diff options
Diffstat (limited to 'linux/Documentation')
| -rwxr-xr-x[-rw-r--r--] | linux/Documentation/dvb/get_dvb_firmware | 0 | ||||
| -rwxr-xr-x[-rw-r--r--] | linux/Documentation/video4linux/extract_xc3028.pl | 0 | ||||
| -rw-r--r-- | linux/Documentation/video4linux/v4l2-framework.txt | 12 |
3 files changed, 7 insertions, 5 deletions
diff --git a/linux/Documentation/dvb/get_dvb_firmware b/linux/Documentation/dvb/get_dvb_firmware index f2e908d7f..f2e908d7f 100644..100755 --- a/linux/Documentation/dvb/get_dvb_firmware +++ b/linux/Documentation/dvb/get_dvb_firmware diff --git a/linux/Documentation/video4linux/extract_xc3028.pl b/linux/Documentation/video4linux/extract_xc3028.pl index 2cb816047..2cb816047 100644..100755 --- a/linux/Documentation/video4linux/extract_xc3028.pl +++ b/linux/Documentation/video4linux/extract_xc3028.pl diff --git a/linux/Documentation/video4linux/v4l2-framework.txt b/linux/Documentation/video4linux/v4l2-framework.txt index 48cdf8624..accc376e9 100644 --- a/linux/Documentation/video4linux/v4l2-framework.txt +++ b/linux/Documentation/video4linux/v4l2-framework.txt @@ -84,12 +84,14 @@ You must register the device instance: v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev); Registration will initialize the v4l2_device struct and link dev->driver_data -to v4l2_dev. Registration will also set v4l2_dev->name to a value derived from -dev (driver name followed by the bus_id, to be precise). You may change the -name after registration if you want. +to v4l2_dev. If v4l2_dev->name is empty then it will be set to a value derived +from dev (driver name followed by the bus_id, to be precise). If you set it +up before calling v4l2_device_register then it will be untouched. If dev is +NULL, then you *must* setup v4l2_dev->name before calling v4l2_device_register. The first 'dev' argument is normally the struct device pointer of a pci_dev, -usb_device or platform_device. +usb_device or platform_device. It is rare for dev to be NULL, but it happens +with ISA devices, for example. You unregister with: @@ -266,7 +268,7 @@ errors (except -ENOIOCTLCMD) occured, then 0 is returned. The second argument to both calls is a group ID. If 0, then all subdevs are called. If non-zero, then only those whose group ID match that value will -be called. Before a bridge driver registers a subdev it can set subdev->grp_id +be called. Before a bridge driver registers a subdev it can set sd->grp_id to whatever value it wants (it's 0 by default). This value is owned by the bridge driver and the sub-device driver will never modify or use it. |