23  * 2) Changes to prescale, duty, period, and polarity do not take effect until
105 	unsigned long prescale = PRESCALE_MIN, pc, dc;  in kona_pwmc_config()  local
109 	 * Find period count, duty count and prescale to suit duty_ns and  in kona_pwmc_config()
112 	 * period_ns = 10^9 * (PRESCALE + 1) * PC / PWM_CLK_RATE  in kona_pwmc_config()
113 	 * duty_ns = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE  in kona_pwmc_config()
115 	 * PC = (PWM_CLK_RATE * period_ns) / (10^9 * (PRESCALE + 1))  in kona_pwmc_config()
116 	 * DC = (PWM_CLK_RATE * duty_ns) / (10^9 * (PRESCALE + 1))  in kona_pwmc_config()
123 		div *= 1 + prescale;  in kona_pwmc_config()
135 		/* Otherwise, increase prescale and recalculate pc and dc */  in kona_pwmc_config()
136 		if (++prescale > PRESCALE_MAX)  in kona_pwmc_config()
144 	value |= prescale << PRESCALE_SHIFT(chan);  in kona_pwmc_config()
214 	/* Set prescale to 0 for this channel */  in kona_pwmc_disable()