[PATCH v6 5/5] iio: adc: ad7949: use devm managed functions

[Liam Beguin <liambeguin@gmail.com>]

From: Liam Beguin <lvb@xiphos.com>

Switch to devm_iio_device_register to finalize devm migration.
This removes the use for iio_device_unregister() and since
mutex_destroy() is not necessary here, remove it altogether.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
---
 drivers/iio/adc/ad7949.c | 25 +++----------------------
 1 file changed, 3 insertions(+), 22 deletions(-)

diff --git a/drivers/iio/adc/ad7949.c b/drivers/iio/adc/ad7949.c
index 5168d687687d..5b8858719b53 100644
--- a/drivers/iio/adc/ad7949.c
+++ b/drivers/iio/adc/ad7949.c
@@ -405,34 +405,16 @@ static int ad7949_spi_probe(struct spi_device *spi)
 	ret = ad7949_spi_init(ad7949_adc);
 	if (ret) {
 		dev_err(dev, "enable to init this device: %d\n", ret);
-		goto err;
+		return ret;
 	}
 
-	ret = iio_device_register(indio_dev);
-	if (ret) {
+	ret = devm_iio_device_register(dev, indio_dev);
+	if (ret)
 		dev_err(dev, "fail to register iio device: %d\n", ret);
-		goto err;
-	}
-
-	return 0;
-
-err:
-	mutex_destroy(&ad7949_adc->lock);
 
 	return ret;
 }
 
-static int ad7949_spi_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct ad7949_adc_chip *ad7949_adc = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-	mutex_destroy(&ad7949_adc->lock);
-
-	return 0;
-}
-
 static const struct of_device_id ad7949_spi_of_id[] = {
 	{ .compatible = "adi,ad7949" },
 	{ .compatible = "adi,ad7682" },
@@ -455,7 +437,6 @@ static struct spi_driver ad7949_spi_driver = {
 		.of_match_table	= ad7949_spi_of_id,
 	},
 	.probe	  = ad7949_spi_probe,
-	.remove   = ad7949_spi_remove,
 	.id_table = ad7949_spi_id,
 };
 module_spi_driver(ad7949_spi_driver);
-- 
2.32.0.452.g940fe202adcb