'\" t
.\"     Title: snd_jack_set_key
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Miscellaneous Functions
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SND_JACK_SET_KEY" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Miscellaneous Functions"
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.SH "NAME"
snd_jack_set_key \- Set a key mapping on a jack
.SH "SYNOPSIS"
.HP \w'int\ snd_jack_set_key('u
.BI "int snd_jack_set_key(struct\ snd_jack\ *\ " "jack" ", enum\ snd_jack_types\ " "type" ", int\ " "keytype" ");"
.SH "ARGUMENTS"
.PP
\fIjack\fR
.RS 4
The jack to configure
.RE
.PP
\fItype\fR
.RS 4
Jack report type for this key
.RE
.PP
\fIkeytype\fR
.RS 4
Input layer key type to be reported
.RE
.SH "DESCRIPTION"
.PP
Map a SND_JACK_BTN_ button type to an input layer key, allowing reporting of keys on accessories via the jack abstraction\&. If no mapping is provided but keys are enabled in the jack type then BTN_n numeric buttons will be reported\&.
.PP
If jacks are not reporting via the input API this call will have no effect\&.
.PP
Note that this is intended to be use by simple devices with small numbers of keys that can be reported\&. It is also possible to access the input device directly \- devices with complex input capabilities on accessories should consider doing this rather than using this abstraction\&.
.PP
This function may only be called prior to registration of the jack\&.
.SH "RETURN"
.PP
Zero if successful, or a negative error code on failure\&.
.SH "COPYRIGHT"
.br