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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2017-09-06 14:35:42 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-10-31 19:02:37 +0100 |
| commit | 7a9ec808ad46d1e02e5e766a83adc5f88e5df264 (patch) | |
| tree | f8c5b775148743444871a32f6790570d389fdd32 /include/media | |
| parent | media: v4l: fwnode: Add a helper function to obtain device / integer references (diff) | |
| download | linux-7a9ec808ad46d1e02e5e766a83adc5f88e5df264.tar.xz linux-7a9ec808ad46d1e02e5e766a83adc5f88e5df264.zip | |
media: v4l: fwnode: Add convenience function for parsing common external refs
Add v4l2_fwnode_parse_reference_sensor_common for parsing common
sensor properties that refer to adjacent devices such as flash or lens
driver chips.
As this is an association only, there's little a regular driver needs to
know about these devices as such.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-async.h | 3 | ||||
| -rw-r--r-- | include/media/v4l2-fwnode.h | 21 |
2 files changed, 23 insertions, 1 deletions
diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h index 17c4ac7c73e8..8d8cfc3f3100 100644 --- a/include/media/v4l2-async.h +++ b/include/media/v4l2-async.h @@ -156,7 +156,8 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier); * Release memory resources related to a notifier, including the async * sub-devices allocated for the purposes of the notifier but not the notifier * itself. The user is responsible for calling this function to clean up the - * notifier after calling @v4l2_async_notifier_parse_fwnode_endpoints. + * notifier after calling @v4l2_async_notifier_parse_fwnode_endpoints or + * @v4l2_fwnode_reference_parse_sensor_common. * * There is no harm from calling v4l2_async_notifier_cleanup in other * cases as long as its memory has been zeroed after it has been diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h index 105cfeee44ef..ca50108dfd8f 100644 --- a/include/media/v4l2-fwnode.h +++ b/include/media/v4l2-fwnode.h @@ -319,4 +319,25 @@ int v4l2_async_notifier_parse_fwnode_endpoints_by_port( struct v4l2_fwnode_endpoint *vep, struct v4l2_async_subdev *asd)); +/** + * v4l2_fwnode_reference_parse_sensor_common - parse common references on + * sensors for async sub-devices + * @dev: the device node the properties of which are parsed for references + * @notifier: the async notifier where the async subdevs will be added + * + * Parse common sensor properties for remote devices related to the + * sensor and set up async sub-devices for them. + * + * Any notifier populated using this function must be released with a call to + * v4l2_async_notifier_release() after it has been unregistered and the async + * sub-devices are no longer in use, even in the case the function returned an + * error. + * + * Return: 0 on success + * -ENOMEM if memory allocation failed + * -EINVAL if property parsing failed + */ +int v4l2_async_notifier_parse_fwnode_sensor_common( + struct device *dev, struct v4l2_async_notifier *notifier); + #endif /* _V4L2_FWNODE_H */ |