EC_BAT_STATUS
gaokun_ec_psy_read_byte(ecbat->ec, EC_BAT_STATUS, &charge);
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);