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The CS2000 chip features two input clocks, REF_CLK and CLK_IN. In static mode, the output clock (CLK_OUT) is directly derived from REF_CLK, and CLK_IN is ignored. In dynamic mode, CLK_IN is used by the digital PLL. In dynamic mode, a low-frequency ratio configuration that uses a higher multiplier factor. Until now, only the static mode and high-frequency divider rations of the hardware was supported by the driver. This patch adds support for dynamic mode and both ratios: * Parse a new OF property 'cirrus,dynamic-mode' to determine the mode * In dynamic mode, present CLK_IN as parent clock, else use REF_CLK * The low-frequency ratio mode is automatically selected, depending on the mode of operation and the given input and output rates Signed-off-by: Daniel Mack <daniel@zonque.org> Link: https://lore.kernel.org/r/20220125093336.226787-7-daniel@zonque.org Signed-off-by: Stephen Boyd <sboyd@kernel.org> |
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| kernel | ||
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| README | ||
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.