112 lines
2.5 KiB
YAML
112 lines
2.5 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/hwmon/microchip,emc2305.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Microchip EMC2305 SMBus compliant PWM fan controller
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maintainers:
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- Michael Shych <michaelsh@nvidia.com>
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description:
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Microchip EMC2301/2/3/5 pwm controller which supports up to five programmable
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fan control circuits.
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properties:
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compatible:
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oneOf:
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- enum:
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- microchip,emc2305
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- items:
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- enum:
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- microchip,emc2303
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- microchip,emc2302
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- microchip,emc2301
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- const: microchip,emc2305
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reg:
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maxItems: 1
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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'#pwm-cells':
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const: 3
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description: |
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Number of cells in a PWM specifier.
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- cell 0: The PWM frequency
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- cell 1: The PWM polarity: 0 or PWM_POLARITY_INVERTED
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- cell 2: The PWM output config:
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- 0 (Open-Drain)
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- 1 (Push-Pull)
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patternProperties:
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'^fan@[0-4]$':
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$ref: fan-common.yaml#
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unevaluatedProperties: false
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properties:
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reg:
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description:
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The fan number used to determine the associated PWM channel.
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maxItems: 1
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required:
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- reg
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/pwm/pwm.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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fan_controller: fan-controller@2f {
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compatible = "microchip,emc2305";
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reg = <0x2f>;
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#address-cells = <1>;
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#size-cells = <0>;
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#pwm-cells = <3>;
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fan@0 {
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reg = <0x0>;
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pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>;
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#cooling-cells = <2>;
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};
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fan@1 {
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reg = <0x1>;
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pwms = <&fan_controller 26000 0 1>;
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#cooling-cells = <2>;
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};
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fan@2 {
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reg = <0x2>;
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pwms = <&fan_controller 26000 0 1>;
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#cooling-cells = <2>;
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};
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fan@3 {
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reg = <0x3>;
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pwms = <&fan_controller 26000 0 1>;
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#cooling-cells = <2>;
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};
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fan@4 {
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reg = <0x4>;
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pwms = <&fan_controller 26000 0 1>;
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#cooling-cells = <2>;
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};
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};
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};
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...
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