From: Damien Zammit <damien@zamaudio.com>
Date: Tue, 11 Nov 2014 14:09:54 +0000 (+1100)
Subject: ALSA: usb-audio: Add mixer control for Digidesign Mbox 1 clock source
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~123^2~21^2~68
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d497a82fb18ed4b73c08f8b5a0935f937e2ea1fb;p=pandora-kernel.git

ALSA: usb-audio: Add mixer control for Digidesign Mbox 1 clock source

This patch provides the infrastructure for the Digidesign Mbox 1
to have a mixer control for selecting the clock source.
Valid options are Internal and S/PDIF external sync.
A non-documented command is sent to the device to enable this feature
found by reverse engineering and bus snooping.

Signed-off-by: Damien Zammit <damien@zamaudio.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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