198 	/* prescaler: fit timeout window provided by upper layer */  in stm32_pwm_capture()
228 	 * - decrease counter clock prescaler, scale up to max rate.  in stm32_pwm_capture()
229 	 * - use input prescaler, capture once every /2 /4 or /8 edges.  in stm32_pwm_capture()
254 		/* input prescaler: also keep arbitrary margin */  in stm32_pwm_capture()
264 	/* Last chance to improve period accuracy, using input prescaler */  in stm32_pwm_capture()
277 		 * We may fall here using input prescaler, when input  in stm32_pwm_capture()
326 	unsigned int prescaler = 0;  in stm32_pwm_config()  local
329 	/* Period and prescaler values depends on clock rate */  in stm32_pwm_config()
336 		prescaler++;  in stm32_pwm_config()
338 		do_div(div, prescaler + 1);  in stm32_pwm_config()
343 	if (prescaler > MAX_TIM_PSC)  in stm32_pwm_config()
347 	 * All channels share the same prescaler and counter so when two  in stm32_pwm_config()
356 		if ((psc != prescaler) || (arr != prd - 1))  in stm32_pwm_config()
360 	regmap_write(priv->regmap, TIM_PSC, prescaler);  in stm32_pwm_config()
477 	/* protect common prescaler for all active channels */  in stm32_pwm_apply_locked()