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Groups > linux.kernel > #1469166
| From | Mike Looijmans <mike.looijmans@topic.nl> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 2/2] hwmon: (max6650) Add initial rpm target devicetree documentation |
| Date | 2016-08-24 10:20 +0200 |
| Message-ID | <s9BzH-80z-11@gated-at.bofh.it> (permalink) |
| References | <s9BzH-80z-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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
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[PATCH 2/2] hwmon: (max6650) Add initial rpm target devicetree documentation Mike Looijmans <mike.looijmans@topic.nl> - 2016-08-24 10:20 +0200
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