snd_jack_set_key9
Set a key mapping on a jack
Arguments
jack
The jack to configure
type
Jack report type for this key
keytype
Input layer key type to be reported
Overview
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.
If jacks are not reporting via the input API this call will have no effect.
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.
This function may only be called prior to registration of the jack.
Return
Zero if successful, or a negative error code on failure.
History
- Debian 9 (Stretch): the text shown here
- Debian 8 (Jessie)
- Debian 7 (Wheezy)