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-rw-r--r--Documentation/hwmon/sysfs-interface7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface
index d73d2e8c7534..a9a18ad0d17a 100644
--- a/Documentation/hwmon/sysfs-interface
+++ b/Documentation/hwmon/sysfs-interface
@@ -152,6 +152,13 @@ fan[1-*]_div	Fan divisor.
 		Note that this is actually an internal clock divisor, which
 		affects the measurable speed range, not the read value.
 
+fan[1-*]_target
+		Desired fan speed
+		Unit: revolution/min (RPM)
+		RW
+		Only makes sense if the chip supports closed-loop fan speed
+		control based on the measured fan speed.
+
 Also see the Alarms section for status flags associated with fans.