69  * @prescale: MTU3 prescale
79 	u8 prescale[RZ_MTU3_MAX_HW_CHANNELS];  member
116 	u8 prescale;  in rz_mtu3_pwm_calculate_prescale()  local
119 	 * Supported prescale values are 1, 4, 16 and 64.  in rz_mtu3_pwm_calculate_prescale()
120 	 * TODO: Support prescale values 2, 8, 32, 256 and 1024.  in rz_mtu3_pwm_calculate_prescale()
124 		prescale = 3;  in rz_mtu3_pwm_calculate_prescale()
126 		prescale = (fls(prescaled_period_cycles) + 1) / 2;  in rz_mtu3_pwm_calculate_prescale()
128 	return prescale;  in rz_mtu3_pwm_calculate_prescale()
282 		u8 prescale, val;  in rz_mtu3_pwm_get_state()  local
295 		prescale = FIELD_GET(RZ_MTU3_TCR_TPCS, val);  in rz_mtu3_pwm_get_state()
297 		/* With prescale <= 7 and pv <= 0xffff this doesn't overflow. */  in rz_mtu3_pwm_get_state()
298 		tmp = NSEC_PER_SEC * (u64)pv << (2 * prescale);  in rz_mtu3_pwm_get_state()
300 		tmp = NSEC_PER_SEC * (u64)dc << (2 * prescale);  in rz_mtu3_pwm_get_state()
313 static u16 rz_mtu3_pwm_calculate_pv_or_dc(u64 period_or_duty_cycle, u8 prescale)  in rz_mtu3_pwm_calculate_pv_or_dc()  argument
315 	return min(period_or_duty_cycle >> (2 * prescale), (u64)U16_MAX);  in rz_mtu3_pwm_calculate_pv_or_dc()
325 	u8 prescale;  in rz_mtu3_pwm_config()  local
335 	prescale = rz_mtu3_pwm_calculate_prescale(rz_mtu3_pwm, period_cycles);  in rz_mtu3_pwm_config()
338 	 * Prescalar is shared by multiple channels, so prescale can  in rz_mtu3_pwm_config()
341 	 * it, if current prescale value is less than the one we want to set.  in rz_mtu3_pwm_config()
344 		if (rz_mtu3_pwm->prescale[ch] > prescale)  in rz_mtu3_pwm_config()
347 		prescale = rz_mtu3_pwm->prescale[ch];  in rz_mtu3_pwm_config()
350 	pv = rz_mtu3_pwm_calculate_pv_or_dc(period_cycles, prescale);  in rz_mtu3_pwm_config()
354 	dc = rz_mtu3_pwm_calculate_pv_or_dc(duty_cycles, prescale);  in rz_mtu3_pwm_config()
368 	val = RZ_MTU3_TCR_CKEG_RISING | prescale;  in rz_mtu3_pwm_config()
371 	if (rz_mtu3_pwm->prescale[ch] != prescale && rz_mtu3_pwm->enable_count[ch])  in rz_mtu3_pwm_config()
386 	if (rz_mtu3_pwm->prescale[ch] != prescale) {  in rz_mtu3_pwm_config()
392 		rz_mtu3_pwm->prescale[ch] = prescale;  in rz_mtu3_pwm_config()