[PATCH 5/5] iio: adc: da9150-gpadc: convert probe to full-device managed

Alexandru Ardelean
2021-09-03T07:29:42Z

This change converts the probe of this driver to use device-managed
functions only, which means that the remove hook can be removed.
The remove hook has only 2 calls to iio_device_unregister() and
iio_map_array_unregister(). Both these can now be done via devm register
functions, now that there's also a devm_iio_map_array_register() function.

The platform_set_drvdata() can also be removed now.

This change also removes the error print for when the iio_device_register()
call fails. This isn't required now.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
---
drivers/iio/adc/da9150-gpadc.c | 27 ++-------------------------
1 file changed, 2 insertions(+), 25 deletions(-)

diff --git a/drivers/iio/adc/da9150-gpadc.c b/drivers/iio/adc/da9150-gpadc.c
index 7a7a54a7ed76..8f0d3fb63b67 100644
--- a/drivers/iio/adc/da9150-gpadc.c
+++ b/drivers/iio/adc/da9150-gpadc.c
@@ -330,7 +330,6 @@ static int da9150_gpadc_probe(struct platform_device *pdev)
}
gpadc = iio_priv(indio_dev);

- platform_set_drvdata(pdev, indio_dev);
gpadc->da9150 = da9150;
gpadc->dev = dev;
mutex_init(&gpadc->lock);
@@ -347,7 +346,7 @@ static int da9150_gpadc_probe(struct platform_device *pdev)
return ret;
}

- ret = iio_map_array_register(indio_dev, da9150_gpadc_default_maps);
+ ret = devm_iio_map_array_register(&pdev->dev, indio_dev, da9150_gpadc_default_maps);
if (ret) {
dev_err(dev, "Failed to register IIO maps: %d\n", ret);
return ret;
@@ -359,28 +358,7 @@ static int da9150_gpadc_probe(struct platform_device *pdev)
indio_dev->channels = da9150_gpadc_channels;
indio_dev->num_channels = ARRAY_SIZE(da9150_gpadc_channels);

- ret = iio_device_register(indio_dev);
- if (ret) {
- dev_err(dev, "Failed to register IIO device: %d\n", ret);
- goto iio_map_unreg;
- }
-
- return 0;
-
-iio_map_unreg:
- iio_map_array_unregister(indio_dev);
-
- return ret;
-}
-
-static int da9150_gpadc_remove(struct platform_device *pdev)
-{
- struct iio_dev *indio_dev = platform_get_drvdata(pdev);
-
- iio_device_unregister(indio_dev);
- iio_map_array_unregister(indio_dev);
-
- return 0;
+ return devm_iio_device_register(&pdev->dev, indio_dev);
}

static struct platform_driver da9150_gpadc_driver = {
@@ -388,7 +366,6 @@ static struct platform_driver da9150_gpadc_driver = {
.name = "da9150-gpadc",
},
.probe = da9150_gpadc_probe,
- .remove = da9150_gpadc_remove,
};

module_platform_driver(da9150_gpadc_driver);
--
2.31.1