[PATCH 4/5] iio: adc: cc10001: Use devm_ to call device power down.

From: Jonathan Cameron <jic23@kernel.org>
To: linux-iio@vger.kernel.org
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Subject: [PATCH 4/5] iio: adc: cc10001: Use devm_ to call device power down.
Date: Sun, 16 Oct 2022 18:09:49 +0100	[thread overview]
Message-ID: <20221016170950.387751-5-jic23@kernel.org> (raw)
In-Reply-To: <20221016170950.387751-1-jic23@kernel.org>

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

It is presumably safe to call the powerdown whether or not we are
in the commented shared state (the driver always did this).

The power down was previously out of order wrt to the probe() function
so move using devm_ will ensure it occurs after the userspace interfaces
are removed.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/cc10001_adc.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c
index 332f0e06369f..b0daaec7ff16 100644
--- a/drivers/iio/adc/cc10001_adc.c
+++ b/drivers/iio/adc/cc10001_adc.c
@@ -310,6 +310,11 @@ static void cc10001_reg_disable(void *priv)
 	regulator_disable(priv);
 }
 
+static void cc10001_pd_cb(void *priv)
+{
+	cc10001_adc_power_down(priv);
+}
+
 static int cc10001_adc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -375,6 +380,9 @@ static int cc10001_adc_probe(struct platform_device *pdev)
 	if (adc_dev->shared)
 		cc10001_adc_power_up(adc_dev);
 
+	ret = devm_add_action_or_reset(dev, cc10001_pd_cb, adc_dev);
+	if (ret)
+		return ret;
 	/* Setup the ADC channels available on the device */
 	ret = cc10001_adc_channel_init(indio_dev, channel_map);
 	if (ret < 0)
@@ -405,7 +413,6 @@ static int cc10001_adc_remove(struct platform_device *pdev)
 	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 	struct cc10001_adc_device *adc_dev = iio_priv(indio_dev);
 
-	cc10001_adc_power_down(adc_dev);
 	iio_device_unregister(indio_dev);
 	iio_triggered_buffer_cleanup(indio_dev);
 
-- 
2.37.2

