From http://askubuntu.com/questions/168279/how-do-i-build-a-single-in-tree-kernel-module

build and install caiaq driver

# prepare to hold your colour
cd /usr/local/src/linux
cp /boot/config-$(uname -r) .config && make oldconfig

# enable CAIAQ module (CONFIG_SND_USB_CAIAQ=m)
# other recommended options:
#     CONFIG_SND_DEBUG=y
#     CONFIG_SND_DEBUG_VERBOSE=y
#     CONFIG_SND_VERBOSE_PRINTK=y
make xconfig

make prepare
make modules_prepare
make SUBDIRS=scripts/mod
make SUBDIRS=sound/usb/caiaq modules

# unplug device & unload old driver version & clean dmesg
sudo sh -c "echo 0 > /sys/bus/usb/devices/1-7/bConfigurationValue"
sudo modprobe -r snd-usb-caiaq
sudo dmesg --clear

# install driver
sudo cp sound/usb/caiaq/snd-usb-caiaq.ko /lib/modules/$(uname -r)/kernel/sound/usb/caiaq/
sleep 5
dmesg

# load new driver version & plug device
sudo modprobe snd-usb-caiaq
sudo sh -c "echo 1 > /sys/bus/usb/devices/1-7/bConfigurationValue"

# to rebuild driver after some change
sudo sh -c "echo 0 > /sys/bus/usb/devices/1-7/bConfigurationValue"; \
sudo modprobe -r snd-usb-caiaq; \
sudo dmesg --clear; \
make SUBDIRS=sound/usb/caiaq modules; \
sudo cp sound/usb/caiaq/snd-usb-caiaq.ko /lib/modules/$(uname -r)/kernel/sound/usb/caiaq/; \
sudo modprobe snd-usb-caiaq; \
sudo sh -c "echo 1 > /sys/bus/usb/devices/1-7/bConfigurationValue"; \
sleep 5; \
dmesg;