power: supply: cw2015: Use device managed API to simplify the code

Use devm_delayed_work_autocancel() instead of the INIT_DELAYED_WORK() to
remove the cw_bat_remove() function.

And power_supply_put_battery_info() can also be removed because the
power_supply_get_battery_info() uses device managed memory allocation.
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/supply/cw2015_battery.c

@@ -21,6 +21,7 @@
 #include <linux/regmap.h>
 #include <linux/time.h>
 #include <linux/workqueue.h>
+#include <linux/devm-helpers.h>
 
 #define CW2015_SIZE_BATINFO		64
 
@@ -698,7 +699,8 @@ static int cw_bat_probe(struct i2c_client *client)
 	}
 
 	cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery");
-	INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work);
+	devm_delayed_work_autocancel(&client->dev,
+							  &cw_bat->battery_delay_work, cw_bat_work);
 	queue_delayed_work(cw_bat->battery_workqueue,
 			   &cw_bat->battery_delay_work, msecs_to_jiffies(10));
 	return 0;
@@ -725,15 +727,6 @@ static int __maybe_unused cw_bat_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume);
 
-static int cw_bat_remove(struct i2c_client *client)
-{
-	struct cw_battery *cw_bat = i2c_get_clientdata(client);
-
-	cancel_delayed_work_sync(&cw_bat->battery_delay_work);
-	power_supply_put_battery_info(cw_bat->rk_bat, cw_bat->battery);
-	return 0;
-}
-
 static const struct i2c_device_id cw_bat_id_table[] = {
 	{ "cw2015", 0 },
 	{ }
@@ -752,7 +745,6 @@ static struct i2c_driver cw_bat_driver = {
 		.pm = &cw_bat_pm_ops,
 	},
 	.probe_new = cw_bat_probe,
-	.remove = cw_bat_remove,
 	.id_table = cw_bat_id_table,
 };