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charset="utf-8" From: Florin Leotescu The EMC2305 fan controller supports multiple independent PWM fan outputs. Some systems require fans to enter a defined safe state during system shutdown or reboot handoff, until firmware or the next boot stage reconfigures the controller. Add an optional "fan-shutdown-percent" property to fan child nodes allowing the shutdown fan speed to be configured per fan output. Signed-off-by: Florin Leotescu --- .../devicetree/bindings/hwmon/microchip,emc2305.yaml | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml= b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml index d3f06ebc19fa..8c2548539d7f 100644 --- a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml +++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml @@ -54,6 +54,12 @@ patternProperties: The fan number used to determine the associated PWM channel. maxItems: 1 =20 + fan-shutdown-percent: + description: + PWM duty cycle in percent applied to the fan during shutdown. + minimum: 0 + maximum: 100 + required: - reg =20 @@ -80,12 +86,14 @@ examples: fan@0 { reg =3D <0x0>; pwms =3D <&fan_controller 26000 PWM_POLARITY_INVERTED 1>; + fan-shutdown-percent =3D <100>; #cooling-cells =3D <2>; }; =20 fan@1 { reg =3D <0x1>; pwms =3D <&fan_controller 26000 0 1>; + fan-shutdown-percent =3D <50>; #cooling-cells =3D <2>; }; =20 --=20 2.34.1