static u32 filter_rx_s_min_width(struct cx23885_dev *dev, u32 min_width_ns)
{
	u32 count = ns_to_lpf_count(min_width_ns);
	cx23888_ir_write4(dev, CX23888_IR_FILTR_REG, count);
	return lpf_count_to_ns(count);
}