---
name: "register_sound_dsp"
section: "9"
platform: "linux"
package: "linux-manual-3.16"
version: "3.16.56-1+deb8u1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/register_sound_dsp"
---

# register\_sound\_dsp(9)

register a DSP device

## NAME

register\_sound\_dsp - register a DSP device

## SYNOPSIS

**int register\_sound\_dsp(const 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.

This function allocates both the audio and dsp device entries together and will always allocate them as a matching pair - eg dsp3/audio3

## RETURN

On success, the allocated number is returned. On failure, a negative error code is returned.

## COPYRIGHT