ALSA: hda - Make snd_hda_bus_type public

Define the common hd-audio driver and device types to bind over
snd_hda_bus_type publicly.  This allows to implement other type of
device and driver code over hd-audio bus.

Now both struct hda_codec and struct hda_codec_driver inherit these
new struct hdac_device and struct hdac_driver, respectively.

The bus registration is done in subsys_initcall() to assure it
before any other driver registrations.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig
new file mode 100644
index 000000000000..4f428ccf64ad
--- /dev/null
+++ b/sound/hda/Kconfig
@@ -0,0 +1,2 @@
+config SND_HDA_CORE
+	tristate