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Some CPTS instances, which can be found on KeyStone 2 1G Ethernet Switch Subsystems, can control an external multiplexer that selects one of up to 32 clocks as time sync reference (RFTCLK) clock. This feature can be configured through CPTS_RFTCLK_SEL register (offset: x08) in CPTS module and can be represented as multiplexer clock. Hence, introduce support for optional cpts-refclk-mux clock, which, once defined will allow to select required CPTS RFTCLK by using assigned-clock-parents DT property in board files. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.