linux/Documentation/hwmon/pwm-fan
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   1Kernel driver pwm-fan
   2=====================
   3
   4This driver enables the use of a PWM module to drive a fan. It uses the
   5generic PWM interface thus it is hardware independent. It can be used on
   6many SoCs, as long as the SoC supplies a PWM line driver that exposes
   7the generic PWM API.
   8
   9Author: Kamil Debski <k.debski@samsung.com>
  10
  11Description
  12-----------
  13
  14The driver implements a simple interface for driving a fan connected to
  15a PWM output. It uses the generic PWM interface, thus it can be used with
  16a range of SoCs. The driver exposes the fan to the user space through
  17the hwmon's sysfs interface.
  18