f139546fb7
Add a new machine driver to interface with WM8804. The code is based on settings found in sound/soc/bcm/hifiberry-digi.c in the Raspberry PI tree. Tested on Up2 with Digi+ IO (capture+playback) and Digi+ PRO (playback with two local oscillators supported). The codec is clock master in both cases. Capture support has known clocking restrictions: the transmitter needs to be active for the clock recovery, the "Tx Source" mixer set to "S/PDIF RX". Playback will only work while capture is active. When Capture is not desired, or when there is no RX connector, the "Tx Source" mixer should be set to "AIF" Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Link: https://lore.kernel.org/r/20200501151625.17820-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.