Documentation/hwmon/pwm-fan.rst

1 Kernel driver pwm-fan
4 This driver enables the use of a PWM module to drive a fan. It uses the
12 -----------
14 The driver implements a simple interface for driving a fan connected to
16 a range of SoCs. The driver exposes the fan to the user space through
19 The fan rotation speed returned via the optional 'fan1_input' is extrapolated
25 fan1_input	ro	fan tachometer speed in RPM
26 pwm1_enable	rw	keep enable mode, defines behaviour when pwm1=0
27 			0 -> disable pwm and regulator
28 			1 -> enable pwm; if pwm==0, disable pwm, keep regulator enabled
29 			2 -> enable pwm; if pwm==0, keep pwm and regulator enabled
30 			3 -> enable pwm; if pwm==0, disable pwm and regulator
31 pwm1		rw	relative speed (0-255), 255=max. speed.