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The existing code uses a static lookup table to determine the settings of the various clock devices on board the chip. This is limiting in a couple of ways. First, this doesn't allow for any master clock rates other than the three that have been precalculated. Additionally, new sample rates are difficult to add to the table. Witness that the chip is capable of 192000 Hz sampling, but it is not provided by this driver. Last, if the driver is clocked by something that isn't a crystal, the upstream clock may not be able to achieve exactly the rate requested in the driver. This will mean that clocking will be slightly off for the sampling clock or that it won't work at all. This patch determines the settings for all of the clocks at runtime considering the real conditions of the clocks in the system. The rules for the clocks are in TI's SLAA557 application guide on pages 37, 51 and 77. Signed-off-by: Annaliese McDermond <nh6z@nh6z.net> 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.