HID: steelseries: export model and manufacturer

Export model and manufacturer with the power supply properties.
This helps identifing the device in the battery overview.
In the case of the Arctis 9 headset, the manufacturer is prefixed twice in
the device name.

Signed-off-by: Christian Mayer <git@mayer-bgk.de>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Author: mayer-ch

drivers/hid/hid-steelseries.c

@@ -439,6 +439,9 @@ static void steelseries_headset_battery_timer_tick(struct work_struct *work)
 	steelseries_headset_fetch_battery(hdev);
 }
 
+#define STEELSERIES_PREFIX "SteelSeries "
+#define STEELSERIES_PREFIX_LEN strlen(STEELSERIES_PREFIX)
+
 static int steelseries_headset_battery_get_property(struct power_supply *psy,
 				enum power_supply_property psp,
 				union power_supply_propval *val)
@@ -447,6 +450,14 @@ static int steelseries_headset_battery_get_property(struct power_supply *psy,
 	int ret = 0;
 
 	switch (psp) {
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = sd->hdev->name;
+		while (!strncmp(val->strval, STEELSERIES_PREFIX, STEELSERIES_PREFIX_LEN))
+			val->strval += STEELSERIES_PREFIX_LEN;
+		break;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = "SteelSeries";
+		break;
 	case POWER_SUPPLY_PROP_PRESENT:
 		val->intval = 1;
 		break;
@@ -490,6 +501,8 @@ steelseries_headset_set_wireless_status(struct hid_device *hdev,
 }
 
 static enum power_supply_property steelseries_headset_battery_props[] = {
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_MANUFACTURER,
 	POWER_SUPPLY_PROP_PRESENT,
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_SCOPE,