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[media] V4L2: add a common V4L2 subdevice platform data type

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This struct shall be used by subdevice drivers to pass per-subdevice data,
e.g. power supplies, to generic V4L2 methods, at the same time allowing
optional host-specific extensions via the host_priv pointer. To avoid
having to pass two pointers to those methods, add a pointer to this new
struct to struct v4l2_subdev.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Guennadi Liakhovetski 2013-04-18 18:35:27 -03:00 committed by Mauro Carvalho Chehab
parent 507fcd3da2
commit b1cbab05d9
1 changed files with 13 additions and 0 deletions
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13
include/media/v4l2-subdev.h
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@ -559,6 +559,17 @@ struct v4l2_subdev_internal_ops {
/* Set this flag if this subdev generates events. */ /* Set this flag if this subdev generates events. */
#define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3) #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
struct regulator_bulk_data;
struct v4l2_subdev_platform_data {
/* Optional regulators uset to power on/off the subdevice */
struct regulator_bulk_data *regulators;
int num_regulators;
/* Per-subdevice data, specific for a certain video host device */
void *host_priv;
};
/* Each instance of a subdev driver should create this struct, either /* Each instance of a subdev driver should create this struct, either
stand-alone or embedded in a larger struct. stand-alone or embedded in a larger struct.
*/ */
@ -592,6 +603,8 @@ struct v4l2_subdev {
struct v4l2_async_subdev *asd; struct v4l2_async_subdev *asd;
/* Pointer to the managing notifier. */ /* Pointer to the managing notifier. */
struct v4l2_async_notifier *notifier; struct v4l2_async_notifier *notifier;
/* common part of subdevice platform data */
struct v4l2_subdev_platform_data *pdata;
}; };
#define media_entity_to_v4l2_subdev(ent) \ #define media_entity_to_v4l2_subdev(ent) \