Lines Matching refs:speed
5 and performs closed-loop or open-loop control of the fan speed. Two
24 fan1_target: set desired fan speed. This only makes sense in closed-loop
25 fan speed control (i.e. when pwm1_enable is set to 2).
42 pwm1_enable: set current fan speed control mode i.e. 1 for manual fan
43 speed control (open-loop) via pwm1 described below, 2 for
44 automatic fan speed control (closed-loop) via fan1_target
51 it run at full speed.
54 when current fan speed control mode is open-loop ('pwm1_enable' set to 1),
55 the fan speed is programmed by setting a value between 0 and 255 via 'pwm1'
56 entry (0 stops the fan, 255 makes it run at full speed). In closed-loop mode
57 ('pwm1_enable' set to 2), the expected rotation speed in RPM can be passed to
58 the chip via 'fan1_target'. In closed-loop mode, the target speed is compared
59 with current speed (available via 'fan1_input') by the device and a feedback
60 is performed to match that target value. The fan speed value is computed