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iio: position: iqs624: remove usage of iio_priv_to_dev()

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We may want to get rid of the iio_priv_to_dev() helper. That's a bit
uncertain at this point. The reason is that we will hide some of the
members of the iio_dev structure (to prevent drivers from accessing them
directly), and that will also mean hiding the implementation of the
iio_priv_to_dev() helper inside the IIO core.

Hiding the implementation of iio_priv_to_dev() implies that some fast-paths
may not be fast anymore, so a general idea is to try to get rid of the
iio_priv_to_dev() altogether.

For this driver, removing iio_priv_to_dev() also means keeping a reference
on the state struct.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Acked-by: Jeff LaBundy <jeff@labundy.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean 2020-05-22 09:53:22 +03:00 committed by Jonathan Cameron
parent 6dc855647c
commit 4de87f45ce
1 changed files with 4 additions and 2 deletions
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6
drivers/iio/position/iqs624-pos.c
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@ -23,6 +23,7 @@
struct iqs624_pos_private {
struct iqs62x_core *iqs62x;
struct iio_dev *indio_dev;
struct notifier_block notifier;
struct mutex lock;
bool angle_en;
@ -59,7 +60,7 @@ static int iqs624_pos_notifier(struct notifier_block *notifier,
iqs624_pos = container_of(notifier, struct iqs624_pos_private,
notifier);
indio_dev = iio_priv_to_dev(iqs624_pos);
indio_dev = iqs624_pos->indio_dev;
timestamp = iio_get_time_ns(indio_dev);
iqs62x = iqs624_pos->iqs62x;
@ -98,7 +99,7 @@ static int iqs624_pos_notifier(struct notifier_block *notifier,
static void iqs624_pos_notifier_unregister(void *context)
{
struct iqs624_pos_private *iqs624_pos = context;
struct iio_dev *indio_dev = iio_priv_to_dev(iqs624_pos);
struct iio_dev *indio_dev = iqs624_pos->indio_dev;
int ret;
ret = blocking_notifier_chain_unregister(&iqs624_pos->iqs62x->nh,
@ -243,6 +244,7 @@ static int iqs624_pos_probe(struct platform_device *pdev)
iqs624_pos = iio_priv(indio_dev);
iqs624_pos->iqs62x = iqs62x;
iqs624_pos->indio_dev = indio_dev;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->dev.parent = &pdev->dev;