Charger has only one valid property - ONLINE. If the property is not
ONLINE, then just return quickly.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
 {
        struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
 
-       if (psp == POWER_SUPPLY_PROP_ONLINE)
-               val->intval = lp8727_is_charger_attached(psy->name,
-                                                        pchg->devid);
+       if (psp != POWER_SUPPLY_PROP_ONLINE)
+               return -EINVAL;
+
+       val->intval = lp8727_is_charger_attached(psy->name, pchg->devid);
 
        return 0;
 }