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The cs42l43 has both a SPI master and an I2S interface, these can be used to populate 2 cs35l56 amplifiers as sidecar devices along side the cs42l43. Giving a system that looks like: +-----+ +---------+ <- SPI -> +---------+ | CPU | <- SDW -> | CS42L43 | | CS35L56 | +-----+ +---------+ <- I2S -> +---------+ Add a quirk to specify this feature is present and use it to add codec to codec DAI link to connect the amplifiers into the sound card, add appropriate widgets, and setup clocking on the amplifiers. Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Signed-off-by: Maciej Strozek <mstrozek@opensource.cirrus.com> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20240426152123.36284-13-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 reStructuredText 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.