[PATCH 3/3] iio: adc: ad7124: Use devm_ managed calls for all of probe() + drop remove()

[Jonathan Cameron <jic23@kernel.org>]

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

As not many steps were not already devm_ managed, use
devm_add_action_or_reset() to handle the rest.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Cc: Alexandru Ardelean <ardeleanalex@gmail.com>
---
 drivers/iio/adc/ad7124.c | 53 ++++++++++++++++++----------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index 9c2401c5848e..deb166d2b645 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -719,6 +719,16 @@ static void ad7124_reg_disable(void *r)
 	regulator_disable(r);
 }
 
+static void ad7124_clk_disable(void *c)
+{
+	clk_disable_unprepare(c);
+}
+
+static void ad7124_buffer_cleanup(void *idev)
+{
+	ad_sd_cleanup_buffer_and_trigger(idev);
+}
+
 static int ad7124_probe(struct spi_device *spi)
 {
 	const struct ad7124_chip_info *info;
@@ -740,8 +750,6 @@ static int ad7124_probe(struct spi_device *spi)
 
 	ad_sd_init(&st->sd, indio_dev, spi, &ad7124_sigma_delta_info);
 
-	spi_set_drvdata(spi, indio_dev);
-
 	indio_dev->name = st->chip_info->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &ad7124_info;
@@ -779,48 +787,36 @@ static int ad7124_probe(struct spi_device *spi)
 	if (ret < 0)
 		return ret;
 
+	ret = devm_add_action_or_reset(&spi->dev, ad7124_clk_disable, st->mclk);
+	if (ret)
+		return ret;
+
 	ret = ad7124_soft_reset(st);
 	if (ret < 0)
-		goto error_clk_disable_unprepare;
+		return ret;
 
 	ret = ad7124_check_chip_id(st);
 	if (ret)
-		goto error_clk_disable_unprepare;
+		return ret;
 
 	ret = ad7124_setup(st);
 	if (ret < 0)
-		goto error_clk_disable_unprepare;
+		return ret;
 
 	ret = ad_sd_setup_buffer_and_trigger(indio_dev);
 	if (ret < 0)
-		goto error_clk_disable_unprepare;
-
-	ret = iio_device_register(indio_dev);
-	if (ret < 0) {
-		dev_err(&spi->dev, "Failed to register iio device\n");
-		goto error_remove_trigger;
-	}
+		return ret;
 
-	return 0;
+	ret = devm_add_action_or_reset(&spi->dev, ad7124_buffer_cleanup, indio_dev);
+	if (ret)
+		return ret;
 
-error_remove_trigger:
-	ad_sd_cleanup_buffer_and_trigger(indio_dev);
-error_clk_disable_unprepare:
-	clk_disable_unprepare(st->mclk);
+	ret = devm_iio_device_register(&spi->dev, indio_dev);
+	if (ret)
+		dev_err(&spi->dev, "Failed to register iio device\n");
 
 	return ret;
-}
 
-static int ad7124_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct ad7124_state *st = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-	ad_sd_cleanup_buffer_and_trigger(indio_dev);
-	clk_disable_unprepare(st->mclk);
-
-	return 0;
 }
 
 static const struct of_device_id ad7124_of_match[] = {
@@ -838,7 +834,6 @@ static struct spi_driver ad71124_driver = {
 		.of_match_table = ad7124_of_match,
 	},
 	.probe = ad7124_probe,
-	.remove	= ad7124_remove,
 };
 module_spi_driver(ad71124_driver);
 
-- 
2.31.1