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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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9f8e2e49c5
This adds an optional regulator support (e.g. switchable supply) to the GPIO fan binding. Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20250210145934.761280-2-alexander.stein@ew.tq-group.com [groeck: Changed power supply description as suggested by Krzysztof] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
64 lines
1.4 KiB
YAML
64 lines
1.4 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/hwmon/gpio-fan.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Fan connected to GPIO lines
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maintainers:
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- Rob Herring <robh@kernel.org>
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properties:
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compatible:
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const: gpio-fan
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gpios:
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description: |
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Specifies the pins that map to bits in the control value,
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ordered MSB-->LSB.
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minItems: 1
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maxItems: 7
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alarm-gpios:
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maxItems: 1
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fan-supply:
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description: Power supply for fan
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gpio-fan,speed-map:
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$ref: /schemas/types.yaml#/definitions/uint32-matrix
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minItems: 2
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maxItems: 127
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items:
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items:
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- description: fan speed in RPMs
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- description: control value
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description: |
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A mapping of possible fan RPM speeds and the
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control value that should be set to achieve them. This array
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must have the RPM values in ascending order.
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'#cooling-cells':
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const: 2
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required:
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- compatible
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- gpios
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- gpio-fan,speed-map
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additionalProperties: false
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examples:
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- |
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gpio-fan {
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compatible = "gpio-fan";
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gpios = <&gpio2 14 1
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&gpio2 13 1>;
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gpio-fan,speed-map = < 0 0>,
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<3000 1>,
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<6000 2>;
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alarm-gpios = <&gpio2 15 1>;
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#cooling-cells = <2>; /* min followed by max */
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};
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