FEC_RS_MEASUREMENT_PERIOD
FEC_RS_MEASUREMENT_PERIOD, /* fec_rs_period */
rc = drxj_dap_write_reg16(dev_addr, FEC_RS_MEASUREMENT_PERIOD__A, FEC_RS_MEASUREMENT_PERIOD, 0);
period = FEC_RS_MEASUREMENT_PERIOD;
period = FEC_RS_MEASUREMENT_PERIOD;