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Commit 9bea3514 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
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V4L/DVB (9974): v4l2-dev: allow drivers to pass v4l2_device as parent 



Drivers that use v4l2_device can set that as parent pointer in the v4l2_dev
field instead of using the struct device parent field.

This allows v4l2-dev.c to check whether this driver is v4l2_device based,
and if so then it can offer additional services.

Signed-off-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent dc93a70c

drivers/media/video/v4l2-dev.c

+3 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <asm/system.h>



#include <media/v4l2-common.h>

#include <media/v4l2-device.h>



#define VIDEO_NUM_DEVICES	256

#define VIDEO_NAME              "video4linux"
@@ -407,6 +408,8 @@ int video_register_device_index(struct video_device *vdev, int type, int nr, 


	vdev->vfl_type = type;

	vdev->cdev = NULL;

	if (vdev->v4l2_dev)

		vdev->parent = vdev->v4l2_dev->dev;



	/* Part 2: find a free minor, kernel number and device index. */

#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES

include/media/v4l2-dev.h

+4 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#define VFL_TYPE_MAX		4



struct v4l2_ioctl_callbacks;

struct v4l2_device;



/* Flag to mark the video_device struct as unregistered.

   Drivers can set this flag if they want to block all future
@@ -45,7 +46,10 @@ struct video_device 
	/* sysfs */

	struct device dev;		/* v4l device */

	struct cdev *cdev;		/* character device */



	/* Set either parent or v4l2_dev if your driver uses v4l2_device */

	struct device *parent;		/* device parent */

	struct v4l2_device *v4l2_dev;	/* v4l2_device parent */



	/* device info */

	char name[32];