SL28CPLD_PWM_MAX_DUTY_CYCLE
cycle = min_t(unsigned int, cycle, SL28CPLD_PWM_MAX_DUTY_CYCLE(prescaler));
if (cycle == SL28CPLD_PWM_MAX_DUTY_CYCLE(0)) {
cycle = SL28CPLD_PWM_MAX_DUTY_CYCLE(1);
(NSEC_PER_SEC / SL28CPLD_PWM_CLK * SL28CPLD_PWM_MAX_DUTY_CYCLE(prescaler))