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media: v4l: fwnode: Add a convenience function for registering sensors

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Add a convenience function for parsing firmware for information on related
devices using v4l2_async_notifier_parse_fwnode_sensor_common() registering
the notifier and finally the async sub-device itself.

This should be useful for sensor drivers that do not have device specific
requirements related to firmware information parsing or the async
framework.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sakari Ailus 2017-09-24 18:47:44 -04:00 • committed by Mauro Carvalho Chehab
parent 7a9ec808ad
commit aef69d5475
4 changed files with 81 additions and 4 deletions
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22
include/media/v4l2-async.h
View file

@ -173,6 +173,28 @@ void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier);
*/
int v4l2_async_register_subdev(struct v4l2_subdev *sd);
/**
* v4l2_async_register_subdev_sensor_common - registers a sensor sub-device to
* the asynchronous sub-device
* framework and parse set up common
* sensor related devices
*
* @sd: pointer to struct &v4l2_subdev
*
* This function is just like v4l2_async_register_subdev() with the exception
* that calling it will also parse firmware interfaces for remote references
* using v4l2_async_notifier_parse_fwnode_sensor_common() and registers the
* async sub-devices. The sub-device is similarly unregistered by calling
* v4l2_async_unregister_subdev().
*
* While registered, the subdev module is marked as in-use.
*
* An error is returned if the module is no longer loaded on any attempts
* to register it.
*/
int __must_check v4l2_async_register_subdev_sensor_common(
struct v4l2_subdev *sd);
/**
* v4l2_async_unregister_subdev - unregisters a sub-device to the asynchronous
* subdevice framework