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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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f2a32ed869
The fan can be used as a cooling device, add a description of the `cooling-levels` property and restrict the maximum value to 255, which is the highest PWM duty cycle supported by the AMC6821 fan controller. Signed-off-by: João Paulo Gonçalves <joao.goncalves@toradex.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20250613-b4-amc6821-cooling-device-support-v4-1-a8fc063c55de@toradex.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
109 lines
2.2 KiB
YAML
109 lines
2.2 KiB
YAML
# 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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$id: http://devicetree.org/schemas/hwmon/ti,amc6821.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: AMC6821 Intelligent Temperature Monitor and PWM Fan Controller
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maintainers:
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- Farouk Bouabid <farouk.bouabid@cherry.de>
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- Quentin Schulz <quentin.schulz@cherry.de>
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description:
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Intelligent temperature monitor and pulse-width modulation (PWM) fan
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controller.
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properties:
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compatible:
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oneOf:
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- items:
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- const: tsd,mule
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- const: ti,amc6821
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- const: ti,amc6821
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reg:
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maxItems: 1
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i2c-mux:
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type: object
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fan:
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$ref: fan-common.yaml#
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unevaluatedProperties: false
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properties:
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cooling-levels:
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description: PWM duty cycle values corresponding to thermal cooling states.
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items:
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maximum: 255
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"#pwm-cells":
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const: 2
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description: |
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Number of cells in a PWM specifier.
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- cell 0: PWM period in nanoseconds
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- cell 1: PWM polarity: 0 or PWM_POLARITY_INVERTED
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required:
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- compatible
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- reg
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if:
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properties:
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compatible:
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contains:
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const: tsd,mule
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then:
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required:
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- i2c-mux
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additionalProperties: false
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examples:
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- |
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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@18 {
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compatible = "ti,amc6821";
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reg = <0x18>;
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#pwm-cells = <2>;
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fan {
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pwms = <&fan_controller 40000 0>;
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};
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};
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};
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- |
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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fan@18 {
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compatible = "tsd,mule", "ti,amc6821";
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reg = <0x18>;
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i2c-mux {
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compatible = "tsd,mule-i2c-mux";
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#address-cells = <1>;
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#size-cells = <0>;
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i2c@0 {
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reg = <0x0>;
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#address-cells = <1>;
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#size-cells = <0>;
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rtc@6f {
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compatible = "isil,isl1208";
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reg = <0x6f>;
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};
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};
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};
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};
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};
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...
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