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author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2009-12-09 12:38:49 +0100 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-03-22 00:32:42 +0100 |
commit | 2096a5dcf9704f5a86ecba37169eb813aaf0431c (patch) | |
tree | 21e7d870302a7c6748667a785b465a7a84805228 /drivers/media/video/v4l2-subdev.c | |
parent | [media] v4l: subdev: Don't require core operations (diff) | |
download | linux-2096a5dcf9704f5a86ecba37169eb813aaf0431c.tar.xz linux-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 'drivers/media/video/v4l2-subdev.c')
-rw-r--r-- | drivers/media/video/v4l2-subdev.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c new file mode 100644 index 000000000000..037aa28a5ed1 --- /dev/null +++ b/drivers/media/video/v4l2-subdev.c @@ -0,0 +1,60 @@ +/* + * V4L2 subdevice support. + * + * Copyright (C) 2010 Nokia Corporation + * + * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/types.h> +#include <linux/ioctl.h> +#include <linux/videodev2.h> + +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> + +static int subdev_open(struct file *file) +{ + return 0; +} + +static int subdev_close(struct file *file) +{ + return 0; +} + +static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) +{ + switch (cmd) { + default: + return -ENOIOCTLCMD; + } + + return 0; +} + +static long subdev_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + return video_usercopy(file, cmd, arg, subdev_do_ioctl); +} + +const struct v4l2_file_operations v4l2_subdev_fops = { + .owner = THIS_MODULE, + .open = subdev_open, + .unlocked_ioctl = subdev_ioctl, + .release = subdev_close, +}; |