M41T80_SEC_ST
err = i2c_smbus_write_byte_data(client, M41T80_REG_SEC, M41T80_SEC_ST);
err = i2c_smbus_write_byte_data(client, M41T80_REG_SEC, flags & ~M41T80_SEC_ST);
if (rc >= 0 && rc & M41T80_SEC_ST)
rc & ~M41T80_SEC_ST);