diff options
| author | Florin Leotescu <florin.leotescu@nxp.com> | 2026-04-29 09:59:54 +0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2026-06-09 18:22:57 +0300 |
| commit | d37276a86e40a6f6479745a8fb4e92d0dd77c82a (patch) | |
| tree | 6294298100177424fc783e7a01122165bdc09a74 | |
| parent | ee672fef23722f71d7bfa7d5a7f5822b1ca6cfa3 (diff) | |
| download | linux-d37276a86e40a6f6479745a8fb4e92d0dd77c82a.tar.xz | |
dt-bindings: hwmon: emc2305: Add fan-shutdown-percent property
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 PWM duty cycle applied during shutdown to be configured
per fan output.
Signed-off-by: Florin Leotescu <florin.leotescu@nxp.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20260429065955.2113012-3-florin.leotescu@oss.nxp.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| -rw-r--r-- | Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml | 8 |
1 files changed, 8 insertions, 0 deletions
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 + fan-shutdown-percent: + description: + PWM duty cycle in percent applied to the fan during shutdown. + minimum: 0 + maximum: 100 + required: - reg @@ -80,12 +86,14 @@ examples: fan@0 { reg = <0x0>; pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>; + fan-shutdown-percent = <100>; #cooling-cells = <2>; }; fan@1 { reg = <0x1>; pwms = <&fan_controller 26000 0 1>; + fan-shutdown-percent = <50>; #cooling-cells = <2>; }; |