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Commit 2d2e148a authored by Guenter Roeck's avatar Guenter Roeck
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hwmon: Add tachometer pulses per fan revolution to sysfs ABI 



Some fan control chips support a configuration register to set the number of
tachometer pulses per fan revolution. Add an ABI attribute to support this
configuration register.

Signed-off-by: default avatarGuenter Roeck <guenter.roeck@ericsson.com>
Acked-by: default avatarJean Delvare <khali@linux-fr.org>
parent de779015

Documentation/hwmon/sysfs-interface

+11 −0
Original line number Diff line number Diff line
@@ -187,6 +187,17 @@ 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-*]_pulses	Number of tachometer pulses per fan revolution.

		Integer value, typically between 1 and 4.

		RW

		This value is a characteristic of the fan connected to the

		device's input, so it has to be set in accordance with the fan

		model.

		Should only be created if the chip has a register to configure

		the number of pulses. In the absence of such a register (and

		thus attribute) the value assumed by all devices is 2 pulses

		per fan revolution.



fan[1-*]_target

		Desired fan speed

		Unit: revolution/min (RPM)