Loading Documentation/hwmon/nct6775 +69 −0 Original line number Diff line number Diff line Loading @@ -87,6 +87,75 @@ pwm[1-5]_mode - controls if output is PWM or DC level * 0 DC output * 1 PWM output Common fan control attributes ----------------------------- pwm[1-5]_temp_sel Temperature source. Value is temperature sensor index. For example, select '1' for temp1_input. Thermal Cruise mode (2) ----------------------- If the temperature is in the range defined by: pwm[1-5]_target_temp Target temperature, unit millidegree Celsius (range 0 - 127000) pwm[1-5]_temp_tolerance Target temperature tolerance, unit millidegree Celsius there are no changes to fan speed. Once the temperature leaves the interval, fan speed increases (if temperature is higher that desired) or decreases (if temperature is lower than desired), using the following limits and time intervals. pwm[1-5]_start fan pwm start value (range 1 - 255), to start fan when the temperature is above defined range. pwm[1-5]_floor lowest fan pwm (range 0 - 255) if temperature is below the defined range. If set to 0, the fan is expected to stop if the temperature is below the defined range. pwm[1-5]_step_up_time milliseconds before fan speed is increased pwm[1-5]_step_down_time milliseconds before fan speed is decreased pwm[1-5]_stop_time how many milliseconds must elapse to switch corresponding fan off (when the temperature was below defined range). Speed Cruise mode (3) --------------------- This modes tries to keep the fan speed constant. fan[1-5]_target Target fan speed fan[1-5]_tolerance Target speed tolerance Untested; use at your own risk. Smart Fan IV mode (5) --------------------- This mode offers multiple slopes to control the fan speed. The slopes can be controlled by setting the pwm and temperature attributes. When the temperature rises, the chip will calculate the DC/PWM output based on the current slope. There are up to seven data points depending on the chip type. Subsequent data points should be set to higher temperatures and higher pwm values to achieve higher fan speeds with increasing temperature. The last data point reflects critical temperature mode, in which the fans should run at full speed. pwm[1-5]_auto_point[1-7]_pwm pwm value to be set if temperature reaches matching temperature range. pwm[1-5]_auto_point[1-7]_temp Temperature over which the matching pwm is enabled. pwm[1-5]_temp_tolerance Temperature tolerance, unit millidegree Celsius pwm[1-5]_crit_temp_tolerance Temperature tolerance for critical temperature, unit millidegree Celsius pwm[1-5]_step_up_time milliseconds before fan speed is increased pwm[1-5]_step_down_time milliseconds before fan speed is decreased Usage Notes ----------- Loading Loading
Documentation/hwmon/nct6775 +69 −0 Original line number Diff line number Diff line Loading @@ -87,6 +87,75 @@ pwm[1-5]_mode - controls if output is PWM or DC level * 0 DC output * 1 PWM output Common fan control attributes ----------------------------- pwm[1-5]_temp_sel Temperature source. Value is temperature sensor index. For example, select '1' for temp1_input. Thermal Cruise mode (2) ----------------------- If the temperature is in the range defined by: pwm[1-5]_target_temp Target temperature, unit millidegree Celsius (range 0 - 127000) pwm[1-5]_temp_tolerance Target temperature tolerance, unit millidegree Celsius there are no changes to fan speed. Once the temperature leaves the interval, fan speed increases (if temperature is higher that desired) or decreases (if temperature is lower than desired), using the following limits and time intervals. pwm[1-5]_start fan pwm start value (range 1 - 255), to start fan when the temperature is above defined range. pwm[1-5]_floor lowest fan pwm (range 0 - 255) if temperature is below the defined range. If set to 0, the fan is expected to stop if the temperature is below the defined range. pwm[1-5]_step_up_time milliseconds before fan speed is increased pwm[1-5]_step_down_time milliseconds before fan speed is decreased pwm[1-5]_stop_time how many milliseconds must elapse to switch corresponding fan off (when the temperature was below defined range). Speed Cruise mode (3) --------------------- This modes tries to keep the fan speed constant. fan[1-5]_target Target fan speed fan[1-5]_tolerance Target speed tolerance Untested; use at your own risk. Smart Fan IV mode (5) --------------------- This mode offers multiple slopes to control the fan speed. The slopes can be controlled by setting the pwm and temperature attributes. When the temperature rises, the chip will calculate the DC/PWM output based on the current slope. There are up to seven data points depending on the chip type. Subsequent data points should be set to higher temperatures and higher pwm values to achieve higher fan speeds with increasing temperature. The last data point reflects critical temperature mode, in which the fans should run at full speed. pwm[1-5]_auto_point[1-7]_pwm pwm value to be set if temperature reaches matching temperature range. pwm[1-5]_auto_point[1-7]_temp Temperature over which the matching pwm is enabled. pwm[1-5]_temp_tolerance Temperature tolerance, unit millidegree Celsius pwm[1-5]_crit_temp_tolerance Temperature tolerance for critical temperature, unit millidegree Celsius pwm[1-5]_step_up_time milliseconds before fan speed is increased pwm[1-5]_step_down_time milliseconds before fan speed is decreased Usage Notes ----------- Loading
Guenter Roeck <linux@roeck-us.net>Guenter Roeck <linux@roeck-us.net>