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: Mike Looijmans <[email protected]> --- Documentation/devicetree/bindings/hwmon/max6650.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/max6650.txt b/Documentation/devicetree/bindings/hwmon/max6650.txt index d6c10e3..f6bd87d 100644 --- a/Documentation/devicetree/bindings/hwmon/max6650.txt +++ b/Documentation/devicetree/bindings/hwmon/max6650.txt @@ -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>; }; -- 1.9.1
