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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2009-12-09 08:38:49 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-03-21 20:32:42 -0300
commit2096a5dcf9704f5a86ecba37169eb813aaf0431c (patch)
tree21e7d870302a7c6748667a785b465a7a84805228 /include/media/v4l2-subdev.h
parent0070d91e5b5ae594116202ab7d62d8264830b1cd (diff)
downloadlwn-2096a5dcf9704f5a86ecba37169eb813aaf0431c.tar.gz
lwn-2096a5dcf9704f5a86ecba37169eb813aaf0431c.zip
[media] v4l: subdev: Add device node support
Create a device node named subdevX for every registered subdev. As the device node is registered before the subdev core::s_config function is called, return -EGAIN on open until initialization completes. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Vimarsh Zutshi <vimarsh.zutshi@gmail.com> Acked-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include/media/v4l2-subdev.h')
-rw-r--r--include/media/v4l2-subdev.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index da16d2f4a00b..474ef009fd3d 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -22,6 +22,7 @@
#define _V4L2_SUBDEV_H
#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
#include <media/v4l2-mediabus.h>
/* generic v4l2_device notify callback notification values */
@@ -431,9 +432,11 @@ struct v4l2_subdev_internal_ops {
#define V4L2_SUBDEV_NAME_SIZE 32
/* Set this flag if this subdev is a i2c device. */
-#define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
+#define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
/* Set this flag if this subdev is a spi device. */
-#define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
+#define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
+/* Set this flag if this subdev needs a device node. */
+#define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
/* Each instance of a subdev driver should create this struct, either
stand-alone or embedded in a larger struct.
@@ -455,8 +458,15 @@ struct v4l2_subdev {
/* pointer to private data */
void *dev_priv;
void *host_priv;
+ /* subdev device node */
+ struct video_device devnode;
};
+#define vdev_to_v4l2_subdev(vdev) \
+ container_of(vdev, struct v4l2_subdev, devnode)
+
+extern const struct v4l2_file_operations v4l2_subdev_fops;
+
static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p)
{
sd->dev_priv = p;