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dt-bindings: hwmon: pwm-fan: Document after shutdown fan settings 

Document fan-shutdown-percent property, used to describe fan RPM in percent
set during shutdown. This is used to keep the fan running at fixed RPM after
the kernel shut down, which is useful on hardware that does keep heating
itself even after the kernel did shut down, for example from some sort of
management core.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250904202157.170600-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Marek Vasut 2025-09-04 22:21:09 +02:00 committed by Guenter Roeck
parent 8702c8f53d
commit bd48b5a4e8
1 changed files with 9 additions and 0 deletions
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Documentation/devicetree/bindings/hwmon/pwm-fan.yaml
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@ -31,6 +31,15 @@ properties:
it must be self resetting edge interrupts.
maxItems: 1
fan-shutdown-percent:
description:
Fan RPM in percent set during shutdown. This is used to keep the fan
running at fixed RPM after the kernel shut down, which is useful on
hardware that does keep heating itself even after the kernel did shut
down, for example from some sort of management core.
minimum: 0
maximum: 100
fan-stop-to-start-percent:
description:
Minimum fan RPM in percent to start when stopped.