mfd: ab8500: Use power_supply_*() API for accessing function attrs

Replace direct calls to power supply function attributes with wrappers.
Wrappers provide safe access in case of unregistering the power
supply (e.g. by removing the driver). Replace:
 - get_property -> power_supply_get_property

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Acked-by: Jonghwa Lee <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Acked-by: Lee Jones <[email protected]>
Reviewed-by: Bartlomiej Zolnierkiewicz <[email protected]>
Reviewed-by: Sebastian Reichel <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>

Author: krzk

drivers/mfd/ab8500-sysctrl.c

@@ -49,7 +49,8 @@ static void ab8500_power_off(void)
 		if (!psy)
 			continue;
 
-		ret = psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &val);
+		ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
+				&val);
 
 		if (!ret && val.intval) {
 			charger_present = true;
@@ -63,8 +64,8 @@ static void ab8500_power_off(void)
 	/* Check if battery is known */
 	psy = power_supply_get_by_name("ab8500_btemp");
 	if (psy) {
-		ret = psy->get_property(psy, POWER_SUPPLY_PROP_TECHNOLOGY,
-					&val);
+		ret = power_supply_get_property(psy,
+				POWER_SUPPLY_PROP_TECHNOLOGY, &val);
 		if (!ret && val.intval != POWER_SUPPLY_TECHNOLOGY_UNKNOWN) {
 			printk(KERN_INFO
 			       "Charger \"%s\" is connected with known battery."