linux-kernel - [PATCH v3 1/2] iio: tsl2772: Use device-managed API

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Message-Id: <20190731030415.8062-1-hslester96@gmail.com>
Date:   Wed, 31 Jul 2019 11:04:15 +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>,
        Brian Masney <masneyb@...tation.org>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chuhong Yuan <hslester96@...il.com>
Subject: [PATCH v3 1/2] iio: tsl2772: Use device-managed API

Use devm_() APIs to simplify the code.

Signed-off-by: Chuhong Yuan <hslester96@...il.com>
---
Changes in v3:
  - Split v2 into two patches.

 drivers/iio/light/tsl2772.c | 36 +++++++++++++++---------------------
 1 file changed, 15 insertions(+), 21 deletions(-)

diff --git a/drivers/iio/light/tsl2772.c b/drivers/iio/light/tsl2772.c
index 83cece921843..f1134f183be7 100644
--- a/drivers/iio/light/tsl2772.c
+++ b/drivers/iio/light/tsl2772.c
@@ -860,6 +860,13 @@ static int tsl2772_chip_off(struct iio_dev *indio_dev)
 	return tsl2772_write_control_reg(chip, 0x00);
 }
 
+static void tsl2772_chip_off_action(void *data)
+{
+	struct iio_dev *indio_dev = data;
+
+	tsl2772_chip_off(indio_dev);
+}
+
 /**
  * tsl2772_invoke_change - power cycle the device to implement the user
  *                         parameters
@@ -1807,10 +1814,10 @@ static int tsl2772_probe(struct i2c_client *clientp,
 		return PTR_ERR(chip->vdd_supply);
 	}
 
-	ret = devm_add_action(&clientp->dev, tsl2772_disable_regulators_action,
+	ret = devm_add_action_or_reset(&clientp->dev,
+				tsl2772_disable_regulators_action,
 			      chip);
 	if (ret < 0) {
-		tsl2772_disable_regulators_action(chip);
 		dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n",
 			ret);
 		return ret;
@@ -1877,15 +1884,14 @@ static int tsl2772_probe(struct i2c_client *clientp,
 	if (ret < 0)
 		return ret;
 
-	ret = iio_device_register(indio_dev);
-	if (ret) {
-		tsl2772_chip_off(indio_dev);
-		dev_err(&clientp->dev,
-			"%s: iio registration failed\n", __func__);
+	ret = devm_add_action_or_reset(&clientp->dev,
+					tsl2772_chip_off_action,
+					indio_dev);
+
+	if (ret < 0)
 		return ret;
-	}
 
-	return 0;
+	return devm_iio_device_register(&clientp->dev, indio_dev);
 }
 
 static int tsl2772_suspend(struct device *dev)
@@ -1922,17 +1928,6 @@ static int tsl2772_resume(struct device *dev)
 	return tsl2772_chip_on(indio_dev);
 }
 
-static int tsl2772_remove(struct i2c_client *client)
-{
-	struct iio_dev *indio_dev = i2c_get_clientdata(client);
-
-	tsl2772_chip_off(indio_dev);
-
-	iio_device_unregister(indio_dev);
-
-	return 0;
-}
-
 static const struct i2c_device_id tsl2772_idtable[] = {
 	{ "tsl2571", tsl2571 },
 	{ "tsl2671", tsl2671 },
@@ -1979,7 +1974,6 @@ static struct i2c_driver tsl2772_driver = {
 	},
 	.id_table = tsl2772_idtable,
 	.probe = tsl2772_probe,
-	.remove = tsl2772_remove,
 };
 
 module_i2c_driver(tsl2772_driver);
-- 
2.20.1