diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/video4linux/v4l2-framework.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt index 854808b67fa..d54c1e4c6a9 100644 --- a/Documentation/video4linux/v4l2-framework.txt +++ b/Documentation/video4linux/v4l2-framework.txt | |||
| @@ -89,6 +89,11 @@ from dev (driver name followed by the bus_id, to be precise). If you set it | |||
| 89 | up before calling v4l2_device_register then it will be untouched. If dev is | 89 | up before calling v4l2_device_register then it will be untouched. If dev is |
| 90 | NULL, then you *must* setup v4l2_dev->name before calling v4l2_device_register. | 90 | NULL, then you *must* setup v4l2_dev->name before calling v4l2_device_register. |
| 91 | 91 | ||
| 92 | You can use v4l2_device_set_name() to set the name based on a driver name and | ||
| 93 | a driver-global atomic_t instance. This will generate names like ivtv0, ivtv1, | ||
| 94 | etc. If the name ends with a digit, then it will insert a dash: cx18-0, | ||
| 95 | cx18-1, etc. This function returns the instance number. | ||
| 96 | |||
| 92 | The first 'dev' argument is normally the struct device pointer of a pci_dev, | 97 | The first 'dev' argument is normally the struct device pointer of a pci_dev, |
| 93 | usb_interface or platform_device. It is rare for dev to be NULL, but it happens | 98 | usb_interface or platform_device. It is rare for dev to be NULL, but it happens |
| 94 | with ISA devices or when one device creates multiple PCI devices, thus making | 99 | with ISA devices or when one device creates multiple PCI devices, thus making |