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media: v4l2-fwnode: use a typedef for a function callback

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That allows having a kernel-doc markup for the function
prototype. It also prevents the need of describing the
return values twice.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
This commit is contained in:
Mauro Carvalho Chehab 2017-11-01 09:12:13 -04:00
parent 1acce5f72c
commit e2cec86528
1 changed files with 22 additions and 14 deletions
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36
include/media/v4l2-fwnode.h
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@ -203,6 +203,26 @@ int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
*/
void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
/**
* typedef parse_endpoint_func - Driver's callback function to be called on
* each V4L2 fwnode endpoint.
*
* @dev: pointer to &struct device
* @vep: pointer to &struct v4l2_fwnode_endpoint
* @asd: pointer to &struct v4l2_async_subdev
*
* Return:
* * %0 on success
* * %-ENOTCONN if the endpoint is to be skipped but this
* should not be considered as an error
* * %-EINVAL if the endpoint configuration is invalid
*/
typedef int (*parse_endpoint_func)(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd);
/**
* v4l2_async_notifier_parse_fwnode_endpoints - Parse V4L2 fwnode endpoints in a
* device node
@ -215,10 +235,6 @@ void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
* begin at the same memory address.
* @parse_endpoint: Driver's callback function called on each V4L2 fwnode
* endpoint. Optional.
* Return: %0 on success
* %-ENOTCONN if the endpoint is to be skipped but this
* should not be considered as an error
* %-EINVAL if the endpoint configuration is invalid
*
* Parse the fwnode endpoints of the @dev device and populate the async sub-
* devices array of the notifier. The @parse_endpoint callback function is
@ -253,9 +269,7 @@ void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
int v4l2_async_notifier_parse_fwnode_endpoints(
struct device *dev, struct v4l2_async_notifier *notifier,
size_t asd_struct_size,
int (*parse_endpoint)(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd));
parse_endpoint_func parse_endpoint);
/**
* v4l2_async_notifier_parse_fwnode_endpoints_by_port - Parse V4L2 fwnode
@ -271,10 +285,6 @@ int v4l2_async_notifier_parse_fwnode_endpoints(
* @port: port number where endpoints are to be parsed
* @parse_endpoint: Driver's callback function called on each V4L2 fwnode
* endpoint. Optional.
* Return: %0 on success
* %-ENOTCONN if the endpoint is to be skipped but this
* should not be considered as an error
* %-EINVAL if the endpoint configuration is invalid
*
* This function is just like v4l2_async_notifier_parse_fwnode_endpoints() with
* the exception that it only parses endpoints in a given port. This is useful
@ -315,9 +325,7 @@ int v4l2_async_notifier_parse_fwnode_endpoints(
int v4l2_async_notifier_parse_fwnode_endpoints_by_port(
struct device *dev, struct v4l2_async_notifier *notifier,
size_t asd_struct_size, unsigned int port,
int (*parse_endpoint)(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd));
parse_endpoint_func parse_endpoint);
/**
* v4l2_fwnode_reference_parse_sensor_common - parse common references on