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-rw-r--r--Documentation/hwmon/sysfs-interface11
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface
index c6559f153589..83a698773ade 100644
--- a/Documentation/hwmon/sysfs-interface
+++ b/Documentation/hwmon/sysfs-interface
@@ -187,6 +187,17 @@ fan[1-*]_div Fan divisor.
187 Note that this is actually an internal clock divisor, which 187 Note that this is actually an internal clock divisor, which
188 affects the measurable speed range, not the read value. 188 affects the measurable speed range, not the read value.
189 189
190fan[1-*]_pulses Number of tachometer pulses per fan revolution.
191 Integer value, typically between 1 and 4.
192 RW
193 This value is a characteristic of the fan connected to the
194 device's input, so it has to be set in accordance with the fan
195 model.
196 Should only be created if the chip has a register to configure
197 the number of pulses. In the absence of such a register (and
198 thus attribute) the value assumed by all devices is 2 pulses
199 per fan revolution.
200
190fan[1-*]_target 201fan[1-*]_target
191 Desired fan speed 202 Desired fan speed
192 Unit: revolution/min (RPM) 203 Unit: revolution/min (RPM)