From 9bea3514dd4a44490b53cc52498b2967e48056dd Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Tue, 23 Dec 2008 07:35:17 -0300 Subject: [PATCH] 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: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/v4l2-dev.c | 3 +++ include/media/v4l2-dev.h | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 4e0db8845e04..7ad6711ee327 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -30,6 +30,7 @@ #include #include +#include #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 diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index e0d72d2c6f0e..0a88d1d17d30 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -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]; -- 2.20.1