usb: gadget: Kconfig: enable separate compilation of uac1/uac2 functions

uac1 and uac2 functions are available through the configfs interface
and it should be possible to build them without building their legacy
gadgets.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index c4880fc..c8a0784 100644 (file)
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -362,6 +362,37 @@ config USB_CONFIGFS_F_FS
          implemented in kernel space (for instance Ethernet, serial or
          mass storage) and other are implemented in user space.
 
+config USB_CONFIGFS_F_UAC1
+       boolean "Audio Class 1.0"
+       depends on USB_CONFIGFS
+       depends on SND
+       select USB_LIBCOMPOSITE
+       select SND_PCM
+       select USB_F_UAC1
+       help
+         This Audio function implements 1 AudioControl interface,
+         1 AudioStreaming Interface each for USB-OUT and USB-IN.
+         This driver requires a real Audio codec to be present
+         on the device.
+
+config USB_CONFIGFS_F_UAC2
+       boolean "Audio Class 2.0"
+       depends on USB_CONFIGFS
+       depends on SND
+       select USB_LIBCOMPOSITE
+       select SND_PCM
+       select USB_F_UAC2
+       help
+         This Audio function is compatible with USB Audio Class
+         specification 2.0. It implements 1 AudioControl interface,
+         1 AudioStreaming Interface each for USB-OUT and USB-IN.
+         This driver doesn't expect any real Audio codec to be present
+         on the device - the audio streams are simply sinked to and
+         sourced from a virtual ALSA sound card created. The user-space
+         application may choose to do whatever it wants with the data
+         received from the USB Host and choose to provide whatever it
+         wants as audio data to the USB Host.
+
 source "drivers/usb/gadget/legacy/Kconfig"
 
 endchoice