summaryrefslogtreecommitdiff
path: root/include/linux/iio
diff options
context:
space:
mode:
authorAlexandru Ardelean <alexandru.ardelean@analog.com>2020-06-03 14:40:19 +0300
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2020-06-14 13:49:57 +0300
commitf5d017938e7a6517b85f7fd215213a28e11291fb (patch)
treeab7554530515b5fdc44fd8980fd792afee0ce330 /include/linux/iio
parent78289b4a58b58e9a8a76ef43ffbaf04a097e33c6 (diff)
downloadlinux-f5d017938e7a6517b85f7fd215213a28e11291fb.tar.xz
iio: core: add iio_device_set_parent() helper
By default, the device allocation will also assign a parent device to the IIO device object. In cases where devm_iio_device_alloc() is used, sometimes the parent device must be different than the device used to manage the allocation. In that case, this helper should be used to change the parent, hence the requirement to call this between allocation & registration. This pattern/requirement is not very common in the IIO space, and it may be cleaned up later. But until then, assigning the parent manually between allocation & registration is slightly easier. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'include/linux/iio')
-rw-r--r--include/linux/iio/iio.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 655e34a08d94..1c1d02107722 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -649,6 +649,26 @@ static inline struct iio_dev *iio_device_get(struct iio_dev *indio_dev)
return indio_dev ? dev_to_iio_dev(get_device(&indio_dev->dev)) : NULL;
}
+/**
+ * iio_device_set_parent() - assign parent device to the IIO device object
+ * @indio_dev: IIO device structure
+ * @parent: reference to parent device object
+ *
+ * This utility must be called between IIO device allocation
+ * (via devm_iio_device_alloc()) & IIO device registration
+ * (via {devm_}iio_device_register()).
+ * By default, the device allocation will also assign a parent device to
+ * the IIO device object. In cases where devm_iio_device_alloc() is used,
+ * sometimes the parent device must be different than the device used to
+ * manage the allocation.
+ * In that case, this helper should be used to change the parent, hence the
+ * requirement to call this between allocation & registration.
+ **/
+static inline void iio_device_set_parent(struct iio_dev *indio_dev,
+ struct device *parent)
+{
+ indio_dev->dev.parent = parent;
+}
/**
* iio_device_set_drvdata() - Set device driver data