Documentation/hwmon/nct6775.rst

106 There are 4 to 5 fan rotation speed sensors, 8 to 15 analog voltage sensors,
108 fan regulation strategies (plus manual fan control mode).
119 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
121 NCT6775F, fan readings can be divided by a programmable divider (1, 2, 4, 8,
123 do not have a fan speed divider. The driver sets the most suitable fan divisor
124 itself; specifically, it increases the divider value each time a fan speed
125 reading returns an invalid value, and it reduces it if the fan speed reading
133 The driver supports automatic fan control mode known as Thermal Cruise.
135 predefined temperature range. If the temperature goes out of range, fan
144     - this file stores PWM duty cycle or DC value (fan speed) in range:
149     - this file controls mode of fan/temperature control:
151 	* 0 Fan control disabled (fans set to maximum speed)
154 	* 3 "Fan Speed Cruise" mode
155 	* 4 "Smart Fan III" mode (NCT6775F only)
156 	* 5 "Smart Fan IV" mode
164 Common fan control attributes
206 There are no changes to fan speed. Once the temperature leaves the interval, fan
212 			fan pwm start value (range 1 - 255), to start fan
216 			lowest fan pwm (range 0 - 255) if temperature is below
217 			the defined range. If set to 0, the fan is expected to
221 			milliseconds before fan speed is increased
224 			milliseconds before fan speed is decreased
228 			corresponding fan off (when the temperature was below
234 This modes tries to keep the fan speed constant.
236 fan[1-7]_target
237 			Target fan speed
239 fan[1-7]_tolerance
245 Smart Fan IV mode (5)
248 This mode offers multiple slopes to control the fan speed. The slopes can be
253 higher fan speeds with increasing temperature. The last data point reflects
271 			milliseconds before fan speed is increased
274 			milliseconds before fan speed is decreased