Provided by:
linux-doc-2.6.15_2.6.15-23.39_all 
NAME
register_sound_dsp - register a DSP device
SYNOPSIS
int register_sound_dsp (struct file_operations * fops, int dev);
ARGUMENTS
fops File operations for the driver
dev Unit number to allocate
DESCRIPTION
Allocate a DSP device. Unit is the number of the DSP requested. Pass -1
to request the next free DSP unit. On success the allocated number is
returned, on failure a negative error code is returned.
This function allocates both the audio and dsp device entries together
and will always allocate them as a matching pair - eg dsp3/audio3