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Commit f9f8b33d authored by Mike Looijmans's avatar Mike Looijmans Committed by Guenter Roeck
Browse files

hwmon: (max6650) Add initial rpm target devicetree documentation 



Add devicetree property for early initialization of the fan controller
to prevent overheating, for example when resetting the board while the
fan was completely turned off.

Signed-off-by: default avatarMike Looijmans <mike.looijmans@topic.nl>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 20005cc5

Documentation/devicetree/bindings/hwmon/max6650.txt

+5 −0
Original line number Diff line number Diff line
@@ -13,6 +13,10 @@ Optional properties, default is to retain the chip's current setting: 
- maxim,fan-prescale  : Pre-scaling value, as per datasheet [1]. Lower values

			allow more fine-grained control of slower fans.

			Valid: 1, 2, 4, 8, 16.

- maxim,fan-target-rpm: Initial requested fan rotation speed. If specified, the

			driver selects closed-loop mode and the requested speed.

			This ensures the fan is already running before userspace

			takes over.



Example:

	fan-max6650: max6650@1b {
@@ -20,4 +24,5 @@ Example: 
		compatible = "maxim,max6650";

		maxim,fan-microvolt = <12000000>;

		maxim,fan-prescale = <4>;

		maxim,fan-target-rpm = <1200>;

	};