AN8801_BPBUS_REG_EFIFO_CTL
ret = an8801_buckpbus_reg_write(phydev, AN8801_BPBUS_REG_EFIFO_CTL(0),
ret = an8801_buckpbus_reg_write(phydev, AN8801_BPBUS_REG_EFIFO_CTL(1),
ret = an8801_buckpbus_reg_write(phydev, AN8801_BPBUS_REG_EFIFO_CTL(2),