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From:   Chuhong Yuan <hslester96@gmail.com>
Cc:     Jonathan Cameron <jic23@kernel.org>,
        Hartmut Knaack <knaack.h@gmx.de>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
        linux-kernel@vger.kernel.org, Chuhong Yuan <hslester96@gmail.com>
Subject: [PATCH] iio: adc: max1027: Use device-managed APIs
Date:   Thu,  8 Aug 2019 22:26:46 +0800
Message-Id: <20190808142646.29567-1-hslester96@gmail.com>
MIME-Version: 1.0
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Sender: linux-kernel-owner@vger.kernel.org
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Use device-managed APIs to simplify the code.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
---
 drivers/iio/adc/max1027.c | 30 +++++++-----------------------
 1 file changed, 7 insertions(+), 23 deletions(-)

diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index da84adfdb819..f1b90c544b82 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -427,8 +427,9 @@ static int max1027_probe(struct spi_device *spi)
 		return -ENOMEM;
 	}
 
-	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
-					 &max1027_trigger_handler, NULL);
+	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
+					&iio_pollfunc_store_time,
+					&max1027_trigger_handler, NULL);
 	if (ret < 0) {
 		dev_err(&indio_dev->dev, "Failed to setup buffer\n");
 		return ret;
@@ -439,7 +440,7 @@ static int max1027_probe(struct spi_device *spi)
 	if (st->trig == NULL) {
 		ret = -ENOMEM;
 		dev_err(&indio_dev->dev, "Failed to allocate iio trigger\n");
-		goto fail_trigger_alloc;
+		return ret;
 	}
 
 	st->trig->ops = &max1027_trigger_ops;
@@ -454,7 +455,7 @@ static int max1027_probe(struct spi_device *spi)
 					spi->dev.driver->name, st->trig);
 	if (ret < 0) {
 		dev_err(&indio_dev->dev, "Failed to allocate IRQ.\n");
-		goto fail_dev_register;
+		return ret;
 	}
 
 	/* Disable averaging */
@@ -462,33 +463,16 @@ static int max1027_probe(struct spi_device *spi)
 	ret = spi_write(st->spi, &st->reg, 1);
 	if (ret < 0) {
 		dev_err(&indio_dev->dev, "Failed to configure averaging register\n");
-		goto fail_dev_register;
-	}
-
-	ret = iio_device_register(indio_dev);
-	if (ret < 0) {
-		dev_err(&indio_dev->dev, "Failed to register iio device\n");
-		goto fail_dev_register;
+		return ret;
 	}
 
-	return 0;
-
-fail_dev_register:
-fail_trigger_alloc:
-	iio_triggered_buffer_cleanup(indio_dev);
-
-	return ret;
+	return devm_iio_device_register(&spi->dev, indio_dev);
 }
 
 static int max1027_remove(struct spi_device *spi)
 {
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-
 	pr_debug("%s: remove(spi = 0x%p)\n", __func__, spi);
 
-	iio_device_unregister(indio_dev);
-	iio_triggered_buffer_cleanup(indio_dev);
-
 	return 0;
 }
 
-- 
2.20.1