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[media] V4L2: add a common V4L2 subdevice platform data type
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>
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@ -559,6 +559,17 @@ struct v4l2_subdev_internal_ops {
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/* Set this flag if this subdev generates events. */
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#define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
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struct regulator_bulk_data;
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struct v4l2_subdev_platform_data {
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/* Optional regulators uset to power on/off the subdevice */
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struct regulator_bulk_data *regulators;
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int num_regulators;
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/* Per-subdevice data, specific for a certain video host device */
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void *host_priv;
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};
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/* Each instance of a subdev driver should create this struct, either
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stand-alone or embedded in a larger struct.
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*/
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@ -592,6 +603,8 @@ struct v4l2_subdev {
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struct v4l2_async_subdev *asd;
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/* Pointer to the managing notifier. */
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struct v4l2_async_notifier *notifier;
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/* common part of subdevice platform data */
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struct v4l2_subdev_platform_data *pdata;
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};
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#define media_entity_to_v4l2_subdev(ent) \
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