25  * - The hardware cannot generate a 100% duty cycle if the prescaler is 0.
30  * - The duty cycle will switch immediately and not after a complete cycle.
59  * We calculate the duty cycle like this:
124 	unsigned int cycle, prescaler;  in sl28cpld_pwm_apply()  local
147 	cycle = SL28CPLD_PWM_FROM_DUTY_CYCLE(state->duty_cycle);  in sl28cpld_pwm_apply()
148 	cycle = min_t(unsigned int, cycle, SL28CPLD_PWM_MAX_DUTY_CYCLE(prescaler));  in sl28cpld_pwm_apply()
152 	 * cycle if the prescaler is 0. Set prescaler to 1 instead. We don't  in sl28cpld_pwm_apply()
158 	if (cycle == SL28CPLD_PWM_MAX_DUTY_CYCLE(0)) {  in sl28cpld_pwm_apply()
161 		cycle = SL28CPLD_PWM_MAX_DUTY_CYCLE(1);  in sl28cpld_pwm_apply()
166 	 * we have a valid duty cycle for the new mode.  in sl28cpld_pwm_apply()
169 	 * account to decide whether we have to write the duty cycle or the new  in sl28cpld_pwm_apply()
171 	 * write the duty cycle first.  in sl28cpld_pwm_apply()
176 		ret = sl28cpld_pwm_write(priv, SL28CPLD_PWM_CYCLE, cycle);  in sl28cpld_pwm_apply()
186 		ret = sl28cpld_pwm_write(priv, SL28CPLD_PWM_CYCLE, cycle);  in sl28cpld_pwm_apply()