
};
...
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