linux-kernel - [PATCH] iio: ad7266: convert probe to full device-managed

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Date:   Wed, 6 Apr 2022 09:29:04 -0300
From:   Maíra Canal <maira.canal@....br>
To:     lars@...afoo.de, Michael.Hennerich@...log.com, jic23@...nel.org,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] iio: ad7266: convert probe to full device-managed

Convert probe functions to device-managed variants, with exception of
the regulator, which required a devm_add_action_or_reset() hook
registration.

Signed-off-by: Maíra Canal <maira.canal@....br>
---
 drivers/iio/adc/ad7266.c | 43 +++++++++++++---------------------------
 1 file changed, 14 insertions(+), 29 deletions(-)

diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index c17d9b5fbaf6..4f8f07d5c1a3 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -378,6 +378,11 @@ static const char * const ad7266_gpio_labels[] = {
 	"ad0", "ad1", "ad2",
 };
 
+static void ad7266_reg_disable(void *reg)
+{
+	regulator_disable(reg);
+}
+
 static int ad7266_probe(struct spi_device *spi)
 {
 	struct ad7266_platform_data *pdata = spi->dev.platform_data;
@@ -398,9 +403,13 @@ static int ad7266_probe(struct spi_device *spi)
 		if (ret)
 			return ret;
 
+		ret = devm_add_action_or_reset(&spi->dev, ad7266_reg_disable, st->reg);
+		if (ret)
+			return ret;
+
 		ret = regulator_get_voltage(st->reg);
 		if (ret < 0)
-			goto error_disable_reg;
+			return ret;
 
 		st->vref_mv = ret / 1000;
 	} else {
@@ -423,7 +432,7 @@ static int ad7266_probe(struct spi_device *spi)
 						      GPIOD_OUT_LOW);
 				if (IS_ERR(st->gpios[i])) {
 					ret = PTR_ERR(st->gpios[i]);
-					goto error_disable_reg;
+					return ret;
 				}
 			}
 		}
@@ -459,35 +468,12 @@ static int ad7266_probe(struct spi_device *spi)
 	spi_message_add_tail(&st->single_xfer[1], &st->single_msg);
 	spi_message_add_tail(&st->single_xfer[2], &st->single_msg);
 
-	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, &iio_pollfunc_store_time,
 		&ad7266_trigger_handler, &iio_triggered_buffer_setup_ops);
 	if (ret)
-		goto error_disable_reg;
-
-	ret = iio_device_register(indio_dev);
-	if (ret)
-		goto error_buffer_cleanup;
-
-	return 0;
-
-error_buffer_cleanup:
-	iio_triggered_buffer_cleanup(indio_dev);
-error_disable_reg:
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
-
-	return ret;
-}
-
-static void ad7266_remove(struct spi_device *spi)
-{
-	struct iio_dev *indio_dev = spi_get_drvdata(spi);
-	struct ad7266_state *st = iio_priv(indio_dev);
+		return ret;
 
-	iio_device_unregister(indio_dev);
-	iio_triggered_buffer_cleanup(indio_dev);
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
+	return devm_iio_device_register(&spi->dev, indio_dev);
 }
 
 static const struct spi_device_id ad7266_id[] = {
@@ -502,7 +488,6 @@ static struct spi_driver ad7266_driver = {
 		.name	= "ad7266",
 	},
 	.probe		= ad7266_probe,
-	.remove		= ad7266_remove,
 	.id_table	= ad7266_id,
 };
 module_spi_driver(ad7266_driver);
-- 
2.35.1