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media: v4l2: async: Add convenience functions to allocate and add asd's

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Add these convenience functions, which allocate an asd of match type
fwnode, i2c, or device-name, of size asd_struct_size, and then adds
them to the notifier asd_list.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Steve Longerbeam
2018-09-29 15:54:07 -04:00
committed by Mauro Carvalho Chehab
parent b47d7ff1ae
commit 23989b43f1
2 changed files with 138 additions and 0 deletions
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62
include/media/v4l2-async.h
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@@ -174,6 +174,68 @@ void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier);
int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
struct v4l2_async_subdev *asd);
/**
* v4l2_async_notifier_add_fwnode_subdev - Allocate and add a fwnode async
* subdev to the notifier's master asd_list.
*
* @notifier: pointer to &struct v4l2_async_notifier
* @fwnode: fwnode handle of the sub-device to be matched
* @asd_struct_size: size of the driver's async sub-device struct, including
* sizeof(struct v4l2_async_subdev). The &struct
* v4l2_async_subdev shall be the first member of
* the driver's async sub-device struct, i.e. both
* begin at the same memory address.
*
* This can be used before registering a notifier to add a
* fwnode-matched asd to the notifiers master asd_list. If the caller
* uses this method to compose an asd list, it must never allocate
* or place asd's in the @subdevs array.
*/
struct v4l2_async_subdev *
v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
struct fwnode_handle *fwnode,
unsigned int asd_struct_size);
/**
* v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async
* subdev to the notifier's master asd_list.
*
* @notifier: pointer to &struct v4l2_async_notifier
* @adapter_id: I2C adapter ID to be matched
* @address: I2C address of sub-device to be matched
* @asd_struct_size: size of the driver's async sub-device struct, including
* sizeof(struct v4l2_async_subdev). The &struct
* v4l2_async_subdev shall be the first member of
* the driver's async sub-device struct, i.e. both
* begin at the same memory address.
*
* Same as above but for I2C matched sub-devices.
*/
struct v4l2_async_subdev *
v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
int adapter_id, unsigned short address,
unsigned int asd_struct_size);
/**
* v4l2_async_notifier_add_devname_subdev - Allocate and add a device-name
* async subdev to the notifier's master asd_list.
*
* @notifier: pointer to &struct v4l2_async_notifier
* @device_name: device name string to be matched
* @asd_struct_size: size of the driver's async sub-device struct, including
* sizeof(struct v4l2_async_subdev). The &struct
* v4l2_async_subdev shall be the first member of
* the driver's async sub-device struct, i.e. both
* begin at the same memory address.
*
* Same as above but for device-name matched sub-devices.
*/
struct v4l2_async_subdev *
v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier,
const char *device_name,
unsigned int asd_struct_size);
/**
* v4l2_async_notifier_register - registers a subdevice asynchronous notifier
*