ALSA: snd-usb-caiaq: Add support for Traktor Kontrol S4

This patch adds support for the new Traktor Kontrol S4 by Native
Instruments. It features a new audio data streaming model, MIDI
in and out ports, a huge number of 174 dimmable LEDs, 96 buttons
and 46 absolute encoder axis, including some rotary encoders.

All features are supported by the driver now.

Did some code refactoring along the way.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig
index 44d6d2ec964f..112984f4080f 100644
--- a/sound/usb/Kconfig
+++ b/sound/usb/Kconfig
@@ -65,6 +65,7 @@ config SND_USB_CAIAQ
             * Native Instruments Guitar Rig Session I/O
             * Native Instruments Guitar Rig mobile
             * Native Instruments Traktor Kontrol X1
+            * Native Instruments Traktor Kontrol S4
 
            To compile this driver as a module, choose M here: the module
            will be called snd-usb-caiaq.
@@ -82,6 +83,7 @@ config SND_USB_CAIAQ_INPUT
            * Native Instruments Kore Controller
            * Native Instruments Kore Controller 2
            * Native Instruments Audio Kontrol 1
+           * Native Instruments Traktor Kontrol S4
 
 config SND_USB_US122L
         tristate "Tascam US-122L USB driver"