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736da8112f
The bspec lays out legal cdclk frequencies, PLL ratios, and CD2X dividers in an easy-to-read table for most recent platforms. We've been translating the data from that table into platform-specific code logic, but it's easy to overlook an area we need to update when adding new cdclk values or enabling new platforms. Let's just add a form of the bspec table to the code and then adjust our functions to pull what they need directly out of the table. v2: Fix comparison when finding best cdclk. v3: Another logic fix for calc_cdclk. v4: - Use named initializers for cdclk tables. (Ville) - Include refclk as a field in the table instead of adding all three ratios for each entry. (Ville) - Terminate tables with an empty entry to avoid needing to store the table size. (Ville) - Don't try so hard to return reasonable values from our lookup functions if we get impossible inputs; just WARN and return 0. (Ville) - Keep a bxt_ prefix on the lookup functions since they're still only used on bxt+ for now. We can rename them later if we extend this table-based approach back to older platforms. (Ville) v5: - Fix cnl table's ratios for 24mhz refclk. (Ville) - Don't miss the named initializers on the cnl table. (Ville) - Represent refclk in table as u16 rather than u32. (Ville) Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190910161506.7158-1-matthew.d.roper@intel.com |
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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.