power: bq25890: implement CHARGE_TYPE property

Report charging type based on recently read state.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/bq25890_charger.c

@@ -427,6 +427,18 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
 
 		break;
 
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		if (!state.online || state.chrg_status == STATUS_NOT_CHARGING ||
+		    state.chrg_status == STATUS_TERMINATION_DONE)
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		else if (state.chrg_status == STATUS_PRE_CHARGING)
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
+		else if (state.chrg_status == STATUS_FAST_CHARGING)
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		else /* unreachable */
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+		break;
+
 	case POWER_SUPPLY_PROP_MANUFACTURER:
 		val->strval = BQ25890_MANUFACTURER;
 		break;
@@ -668,6 +680,7 @@ static const enum power_supply_property bq25890_power_supply_props[] = {
 	POWER_SUPPLY_PROP_MANUFACTURER,
 	POWER_SUPPLY_PROP_MODEL_NAME,
 	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
 	POWER_SUPPLY_PROP_ONLINE,
 	POWER_SUPPLY_PROP_HEALTH,
 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,