The module description line in the module-definition file should specify the type of device the driver supports. For example, here is the module description line from the module-definition file for the Sound Blaster driver:
DESCRIPTION 'wave,aux,mixer:Creative Labs Sound Blaster 16 Driver'
The beginning of the module description indicates the driver supports waveform, auxiliary, and mixer devices. Use one of the following device-type names, followed by a colon (:) to indicate the type of device your driver supports. If the driver supports more than one type of device, separate each device-type name with a comma (,).