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

[Andrzej Pietrasiewicz]

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-***@public.gmane.org>
---
drivers/usb/gadget/Kconfig | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index c4880fc..c8a0784 100644
--- 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