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 <mike.looijmans@topic.nl>
---
 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