linux-kernel - [PATCH v2] iio: light: si1145: Use device-managed APIs

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Message-Id: <20190729014301.13402-1-hslester96@gmail.com>
Date:   Mon, 29 Jul 2019 09:43:01 +0800
From:   Chuhong Yuan <hslester96@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chuhong Yuan <hslester96@...il.com>
Subject: [PATCH v2] iio: light: si1145: Use device-managed APIs

Use device-managed APIs to simplify the code.
The remove functions are redundant now and can
be deleted.

Signed-off-by: Chuhong Yuan <hslester96@...il.com>
---
Changes in v2:
  - Split v1 into two patches.
  - Use devm_iio_trigger_register in probe_trigger,
    delete redundant remove_trigger.
  - Return devm_iio_device_register directly as a
    minor optimization.

 drivers/iio/light/si1145.c | 42 +++++---------------------------------
 1 file changed, 5 insertions(+), 37 deletions(-)

diff --git a/drivers/iio/light/si1145.c b/drivers/iio/light/si1145.c
index 6579d2418814..982bba0c54e7 100644
--- a/drivers/iio/light/si1145.c
+++ b/drivers/iio/light/si1145.c
@@ -1261,7 +1261,7 @@ static int si1145_probe_trigger(struct iio_dev *indio_dev)
 		return ret;
 	}
 
-	ret = iio_trigger_register(trig);
+	ret = devm_iio_trigger_register(&client->dev, trig);
 	if (ret)
 		return ret;
 
@@ -1271,16 +1271,6 @@ static int si1145_probe_trigger(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static void si1145_remove_trigger(struct iio_dev *indio_dev)
-{
-	struct si1145_data *data = iio_priv(indio_dev);
-
-	if (data->trig) {
-		iio_trigger_unregister(data->trig);
-		data->trig = NULL;
-	}
-}
-
 static int si1145_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
@@ -1332,7 +1322,8 @@ static int si1145_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	ret = iio_triggered_buffer_setup(indio_dev, NULL,
+	ret = devm_iio_triggered_buffer_setup(&client->dev,
+		indio_dev, NULL,
 		si1145_trigger_handler, &si1145_buffer_setup_ops);
 	if (ret < 0)
 		return ret;
@@ -1340,23 +1331,12 @@ static int si1145_probe(struct i2c_client *client,
 	if (client->irq) {
 		ret = si1145_probe_trigger(indio_dev);
 		if (ret < 0)
-			goto error_free_buffer;
+			return ret;
 	} else {
 		dev_info(&client->dev, "no irq, using polling\n");
 	}
 
-	ret = iio_device_register(indio_dev);
-	if (ret < 0)
-		goto error_free_trigger;
-
-	return 0;
-
-error_free_trigger:
-	si1145_remove_trigger(indio_dev);
-error_free_buffer:
-	iio_triggered_buffer_cleanup(indio_dev);
-
-	return ret;
+	return devm_iio_device_register(&client->dev, indio_dev);
 }
 
 static const struct i2c_device_id si1145_ids[] = {
@@ -1371,23 +1351,11 @@ static const struct i2c_device_id si1145_ids[] = {
 };
 MODULE_DEVICE_TABLE(i2c, si1145_ids);
 
-static int si1145_remove(struct i2c_client *client)
-{
-	struct iio_dev *indio_dev = i2c_get_clientdata(client);
-
-	iio_device_unregister(indio_dev);
-	si1145_remove_trigger(indio_dev);
-	iio_triggered_buffer_cleanup(indio_dev);
-
-	return 0;
-}
-
 static struct i2c_driver si1145_driver = {
 	.driver = {
 		.name   = "si1145",
 	},
 	.probe  = si1145_probe,
-	.remove = si1145_remove,
 	.id_table = si1145_ids,
 };
 
-- 
2.20.1