364 static int ptp_clock_e1000_rate_adjust(const struct device *dev, double ratio)  in ptp_clock_e1000_rate_adjust()  argument
374 	if (ratio == 1.0) {  in ptp_clock_e1000_rate_adjust()
378 	ratio *= context->clk_ratio;  in ptp_clock_e1000_rate_adjust()
380 	/* Limit possible ratio. */  in ptp_clock_e1000_rate_adjust()
381 	if ((ratio > 1.0 + 1.0/(2.0 * hw_inc)) ||  in ptp_clock_e1000_rate_adjust()
382 			(ratio < 1.0 - 1.0/(2.0 * hw_inc))) {  in ptp_clock_e1000_rate_adjust()
386 	/* Save new ratio. */  in ptp_clock_e1000_rate_adjust()
387 	context->clk_ratio = ratio;  in ptp_clock_e1000_rate_adjust()
389 	if (ratio < 1.0) {  in ptp_clock_e1000_rate_adjust()
391 		val = 1.0 / (hw_inc * (1.0 - ratio));  in ptp_clock_e1000_rate_adjust()
392 	} else if (ratio > 1.0) {  in ptp_clock_e1000_rate_adjust()
394 		val = 1.0 / (hw_inc * (ratio - 1.0));  in ptp_clock_e1000_rate_adjust()