#ifndef __LINUX_PWM_H
  #define __LINUX_PWM_H
  
  struct pwm_device;
  
  /*
   * pwm_request - request a PWM device
   */
  struct pwm_device *pwm_request(int pwm_id, const char *label);
  
  /*
   * pwm_free - free a PWM device
   */
  void pwm_free(struct pwm_device *pwm);
  
  /*
   * pwm_config - change a PWM device configuration
   */
  int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns);
  
  /*
   * pwm_enable - start a PWM output toggling
   */
  int pwm_enable(struct pwm_device *pwm);
  
  /*
   * pwm_disable - stop a PWM output toggling
   */
  void pwm_disable(struct pwm_device *pwm);

  #endif /* __LINUX_PWM_H */