sci_scbrr_calc
err = sci_scbrr_calc(s, baud, &brr1, &srr1, &cks1);
int sci_scbrr_calc(struct sci_port *s, unsigned int bps, unsigned int *brr,
EXPORT_SYMBOL_NS_GPL(sci_scbrr_calc, "SH_SCI");
err = sci_scbrr_calc(s, baud, &brr1, &srr1, &cks1);