linux-kernel - [PATCH] iio: accel: da311: convert probe to device-managed functions

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Date:   Wed, 30 Jun 2021 15:03:38 +0300
From:   Alexandru Ardelean <aardelean@...iqon.com>
To:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     jic23@...nel.org, Alexandru Ardelean <aardelean@...iqon.com>
Subject: [PATCH] iio: accel: da311: convert probe to device-managed functions

This is another simple conversion to device-managed functions, requiring
the use of devm_iio_device_register() and moving the disabling of the
device on a devm_add_action_or_reset() hook.

The i2c_set_clientdata() can be removed, as the PM functions can work with
just the device object, to obtain the i2c_client object.

Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
---
 drivers/iio/accel/da311.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/drivers/iio/accel/da311.c b/drivers/iio/accel/da311.c
index 92593a1cd1aa..04e13487e706 100644
--- a/drivers/iio/accel/da311.c
+++ b/drivers/iio/accel/da311.c
@@ -212,6 +212,11 @@ static const struct iio_info da311_info = {
 	.read_raw	= da311_read_raw,
 };
 
+static void da311_disable(void *client)
+{
+	da311_enable(client, false);
+}
+
 static int da311_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
@@ -229,7 +234,6 @@ static int da311_probe(struct i2c_client *client,
 
 	data = iio_priv(indio_dev);
 	data->client = client;
-	i2c_set_clientdata(client, indio_dev);
 
 	indio_dev->info = &da311_info;
 	indio_dev->name = "da311";
@@ -245,22 +249,11 @@ static int da311_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	ret = iio_device_register(indio_dev);
-	if (ret < 0) {
-		dev_err(&client->dev, "device_register failed\n");
-		da311_enable(client, false);
-	}
-
-	return ret;
-}
-
-static int da311_remove(struct i2c_client *client)
-{
-	struct iio_dev *indio_dev = i2c_get_clientdata(client);
-
-	iio_device_unregister(indio_dev);
+	ret = devm_add_action_or_reset(&client->dev, da311_disable, client);
+	if (ret)
+		return ret;
 
-	return da311_enable(client, false);
+	return devm_iio_device_register(&client->dev, indio_dev);
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -289,7 +282,6 @@ static struct i2c_driver da311_driver = {
 		.pm = &da311_pm_ops,
 	},
 	.probe		= da311_probe,
-	.remove		= da311_remove,
 	.id_table	= da311_i2c_id,
 };
 
-- 
2.31.1