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: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jean Delvare <khali@linux-fr.org>
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@ -187,6 +187,17 @@ fan[1-*]_div Fan divisor.
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Note that this is actually an internal clock divisor, which
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Note that this is actually an internal clock divisor, which
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affects the measurable speed range, not the read value.
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affects the measurable speed range, not the read value.
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fan[1-*]_pulses Number of tachometer pulses per fan revolution.
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Integer value, typically between 1 and 4.
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RW
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This value is a characteristic of the fan connected to the
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device's input, so it has to be set in accordance with the fan
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model.
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Should only be created if the chip has a register to configure
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the number of pulses. In the absence of such a register (and
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thus attribute) the value assumed by all devices is 2 pulses
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per fan revolution.
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fan[1-*]_target
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fan[1-*]_target
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Desired fan speed
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Desired fan speed
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Unit: revolution/min (RPM)
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Unit: revolution/min (RPM)
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